SKYTRON 3600 O/R Table Service Manual
Contents
1. 47 5 13 Micro Switch Troubleshooting densancersetenconnencancxesgusscanmeageecamautaiateniakoaedieces 48 A WARNING A NOTE Indicates a possibility of personal injury Indicates important facts or helpful hints A CAUTION A Indicates a possibility of damage to equipment Page 3 BASIC RECOMMENDED TOOLS 1 8 1 4 STRAIGHT BLADE SCREWDRIVERS 2 PHILLIPS SCREWDRIVER HYDRAULIC PRESSURE GAUGE SKYTRON P N 6 050 02 METRIC ALLEN WRENCHES 1 5mm 8mm ADJUSTABLE CRESCENT WRENCH DIGITAL VOLTMETER TRUE RMS METRIC OPEN END WRENCHES 7mm 18mm LEVEL CARPENTERS GREASE GUN BEARING GREASE P N D6 010 89 1 BASIC RECOMMENDED MAINTENANCE PROCEDURES The basic items notes below should be inspected at a minimal interval period of 6 months dependant on usage For optimal usage safety and longevity of the product have it serviced only by an authorized Skytron representative with authentic Skytron replacement parts Check Power Cord if applicable Check Pendant Control if applicable Check Oil Level in Reservoir Check For Hydraulic Leaks Check Pressure Relief Valve Setting Check Table Functions Check Side Rails and Gravity Stops Check Velcro Check Lateral Tilt Housing Bolts Lubricate Elevation Slider Assembly with Mobilux EP Extreme Pressure Grease P N D6 010 89 1 e Tighten X Ray Top Stand Offs Use Lo2. 3 7 11 15 8 12 16 4 7 1 15 19 1 5 9 13 p at AGO 4 8 12 16 20 82205 516 Figure 5 17 Solenoid Test 46 Whenever there are several compo nents of the same type a defective unit can also be detected by substi tuting a Known good unit or wire con nector In some cases this may be faster than using a multi meter 5 11 Motor Pump Assembly The hydraulic pump motor is a thermally protected 24 volt DC electric motor The oil pump unit is attached to the bottom of the motor and is a gear type displacement pump witha pumping capacity of 4 liter per min The Motor Pump Assembly is mounted on insulators in the base of the table a Motor Pump Test 1 Make sure all connectors are connected and activate the AC120V operating mode See figure 5 18 2 Test HN4 at pin 1 and pin 2 with a DC voltmeter Meter should read approximately 24 28 volts when any function button is activated If no voltage is present use an ohmmeter to test the continuity from HN4 to CN4 red and black wires 82205 517 Figure 5 18 Motor Input Voltage NOTE If the pump has been activated continu ously for 1 1 2to 2 minutes the thermal relay will interrupt the power to the pump b Thermal Protector Test The Thermal Protector is built in to the pump motor and is used to interrupt the current flow to the pump motor to protect it from possible damage due to overheating 1 Turn
3. MINI VALVE INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO RESERVOIR 00 RIGHT CIRCUIT LEFT CIRCUIT FLEXIBLE HOSE 82205 303 Figure 3 3 Lateral Tilt Circuit 3 6 FLEX SYSTEM DIAGNOSIS CHART Problem Back Section or Trendelenburg function moves improperly NOTE If Flex System does not function prop erly check the back section and Trendelenburg functions before ad justing the flex system Back Section or Trendelenburg function chatters or loses position TRENDELENBURG CIRCUIT PLUMBING TRENDELENBURG TERMINAL MINI VALVE TO BACK SECTION MINI VALVE INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO RESERVOIR Page 25 Reason Incorrect Speed Adjustment Trendelenburg Back section or Flex check with gauge Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Kidney Bridge Raised Worn Ball Joint and Retainer Nut Defective or Dirty Check Valves Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil FLEXIBLE HOSE 82205 304 Figure 3 4 Flex System Circuit 26 Problem Back Section function moves improperly Back Section function chatters or loses position NOTE ONE SIDE SHOWN FOR CLARITY PLUMBING TERMINAL COPPER LINE CHECK V
4. ato 7 J Fr F xs Y rei MN I d w A A A A ANI N SURGICAL TABLE MAINTENANCE MANUAL MODEL 3600B ULTRASLIDE REV 1 07 1 TABLE OF CONTENTS Title Page Basic Recommended Tools amp Maintenance 3 Equipment Lables amp Specifications uuu uu LU mI S x EOM MEDIE 4 Table amp Electrical Specifications ERE meet 5 SECTION HYDRAULIC SYSTEM ES 7 yu ull u u E 7 1 2 Component Operation amat 8 Motor Pump Operation 8 b Pressure Relief Valve e OM PO 8 au 9 d Hydraulic Cylinders Slave Cylinders 11 e Elevation Cylinder Return Circuit dtc rS 13 f Brake System umu uu uu a me 13 g Emergency Brake Release U n 14 h Flex Hellex System dicen Masa A Ta AE te Iu NA Pacuv tM KU US DUM MAU 14 1 3 Hydraulic Adjustments U 15 a Fluid Gevel H 15 b Bleeding The Hydraulic System retia Dx itte 15 Pressure Ml 15 q Speed a En 16 SECTION Il
5. 5 3600 UltraSlide General Purpose Surgical Table Specifications 14 1 2 12 1 2 gt 18 1 4 J 25 23 40 3 4 SIDE VIEW END VIEW ENTELA CERTIFIED Electrical Specifications TO UL2601 1 Power requirements 120 60Hz 450 Watts CAN CSA601 1 IEC 60601 2 46 Current Leakage Less than 100 micro amps US Power Cord 15 feet w hospital grade ar I connector removable C Certified KYTRON REFER TO d AH ma IN 616 957 0500 SERIAL NUMBER TAG 6 SECTION HYDRAULIC SYSTEM 1 1 General The hydraulic system with the exception of the hydraulic cylinders and hoses is contained within the base of the table The hydraulic valves and pump are electrically controlled by the use of a hand held push button pendant control The power requirements for the table are 120 VAC 5 amp 60 Hz The table contains the following components Re fer to the block diagram figure 1 1 for relationship a Oil Reservoir Main oil supply Approximately two quarts b Motor Pump Assembly A positive displace ment gear type pump provides the necessary oil pressure and volume 3 TRENDELENBURG CYLINDER 4 BRAKE ASSEMBLIES ELEVATION CYLINDER PLUMBING TERMINAL L Page 7 c Pressure Relief Valve Provides an alternate oil path when the hydraulic cylinders reach the end
6. lt RESERVOIR ZI 5 MAIN RETURN OIL GALLERY lt eS MOTOR PUMP ASSEMBLY PUMP OUTLET INLET 82205 102 Figure 1 2 b Pressure Relief Valve This device provides an alternate oil path back to the reservoir when the hydraulic cylinders reach the end of their stroke and the pump continues to run Ifthis path were not provided the pump motor would stall because the oil cannot be compressed The pressure relief valve is directly connected to the mini valve bodies and shares both the common internal main pressure oil galley and the return oil galley that internally connects to the reservoir See figure 1 3 The main component of the valve is an adjustable spring loaded plunger that when it is pushed off from its seat by the oil pressure the oil then flows back into the reservoir See figure 1 4 Turning the adjustment nut clockwise increases the amount of oil pressure required to open the valve and turning it counterclockwise decreases the amount of oil pressure See adjustment section for specifica tion PRESSURE RELIEF ADJUSTMENT NUT SPRING LOADED PLUNGER PRESSURE GAUGE PRESSURE oS RET URN 82205 103 Figure 1 3 Pressure Relief Valve Not Functioning PRESSURE RELIEF ADJUSTMENT NUT SPRING LOADED PLUNGER PRESSURE GAUGE OIL LINE FROM PUMP OIL RESERVOIR 82205 104 Figure 1 4 Pressure Relief Valve F
7. MECHANICAL TABLE ADJUSTMEHRNTS dioe EE x 17 2 1 Back Section Gear Mesh Adjustment aee abe Ead kb E 17 2 2 Hydraulic Cylinder Adjustment educ portta dac deb rapa npa RUE RR 17 Wbc co 4o cipe e T 17 D Leg Section a Ele 18 c Trendelenburg Cylinder Ball Joint 18 2 3 Head rec 18 2 4 Slide Roller Adjustment u atu ena uS cp 19 2 5 Side Rails uuu cana ene 19 2 0 Ee cT 19 SECTION Il HYDRAULIC TROUBLESHOOTING 21 21 3 2 Troubleshooting Notes u u u L uu 21 3 3 ELEVATION DIAGNOSIS CHAR T ee 22 3 4 TRENDELENBURG DIAGNOSIS CHART n 23 3 5 LATERAL TILT DIAGNOSIS CHART 24 3 6 FLEX SYSTEM DIAGNOSIS CHART 25 REV 1 07 Although current at the time of publication SKYTRON S policy of continuous development makes this manual subject to change without notice 2 TABLE OF CONTENTS continued Title Page 3 7 BACK SECTION DIAGNOSIS CHART 26 3 8 LEG SECTION DIA
8. NOTE When CN 10 is disconnected Back Down function will not operate NS 7 CN10 PURPLE a PURPLE 7 BROWN M M M BROWN 13 GREEN GREEN gaENNIHITE NS 7 LEG SECTION DOWN NS 8 LEG SECTION UP TEST AT PINS 7 amp 26 TEST AT PINS 13 amp 26 Table Position Switch Position Meter Reading Table Position Switch Position Meter Reading Level Open Infinity Level Open Infinity Leg Down Closed 0 Leg Up Closed 0 When the Leg Section is Down When the Leg Section is Up 091305 07 NS 7 brings the Leg Section Up to level NS 8 brings the Leg Section Down to level Figure 5 26 Leg Section Return Switches NC SIDE VIEW CN10 PURPLE WHITE 1 PURPLE WHITE N pn BLACK WHITE 4 BLACK WHITE lt cs 2 www LIGHT BLUE 000 2 NV LIGHT BLUE 13 Back CS 1 BACK DOWN INHIBIT CS 2 LEG DOWN 45 INHIBIT LS 2 LEG DOWN SLIDE INHIBIT TEST AT PINS 9 amp 23 TEST AT PINS 10 amp 23 TEST AT PINS 18 amp 23 Table Switch Meter Table Switch Meter Table Switch Meter Position Position Reading Position Position Reading Position Position Reading Center Closed 0 Center Infinity Slide lt 772 to Head Open Infinity Slide HD Closed 0 Slide HD 0 Slide gt 7 to Head Closed 0 Slide FT Open Infinity Slide FT Infinity When Top is slid toward Foot When Top is slid toward Head When Leg Section is below horizont
9. TT primary PISTON Sg PISTON SECONDARY SLIDER S gt ASSEMBLY 82205 111 Figure 1 11 Elevation Cylinder Assembly 5 Kidney Lift Cylinders The two kidney lift cylinders have a ram that has rack gear teeth cut into the top surface O Rings on each end of the ram allow the ram to also serve as the pistons The rack teeth cut into the top of the ram meshes with a pinion gear This gear meshes with other gears to supply the up or down drive for the kidney lift bars depending on which direction the oil is pumped into the cylinder See figure 1 12 o ax PINION GEAR 82205 112 N 2 X lt lt gr 0 RINGS 0 RINGS Figure 1 12 Kidney Lift Cylinder Assembly 6 Brake Cylinders The brake cylinders are single action type similar to the elevation cylinder The movable piston s ram is connected to a brake pad See figure 1 13 Oil pumped into the top of the cylinder pushes the piston down raising the table base off its casters An internal return spring on the bottom of the piston pushes the piston up to return the oil through the mini valve to the reservoir RETURN SPRING PISTON BRAKE PAD 2205 4143 Figure 1 13 Single Action Brake Cylinder Elevation Cylinder Return Circuit A three way single check valve type mini valve controls both the elevation and return circu
10. and connect ing rods The connecting rods attach to the lateral tilt lever which connects to the table center column assembly The cylinder housing attaches to the table top and is attached to the center column assembly by pivots See figure 1 10 The pistons and connecting rods are attached to a non movable surface Therefore when hydraulic fluid is pumped into one side the cylinder housing itself moves around the lateral tilt lever causing the table top to tilt to one side To tilt the table top in the opposite direction fluid is pumped into the opposite cylinder CONNECTING RODS F4 PAR gt gt CON A O LATERAL PISTON TILT LEVER 82205 110 Figure 1 10 Lateral Tilt Cylinder Assembly 12 4 Elevation Cylinder This single action cylin der does not have hydraulic fluid on both sides of the piston It depends on the weight of the table top assembly to lower it The cylinder is set in the center of the elevation main column The two stage cylinder is elevated by the driven force of the oil pressure When lowering the oil thatis accumulated in the cylinder is returned to the oil reservoir through the mini valve due to the table top weight A slider support assembly is used to support the weight of the upper table section A stainless steel shroud covers the flexible hydraulic hoses and slider See figure 1 11 ELEVATION CYLINDER is
11. cylinders and the oil reservoir See figure 1 16 When the valve is opened turned counter clockwise a return circuit for the brake hydraulic fluid is opened The return springs force the pistons up pushing the hydraulic oil back into the reservoir and retracting the brake pads EMERGENCY RELEASE 82205 116 Figure 1 16 NOTE eThe emergency brake release valve must be tightened securely when notin use elf the emergency brake release valve has been operated the UNLOCK but ton on the pendant control may have to be pressed before brakes will lock again If the emergency brake release valve is open the brakes will release slowly depending on how far open the valve is this could take anywhere from a few minutes to several hours h Flex Reflex System The Flex Reflex system incorporates an additional mini valve which connects the Trendelenburg and back section hydraulic systems in a series When FLEX is activated by the pendant control the Flex Reflex mini valve opens the oil pressure path to the Reverse Trendelenburg piston The return oil path from the Trendelenburg piston is routed through the back section cylinder to the mini valve return port See figure 1 17 PLUMBING TERMINAL VALVES 82205 117 Figure 1 17 Flex Reflex System 1 3 Hydraulic Adjustments a Fluid Level The fluid level should be approximately 1 2 below the filler hole or gasket surface If additional fluid
12. function should move in either direc tion at the same rate If the rate of a certain function is too slow open the speed control slightly and recheck Use the second hand ona watch and time a particular function Match that time in the oppo site direction by opening or closing the speed control Approximate operating times are as fol lows Lateral Tilt 7 seconds Leg Up 25 seconds Leg Down 15 seconds Kidney Lift 7 seconds Slide 29 seconds A pressure gauge should be used to set the speed of the back section Trendelenburg and flex control functions To adjust 1 Attach the pressure gauge onto the main oil galley as shown in figure 1 19 2 The gauge should read the following values when operating the various control functions in either direction Turn the speed controls until desired values are obtained Back Section Up 65KG CM 925PSI 65KG CM 925PSI Up 65KG CM 925PSI Dn 65KG CM 925PSI Flex 70KG CM 995PSI Reflex 70KG CM 995PSI Trendelenburg NOTE When adjusting Flex Reflex speed con trols set Reflex last Elevation There is a speed adjustment for raising the table The speed control will only affect the rate of descent and it should equal the rate of elevation SECTION MECHANICAL TABLE ADJUSTMENTS 2 1 Back Section Gear Mesh Adjustment The gear mesh is adjusted by the use of an eccen tric cam This cam moves the gear teeth closer together to eliminate gear lash This adjustment a
13. of their stroke d Electro Hydraulic Mini Valve Assemblies These direct the fluid to the appropriate hydraulic cylin ders e Hydraulic Lines Fittings Connections They provide a path for the hydraulic oil f Hydraulic Cylinders They convertthe hydraulic fluid pressure and volume into mechanical motion EMERGENCY BRAKE RELEASE BRAKE ELEV TILT FLEX BACK MOTOR PUMP ASSEMBLY 82205 101 Figure 1 1 Hydraulic Block Diagram 8 1 2 Component Operation a Motor Pump Operation The motor pump assembly is a gear type pump that provides the oil pressure and volume for the entire hydraulic system The pump has an inlet side and an outlet side The inlet side is connected to the reservoir which provides the oil supply The reservoir has a very fine mesh screen strainer which prevents foreign material from entering the oil system The output line of the pump is connected to the main oil galley which is internal and common to all the hydraulic mini valves and pressure relief valve Also common to the hydraulic mini valves and pressure relief valve is an oil galley that internally connects to the oil reservoir to provide a return path for the hydraulic oil See figure 1 2 PRESSURE MAIN PRESSURE OIL GALLERY internal Ae RELIEF VALVE WINES Q
14. or connector CN2 82205 510 Figure 5 10 Auxiliary Switch Test Green White Brown Yellow Blue White Orange Gray Green Yellow White Brown White Red White Blue 16 B8 Orange White B8 B2 B8 A3 B8 A4 B8 A1 B8 A7 B8 B6 REV TILT BACK TABLE LEG BRAKE TREND RIGHT UP UP UP LOCK TILT BACK TABLE LEG KIDNEY LEFT DOWN DOWN DOWN DOWN B8 A2 B8 B3 B8 B4 B8 B1 B8 B7 B8 A6 82205 509 Figure 5 9 Auxiliary Switch Connector CN2 42 5 8 The power supply is directly connected to the relay contacts When these contacts are closed 24 volts is supplied to the solenoids which are mounted on the hydraulic mini valves One relay is used to supply power to the pump motor and is always activated no matter what control function is se lected The brake locking circuit relay is also activated when any control function other than BRAKE UNLOCK is initially selected Also inside the relay box is a step down trans former and full wave rectifier which decreases the voltage to 5 6 volts This low voltage potential controls the relays by the use of the hand held pendant control buttons Basically the relays en able a 5 6 volt potential to control the 24 volt circuit The following tests will determine if the relay box is functioning correctly a Checking Relay Box Input Power 1 Connect power cord to table Plug the power cord into the 120 supply wa
15. 24VDC output to the components 5 2 Troubleshooting Notes The basic operation of each component will be defined along with a figure and anexplanation on how to check it out Certain defective components could cause the entire table to stop functioning or only one control function to stop It would depend on what part of the component failed Other defective components would only cause one control function to stop The following defective components could cause all control functions to be affected a Motor Pump Assembly b Main Switch Circuit and Wiring c Pendant control The following defective components could cause all control functions to be affected or only one control function a Relay Box b Pendant Control c Auxiliary Switches The component listed below would only affect one control function Solenoid When troubleshooting an electrical circuit start at the problem and work back to the power source NOTE Battery table troubleshooting should be gin by switching the operating mode For example if a function fails in the AC120V mode switch to the BATTERY mode If the function now operates the problemis probably located between the andthe relay box Ifthe function also fails in battery operation use the auxiliary switches If the function now operates the problem is probably in the pendant control connectors or wiring from the pendant control to the relay box connector pins ar
16. ALVE SPEED ES 22 CONTROL MINI VALVE INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO RESERVOIR 3 7 BACK SECTION DIAGNOSIS CHART Reason Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Kidney Bridge Raised Loose Retaining Hardware Microswitch out of adjustment Loose Table Top Defective or Dirty Check Valves Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil BACK SECTION CYLINDER DOWN CIRCUIT FLEXIBLE HOSE 82205 305 Figure 3 5 Back Section Circuit 3 8 LEG SECTION DIAGNOSIS CHART Page 27 Problem Reason Leg function moves improperly Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Loose Retaining Hardware Microswitch out of adjustment Loose Table Top Leg function chatters or loses position Defective or Dirty Check Valves Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil LEG SECTION CYLINDER NOTE ONE SIDE SHOWN FOR CLARITY PLUMBING TERMINAL COPPER LINE CHECK VALVE SPEED CONTROL FLEXIBLE MINI VALVE HOSE INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO R
17. Down Open When table is in Reverse Trendelenburg Position NS 2 hrings the top back to level 091305 04 Figure 5 23 Trendelenburg Return Switches NS 4 NS 3 CN10 YELLON s noon LIGHT BLUE a LIGHT BLUE 23 GREEN ten NS 3 LATERAL TILT LEFT NS 4 LATERAL TILT RIGHT TEST AT PINS 3 amp 23 TEST AT PINS 4 amp 23 Table Position Switch Position Meter Reading Table Position Switch Position Meter Reading Level Open Infinity Infinity Tilt Right Open Infinity ilt Ri 0 Tilt Left Closed 0 ilt Infinity When table is in Tilt Left Position When table is in Tilt Right Position 091305 05 NS 3 brings the top back to level NS 4 hrings the top back to level Figure 5 24 Lateral Tilt Return Switches CN10 RD RED TM1 6 5 PINK pink TM1 8 CN10 127 RED WHITE NS 5 BACK SECTION DOWN NS 6 BACK SECTION UP TEST AT PINS 5 amp 24 TEST AT PINS 5 amp 6 Table Position Switch Position Meter Reading Table Position Switch Position Meter Reading Level Closed Level Open Infinity Back Down Open ae Back Down Open Infinity Back Up Closed 0 Back Up Closed 0 When the Back Section is Down NS 5 brings the Back Section When the Back Section is Up 091305 06 Up to level and will not allow Top Slide toward foot NS 6 brings the Back Section Down to level Figure 5 25 Back Section Return Switches
18. ELLOW 6 WHITE 82205 507 BASE END Test Leads Base Conn Pend Conn Pin Pin Base Conn Pend Conn i Pin 1 6 2 1 Figure 5 7 Pendant Control Test Disconnect the cord from the table connector and from the pendant control connector and using an ohmmeter test the continuity between the corre sponding pins in the connectors b Test Results If you do not receive the correct readings the wiring or connector pins may be faulty c Table Connector HN8 Test If correct readings are received test the wiring from the table connector to connector CN7 at the Relay Box Disconnect connector CN7 from the Relay Box and using an ohmmeter test the continuity between the corresponding pins in connectors CN7 and the table connector HN8 See figure 5 8 CN7 lt LT GREEN WHITE a i 82205 508 CN7 CONNECTOR HN8 CONNECTOR LT GREEN WHITE LT GREEN GREEN BLACK GREEN RED GRAY GRAY WHITE Figure 5 8 Table Connector Continuity Test d Test Results If the correct readings are not obtained test the wiring from the table connector HN8 to connector HN7 located behindthe Pendant Connector Hous ing and from connector CN7 to HN7 Disconnect connector HN7 and using an ohmmeter test the continuity between the corresponding pins in con nectors HN7 to CN7 and HN7 to HN8 Refer to figure 5 8 If the correct readings are obtained this part of the circuit is okay and the proble
19. ESERVOIR 82205 306 Figure 3 6 Leg Section Circuit 28 3 9 SLIDE DIAGNOSIS CHART Problem Reason Slide function moves improperly Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valve Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Loose Retaining Hardware Microswitch out of adjustment Loose Table Top Slide function chatters or loses position Defective or Dirty Check Valve Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil SLIDE CYLINDER SLIDE CYLINDER TERMINAL E CHECK COPPER VALVE SPEED CONTROL FLEXIBLE MINI VALVE HOSE INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO RESERVOIR 82205 307 Figure 3 7 Slide Circuit 3 10 KIDNEY LIFT DIAGNOSIS CHART Page 29 Problem Reason Kidney Lift moves improperly Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valve Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Bypass Valve out of adjustment Kidney Lift chatters or loses position Defective or Dirty Check Valve Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil Lift Rods Binding BYPASS VALVE KIDNEY LIFT CYLINDER KIDNEY LIFT CYLINDER w DOWN CIRCUIT N U
20. GNOSIS CHART 2r 3 9 SLIDE DIAGNOSIS CHART am 28 3 10 KIDNEY LIFT DIAGNOSIS CHART 29 311 CIRCUIT DIAGNOSIS Ex ONERE unitas ei 30 3 12 Flexible Hose Identification and 31 3 13 Kidney ESI EE EE E eee ee eer eee 32 SEC TION IV ELECTRICAL SYSTEM 34 omm 34 COMPONENTS uuu 0 EE E EEE 34 SECTION V ELECTRICAL TROUBLESHOOTING 36 55i 2 1072 22 eee cee u u ener ee ee eee S 36 5 2 roubleshopting CDD D 36 Main UR RU MEE 36 v Wc u u E usta aa amsa usasqa 37 5 5 Capacitor Rectifier AC120V Transformer r 38 5 6 Pendant COMO sa nig Yasqa 39 5 7 Auxiliary 41 5 8 Relay BOX Si mee en 42 5 9 Main Wire Harness Continuity 44 5 10 qo e err AN E EER 45 5 11 Motor PUMP Assembly aun E REE ENTER 46 5 12 Return to Level Positioning Inhibit Micro Switches
21. OFF both BATTERY and AC120V operating modes 2 Use an ohmmeter to test for continuity between terminals 3 and 4 on the connector HN4 See figure 5 19 041905 018 Figure 5 19 Thermal Protector 3 The Thermal Relay should reset itself after approximately one minute 4 The Thermal Relay should activate after 1 1 2 to 2 minutes of continuous pump operation c Motor Resistance Test The motor can be statically checked for resistance using an ohmmeter This test is not 100 accurate because you are checking the motor with very low voltage from the meter and without any load 1 Using an ohmmeter Rx 1 scale measure the resistance between the pins 1 and 2 of HN4 See figure 5 20 2 The meter should read 1 to 2 ohmsatroom temperature 3 Measure the resistance between either pin and ground 4 Meter should read infinity 041905 019 Figure 5 20 Motor Connector 4 d Test Results If you do not receive the correct meter readings the motor or wiring is defective 5 12 Return to Level Positioning Inhibit Micro Switches The return to level feature is activated by a single button on the pendant control and automatically levels the major table functions lateral tilt Trende lenburg back section and leg section The kidney lift has a back section up inhibit switch to prevent the table back section from damaging the kidney lift when the lift is raised The back section still has the capability to
22. P CIRCUIT PLUMBING TERMINAL CHECK 2 SPEED CONTROL INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO RESERVOIR 82205 308 Figure 3 8 Kidney Lift Circuit 30 3 11 BRAKE CIRCUIT DIAGNOSIS CHART Problem Reason Brakes will not set properly Emergency Brake Release Valve Open or Defec tive Spool Valve Not Centered NOTE Defective Check Valve Low on Oil If brakes have been released with the Pressure Relief Valve Not Set Properly Emergency Brake Release Valve Pinched Hose brakes will not reset until BRAKE UN Defective Mini Valve LOCK Circuit has been activated Defective Relay Box or Pendant Control Loose Retaining Hardware Brakes Will Not Stay Locked Emergency Brake Release Valve Open or Defec tive Defective or Dirty Check Valve Oil Leakage in Circuit Leaking O Ring Inside Cylinder Brakes will not retract properly Incorrect Speed Adjustment Defective Check Valve Spool Valve Not Centered Defective Mini Valve Pinched Hose Defective Solenoid or Wiring Defective Relay Box or Pendant Control Defective Brake Cylinder BRAKE 4 CYLINDER RETURN TO RESERVOIR BRAKE PLUMBING CYLINDER FLEXIBLE Li ia HOSE w SS SPEED RETAINING gt HARDWARE CYLINDER l G EMERGENCY BRAKE sh LERSE fj CYLINDER 82205 309 Figure 3 9 Brake System Circuit 3 12 Flexible Hose Identification and Placement The flexible hydraulic hoses used in the table are number c
23. PURPLE TM2 26 CN10 091305 03 Figure 5 22 Return Inhibit Micro Switch Test a Switch Test Turn Main Power ON lock the table brakes and place the table top sections in a level position with the Kidney Lift down Disconnect connector CN10 from the relay box and using an ohmmeter test the wiring and switch operation at the appropriate pin numbers for the micro switch in question as shown in figures 5 23 through 5 30 Page 49 NOTE If you do not receive the proper continu ity results at connector CN10 it does not necessarily mean the micro switch is defective There could be a problem with the riser cord between connectors CN10 HN10 and HN11 terminal strips TM1 and TM2 or in the wiring from the switch to connector Further tests will NOTE have to be made to determine the exact problem Be sure to isolate the circuit when mak ing continuity checks NS 1 CN10 23 LIGHT BLUE TM1 5 LIGHT BLUE 25 su BLUE NS 1 TRENDELENBURG HEAD DOWN TO LEVEL TEST AT PINS 1 amp 23 Table Position Switch Position Meter Reading Level Head Up Head Down Open Infinity Open Infinity Closed 0 When table is in Trendelenburg Position NS 1 hrings the top back to level NS 2 REVERSE TRENDELENBURG HEAD UP TO LEVEL TEST AT PINS 2 amp 23 Tahle Position Switch Position Meter Reading Level Open Infinity 0 Infinity Head Up Closed Head
24. SECONDARY PISTON O RING FLEXIBLE HOSE 82205 301 Figure 3 1 Elevation Circuit 3 4 TRENDELENBURG DIAGNOSIS CHART Problem Trendelenburg function moves improperly Trendelenburg function chatters or loses position TRENDELENBURG CYLINDER PLUMBING TERMINAL COPPER LINE CHECK VALVE SPEED CONTROL INTERNAL OIL FROM PUMP INTERNAL OIL RETURN TO RESERVOIR Page 23 Reason Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid or Wiring Defective Relay Box or Pendant Control Worn Ball Joint and Retainer Nut Defective or Dirty Check Valve Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil FLEXIBLE HOSE 82205 302 Figure 3 2 Trendelenburg Circuit 24 3 5 LATERAL TILT DIAGNOSIS CHART Problem Lateral tilt function moves improperly Lateral tilt function chatters or loses position Reason Incorrect Speed Adjustment Spool Valve Not Centered Defective Check Valves Low on Oil Pinched Hose Defective Mini Valve Pressure Relief Valve Not Set Properly Defective Solenoid Defective Relay Box or Pendant Control Defective or Dirty Check Valves Oil Leakage in Circuit Air Inside Cylinder Pinched Hose Low on Oil LATERAL TILT CYLINDER PLUMBING TERMINAL COPPER SPEED CONTROL 552
25. TION A When disconnecting any of the hydrau lic lines fittings joints hoses etc for the following control functions be sure these table surfaces are in their down position or completely supported Elevation Back Section Leg Section Kidney Lift When working on the Trendelenburg or lateral tilt hydraulic circuits be sure to support the table top When working on the brake system make sure the brakes are completely retracted A WARNING A Failure to follow these precautions may result in an uncontrolled oil spray and damage to the table or personal injury 3 2 Troubleshooting Notes When troubleshooting a table malfunction first determine the following 1 Does the problem affect all control func tions 2 Does the problem affect only one control function 3 Ifthe problem affects one control function is it in both directions 4 Is the problem intermittent 5 Is the problem no movement of a table surface or does the table surface lose position Page 21 Once the problem has been determined concen trate on that particular hydraulic circuit or control function Listed below are the hydraulic components that are common with all hydraulic circuits If there is problem with any of them it could affect all control functions 1 Motor Pump Assembly 2 Reservoir 3 Pressure Relief Valve 4 Certain Oil Lines and Galleys Ifthere was a problem in the following components only one control func
26. al slide CS 1 will not allow Back Section CS 2 will not allow Leg Section to to Head is limited to 772 from center When to go below horizontal go more than 45 below horizontal slide to Head is more than 772 from center Leg Section will not go below horizontal 091305 08 Figure 5 27 Leg Down Back Down Inhibit Switches 52 CN10 NC 2 ORANGE E 277 ORANGE er NO 6 PURPLE PURPLE T M NC CN10 z PN 2 PINK WHITE 25 LS 1 s N0 PINK WHITE MU Bo PEWNE B W HN10 1 BLUE WHITE 17 CS 3 BACK UP INHIBIT LS 1 BACK UP INHIBIT TEST AT PINS 11 amp 26 TEST AT PINS 17 amp 25 Table Position Switch Position Meter Reading Table Position Switch Position Meter Reading Kidney Lift Down Open Infinity Back Up lt 90 Open Infinity Kidney Lift Up Closed 0 Back Up 90 Closed 0 When Kidney Lift is Up CS 3 will not allow Back Section to go LS 1 limits Back Section travel to 90 above horizontal 09105 09 more than 45 above horizontal Figure 5 28 Back Up Inhibit Switches CN10 PURPLE _ __ WH PURPLE 5 4 m Bc BROWN WHITE 2 EIz3 BROWN WHITE CS 4 SLIDE INHIBIT TEST AT PINS 8 amp 26 Table Position Switch Position Meter Reading Level Open Infinity Leg Down Closed 0 When the Leg Section is more than 45 below horizontal CS 4 will not allow Top to slide toward Head 091305 10 Fi
27. al system mi BRAKE BRAKE EMERGENCY BRAKE RELEASE VALVE OTOR PUMP ASSEMBLY Figure 1 15 Brake System Block Diagram 82205 115 Each corner of the cast iron table base has a hydraulic brake cylinder These single action cyl inders are hydraulically connected in parallel to the mini valve and all four are activated together It is normal for one corner ofthe table to raise before the others due to the weight distribution of the table An electronic timer in the relay box is activated when any function on the pendant control is pushed momentarily The pump motor and brake system mini valve are activated and the brake cylinders are completely set The electronic timer runs for approx 8 10 seconds The brakes are released by pushing the BRAKE UNLOCK button momentarily An electronic timer in the relay box activates the brake function hy draulic mini valve and pump motor 14 When activated the return hydraulic circuit oper ates similar to the elevation cylinder return circuit Return springs inside the single action brake cylin ders retract the brake pads and provide the pres sure to return the hydraulic oil back to the reservoir The electronic timer operates the return circuit for approximately 8 10 seconds g Emergency Brake Release The emergency brake release is simply a manually operated bypass valve connected in parallel to the brake
28. be lowered and raised but will not raise more than 45 above horizontal until the kidney lift is completely down If the back section is raised more than 45 above horizontal the system will not allow the kidney lift to be raised An audible alarm will sound if the kidney lift inhibit switch is activated and either function is activated raising back section when Kidney lift is up or raising kidney bridge when back section is above horizontal The slide function has inhibit switches to prevent damage to the back and leg sections If the back section is below horizontal the top will not slide toward the foot end If the leg section is lowered more than 45 below horizontal the top will not slide toward the head end Likewise if the top is slid Page 47 toward the foot end the back section will not go below horizontal If the top is slid toward the head end the leg section will not go more than 45 below horizontal The return to level positioning inhibit system con sists of 15 micro switches 3 electrical connectors 2 terminal strips and the related wiring The micro switches are mounted on or adjacent to the func tion they control and are wired for normally open or normally closed operation The micro switches are either cam or lever actuated and can be adjusted at the individual switch mounting brackets Proper microswitch operation depends on all top sections being properly secured Check top section fasten ers The
29. c Tite Lubricate Casters Check brake pads for wear and inspect brake cylinders for proper operation Inspect the Trendelenburg Cylinder amp Ball Joint Retainer Nut A Only facility authorized Skytron trained maintenance personnel should troubleshoot the Skytron 3600B Surgical Table Trouble shooting by unauthorized personnel could result in personal injury or equipment damage How to contact us SKYTRON 5000 36th St SE Grand Rapids MI 49512 PH 1 800 759 8766 SKY TRON FAX 616 957 5053 4 EQUIPMENT LABELS AND SPECIFICATIONS INDICATES DANGEROUS VOLTAGE 120 V 60 Hz CLASS DEFIBRILLATION PROOF TYPE B EQUIPMENT IPX4 RATED INTERNALLY POWERED EQUIPMENT EQUIPMENT PROTECTIVE GROUNDING IN ORDER TO ENSURE PROPER GROUNDING RELIABILITY THIS TABLE MUST BE CONNECTED TO A PROPERLY GROUNDED HOSPITAL GRADE OUTLET N CONNECTION FOR NEUTRAL CONDUCTOR SUPPLIED UNIT TO BE USED ONLY IN SPECIFIED ENVIRONMENTAL CONDITIONS TEMPERATURE 15 30 60 85 F HUMIDITY 30 60 RELATIVE HUMIDITY NON CONDENSING VOLTAGE IPX4 ENCLOSURE CLASS V VOLTAGE RATING OF THE UNIT A AMPERAGE RATING OF THE UNIT HZ FREQUENCY OF THE UNIT A ATTENTION CONSULT MANUAL FOR FURTHER INSTRUCTIONS INDICATES SPECIAL USER ATTENTION POWERED BY AC VOLTAGE POWERED BY BATTERY BATTERY TYPE SEALED LEAD ACID 12V VALVE REGULATED 16AH 10HR 530W 10MIN 15 AMP INTERNAL CIRCUIT BREAKER
30. ct the tightness of the ball joint collar and the locking allen bolt See figure 2 4 Also inspect the ball socket for signs of wear or metal particulate Lubricate peri odically using a white lithium based grease BALL JOINT COLLAR ALLEN BOLT TRENDELENBURG lt CYLINDER 82106 101 Figure 2 4 Trendelenburg Cylinder 2 3 Head Section Adjustment The head section can be adjusted to eliminate any flexing throughout it s range of travel To adjust Place the head section in level position and remove the top See figure 2 5 Loosen but do not remove the allen bolts securing the bearing block to the frame Loosen the allen bolt in the top of the frame and turn the set screw as required to achieve proper adjustment One or both of the blocks may require adjustment to achieve proper alignment Tighten all allen bolts when adjustment is com plete Test the head section throughout its range of travel Re adjust as needed Replace top section when proper adjustment is achieved ADJUSTMENT SET SCREW ALLEN 82205 205 Figure 2 5 Head Section Adjustment 2 4 Slide Roller Adjustment The pivot pins on the slide rollers are eccentric cams The rollers can be adjusted if required to maintain proper top slide operation To adjust Remove the Seat section top the hose cover and the right and left lateral tilt frame covers for access to the top rollers 1 Align the table top so the rollers to be adjusted are conta
31. cting the slide bars 2 Loosen the adjustment cam set screw and adjust the roller using an 8mm Allen wrench See figure 2 6 To avoid any possible binding in the slide mechanism adjust the roller on the opposite side of the table in the same manner cam turned toward same end of table on each side 3 Lubricate rollers and slides with white lithium based grease 4 Adjust rollers so top slides smoothly with no up or down movement of the table top 5 When adjustment is complete tighten set screws replace covers and top section SLIDE SET SCREW 8mm ALLEN WRENCH 82205 206 Figure 2 6 Page 19 2 5 Side Rails Inspect each of the side rail sections Make sure that all retaining hardware is tight Inspect the gravity stops Make sure that each gravity stop moves freely Clean lubricate or replace as neces sary See figure 2 7 T SIDE 0 RAIL T GRAVITY STOP 82106 102 Figure 2 7 2 6 Casters Clean and lubricate each of the casters Remove any debris caught in the casters and old grease Lubricate using a grease gun and conventional wheel bearing grease The casters should rotate freely providing a smooth movement of the table during positioning Replace worn or defective cast ers as required 20 SECTION HYDRAULIC TROUBLESHOOTING 3 1 Precautions Before attempting to troubleshoot any hydraulic problem on the table please read through the pre cautions and notes below A CAU
32. e neutral position the speed control does not affect anything OIL LINE OIL LINE SPEED CONTROL OIL GALLERY PRESSURE OIL RETURN SPOOL RETURN X VALVE SOLENOID PISTON Figure 1 5 Mini Valve in Neutral Position 10 Mini Valve Right Port Activated See figure 1 6 Right Mini Valve Port is Supply Line Left Mini Valve Port is Return Line INLET 2 m OUTLET 82205 106 Figure 1 6 Mini Valve Right Port Activated e Spool Valve Pushed to the left by electric solenoid This opens the internal oil pressure galley allowing the fluid to go through the check valve and on to the cylinder Also the spool valve opens the oil return line providing an oil path through the internal oil galley back to the reservoir Pilot Plunger Valve Left pilot plunger valve is pushed up by the incoming oil pressure mechani cally opening the check valve located above it in the return circuit This action allows the oil from the return side of the slave cylinder to go back into the reservoir The right pilot plunger valve is not affected in this operation mode e Check Valves Both check valves are opened in this operation mode The right check valve is pushed open by the oil pressure created by the pump Theoilthen continues through the lines and supplies the inlet pressure to move the slave cylinder piston The left check valve is held open mechanicall
33. e numbered usually with very small numbers Ern SKYTRON 9 w SECTION V ELECTRICAL TROUBLESHOOTING 5 3 Main Switch The main power supply 120 60 HZ comes in through the power cord and through the Power Switch The Power Switch opens both lines when in the OFF position The Power Switch is also a 10 Amp circuit breaker that is used to protect the complete electrical system a Main Switch Test The following test will determine if line voltage is applied to connector HN1 which in turn would supply 120VAC power to the table 1 Plug the power cord into the 120VAC supply wall receptacle and turn the main switch ON 2 Disconnect connector HN1 See figure 4 1 Leave all other connectors connected A CAUTION A Line voltage 120 VAC will be mea sured in this test Do not touch uninsu lated connector pins or meter test leads 3 Use an AC voltmeter capable of measuring 120 VAC and measure the voltage between pins 1 and 2 black and white wires located in connector HN1 See figure 5 1 You should receive line voltage 120 VAC 82205 501 Figure 5 1 Connector HN1 Test b Test Results If the correct voltage is obtained everything is good up to this point and the problem would have to be in another area If you do not receive the correct measurements the problem would have to be in the wires Power Switch Power Cord or main electrical Power Cord connector 3 pin twist lock connecto
34. ecialized equipment If all tests have been conducted and it appears that the Relay Box is faulty contact SKYTRON 44 5 9 Main Wire Harness Continuity Tests If correct meter readings are not received in tests between components before replacing the com ponents test the Main Wire Harness to be sure all connectors and wires are making a good connec tion a CN4 to Batteries Test 1 Disconnect connectors CN4 and the and connectors from the batteries Leave all other connectors connected 2 Using an ohmmeter test for continuity between pin 1 of CN4 and battery connector Also test between pin 2 of CN4 and battery connector See figure 5 14 RED L BLUE 82205 513 Figure 5 14 NOTE The 15 amp battery protection circuit breaker is in the line between CN4 pin 1 and the battery connector Test the continuity of the circuit breaker if cor rect meter reading is not received b CN4 to Pump Test 1 Disconnectconnectors CN4 and HN4 Leave all other connectors connected 2 Using an ohmmeter test for continuity be tween the pins of CN4 andpins on HN4 See figure 5 15 WIRE COLOR PIN NUMBER CODES CN4 RED 3 BLACK 4 WHITE 7 WHITE 8 82205 514 Figure 5 15 c CN4 to Capacitor Rectifier Unit Test 1 Disconnect connectors CN4 and Leave all other connectors connected 2 Using an ohmmeter test for continuity between pins of CN4 and HN3 See fig
35. ee figure 5 3 5 Meter should read 12VDC 1VDC Figure 5 3 b Test Results A reading of 11 volts or below indicates the battery needs charging After batteries have been fully charged repeat the full load test If either battery s voltage drops below 11VDC it should be replaced 38 5 5 Capacitor Rectifier 120 Transformer The Capacitor Rectifier Unit contains the battery charging system as well as the components for AC120V operation except the transformer a Transformer Test 1 Confirm 120VAC input at HN1 using Main Switch test in 5 3a 2 Connect HN1 disconnect HN2 brown and red wires and using an AC voltmeter test the transformer output at HN2 See figure 5 4 3 Meter should read 22VAC 82205 504 Figure 5 4 Connector HN2 Test b Test Results If the correct voltage is obtained everything is good up to this point and the problem would have to be in another area If you do not receive the correct measurements the problem may be in the wires connectors or transformer The transformer is located in the rear of the base under the stainless steel base cover The stainless steel cover will have to be discon nected and lifted from the base for access to the transformer for further testing c Capacitor Rectifier Unit Test 1 Make sure all connectors are connected connect the power cord and turn AC120V operation ON Test connectors HN2 and using a voltme te
36. gure 5 29 Slide to Head Inhibit Switches 53 CN10 12 ORANGE WHITE ORANGE WHITE NO amp CS 5 9 PINK PINK CS 5 KIDNEY LIFT INHIBIT TEST AT PINS 12 amp 24 Table Position Switch Position Meter Reading Back Up lt 45 Open Infinity Back Up gt 45 Closed 0 When the Back Section is more than 45 above horizontal CS 5 will not allow Kidney Lift to operate 091305 11 Figure 5 30 Kidney Lift Inhibit Switches b Switch Adjustment If proper readings are not obtained during test or if table does not properly return to level check the tightness of the fasteners to make sure the sec tions are secure and use the following procedure to adjust the switches 1 Apply table brakes and using a level level the table top using the TRENDELENBURG and LATERAL TILT function buttons on the pendant control 2 Carefully loosen the allen bolts securing the switch bracket and adjust the switches as needed See figure 5 31 MICRO SWITCH BRACKET Ok ALLEN BOLTS lt CN WASHERS I MICRO SWITCH 82205 530 Figure 5 31 Micro Switch Adjustment 2 7 7 R Y FIG S HE A N 5000 36th Street S E Grand Rapids MI 49512 1 800 SKYTRON 1 616 957 0500 FAX 1 616 957 5053
37. ion cylinders are closed at one end and have a movable piston with hydraulic fluid on both sides Connected to this piston is a ram or shaft that exits out of the other end of the cylinder Through the use of a ball and socket a gear clevis and pin arrangement this ram is connected to a movable table surface The movable surface can be moved one way or the other by pumping hydraulic fluid into the cylin der on either side of the piston Obviously if oil is pumped into one side of the cylinder a return path must be provided for the oil on the other side See figure 1 8 BACK O RING RAM PISTON SECTION c j ge E PIE NY HYDRA LINE 82205 108 Figure 1 8 Back Section Cylinder 2 Slide Cylinder Assembly The longitudinal slide system utilizes two double action cylinders working in tandem The cylinder housing contains two piston and ram assemblies facing in opposite directions One ram is connected to the table top Page 11 and the other is attached to the elevation column Hydraulic fluid is pumped into the same end of both cylinders at the same time The two cylinder system allows the 23 inches of top slide to be performed a short cylinder system See figure 1 9 PISTON RAM A 4 tan Hb RAM PISTON 82205 109 Figure 1 9 Slide Cylinder Assy 3 Lateral Tilt Assembly The lateral tilt assem bly consists of two cylinders pistons
38. is needed remove the filler vent cap with a phillips screwdriver and add fluid through this opening using a funnel See figure 1 18 NOTE The elevation cylinder should be com pletely down the brakes released and all the other control functions in their neutral position when checking oillevel FILLER CAP e FITTING 82205 11 The type of oil that should be used is Mobil DTE 25 or equivalent This is a very high quality hydraulic oil The table requires approximately two quarts of oil to operate properly Excercise caution when determining equivalance to avoid damage to the hydraulic system OIL TANK lt RESERVOIR Figure 1 18 b Bleeding The Hydraulic System To purge the air from the hydraulic system operate each function back and forth at least two or three times NOTE Whenever a hydraulic line or compo nent is replaced bleed the air out of the lines using the pump pressure by acti vating the function before making the final connection Then operate the func tion until it stalls in both directions Page 15 c Pressure Relief Valve The pressure relief valve is adjusted by turning the adjustment nut until the desired pressure is reached To adjust 1 Remove the plumbing bolt securing the brake system line to the pressure relief valve and attach a hydraulic pressure gauge to the main oil galley using along 6mm plumbing bolt See figure 1 19 PRESSURE GAUGE PRESSURE g
39. ition See figure 2 2 Tighten the set screws and replace the seat section top when the adjustment is com pleted BACK SECTION SEAT SECTION SET SCREW BACK SECTION CYLINDER ECCENTRIC CAM 82205 202 Figure 2 2 Back Section Adjustment 18 b Leg Section Position the leg section all the way up Both sides of the leg section should stop moving at the same time and should not show any signs of twisting Any twisting or flexing of the leg section as it approaches the stalled position indicates that one of the cylinders is not reaching its fully extended position at the same time as the other and an adjustment is required To adjust Loosen the cam locking set screws located inside the table side frames See figure 2 3 Use an allen wrench to turn the cylinder eccentric cams as required to shift either cylinder fore needed so no twisting or flexing of the leg section is observed when it is stalled in the above horizontal position Tighten set screws when proper adjust ment is achieved LEG SECTION LEG SECTION CYLINDER ECCENTRIC CAM 82205 203 Figure 2 3 Leg Section Adjustment c Trendelenburg Cylinder Ball Joint Inspect the Trendelenburg ball joint on a periodic basis Check for play of table top by sliding the table top to each extremity and applying a load Observe for any movement in the joint No visible play is permitted If movement is observed inspe
40. its The elevation circuit operation within the mini valve is identical to the operation of the four way valves previously described inlet pressure opens the check valve allowing the oil to enter the cylinder In the return position inlet pressure pushes the pilot plunger up and opens the return check valve See figure 1 14 The open check valve allows apath for the oil in the elevation cylinder to return to the reservoir When the pilot plunger valve is opened the continuing pump pressure opens the pressure relief valve which provides a return oil path to the reservoir The mini valve used in the elevation circuit con tains only one check valve all four way mini valves use two check valves The check valve is used to trap the oil in the elevation cylinder thereby sup porting the table top When the top is being lowered the check valve is mechanically held open by the pilot plunger through pump pressure zer s TO RESERVOIR THROUGH _ Tu RETURN TO PRESSURE RELIEF RESERVOIR 5 Figure 1 14 Elevation Return Circuit f Brake System The brake system consists of the following compo nents figure 1 15 1 Single action slave cylinders 4 each 2 3 way single check valve type mini valve Page 13 3 Manually controlled emergency brake re lease 4 Plumbing terminal flexible hoses copper lines and O rings 5 Portions of the electric
41. ll receptacle Disconnect connector CN4 leave all other connec tors connected 2 Using a DC voltmeter test input power for both the BATTERY and AC120V operating modes See figure 5 11 Meter should read approximately 24 28 volts b Test Results If you do not receive the correct meter readings the problem is in the input wiring connectors or components If the correct readings are obtained proceed to the next step BATTERY MODE TEST main power OFF 1 RED 4 2 BLUE AC120V MODE TEST main power ON 5 PURPLE 4 6 7 WHITE 8 WHITE 9 YELLOW 10 GRAY 11 ORANGE 12 82205 511 Figure 5 11 Relay Box Input c Checking Output to Pump 1 Make sure all connectors are connected and activate the AC120V operating mode See figure 5 12 82205 517 Figure 5 12 2 Test HN4 at pin 1 and pin 2 with aDC voltmeter Meter should read approximately 24 28 volts when any function button is activated If no voltage is present use an ohmmeter to test the continuity from HN4 to CN4 red and black wires d Checking Output to Solenoids This test checks the voltage that is used to energize the solenoids 1 Activate either BATTERY or AC120V oper ating mode NOTE eThe Brake Lock function is activated by pressing any function button except BRAKE UNLOCK Atimer inthe Relay Box allows continuous output for about 7 seconds If the brakes are already locked no
42. lve is provided in a 3 way mini valve 4 Speed Controls There are two speed controls in each 4 way mini valve They are needle valve type controls which restrict the volume of oil returning back into the reservoir thereby control ling the speed of the table surface movement A 3 way mini valve has only one speed adjustment The speed controls are always located in the return oil circuitto allow the movement of the cylinderto be controlled Also by using this control method it does not matter what size cylinder and piston is used because the speed is controlled by restricting the return oil If the pump puts out more volume to Page 9 a slave cylinder than is allowed by the speed control the pressure relief valve opens and pro vides an alternate path for the pump oil to return to the reservoir The following material depicts the three operating positions of the mini valve The movement of the slave cylinder piston extend or retract is deter mined by which port of the Mini Valve is activated Mini Valve in Neutral Position No fluid flow See figure 1 5 e Spool Valve Centered This closes off both oil pressure and oil return galleys Pilot Plungers Both Closed The pilot plung ers control the opening of the check valves If they are closed the check valves must be closed Check Valves Both check valves are closed trapping the oil in the cylinder and oil lines e Speed Control When the mini valve is in th
43. m may be the Pendant Control or the Relay Box Contact SKYTRON if all tests performed indicate that the problem is located in the Pendant Control 5 7 Auxiliary Switches The following tests will determine if the auxiliary switches are functioning properly a Switch Test Disconnect connector CN2 at the Relay Box and using an ohmmeter check for continuity at the connector pins pin 1A common while activating the appropriate switch See figure 5 9 Meter should read 0 ohms LLL sw D TABLE UP eee zy TABLE DOWN TREND sw W 4 1 TREND TILTRIGHT 1 TIT LEFT LLL sw3 7 BACK UP F BACK DOWN E 8 SW4 KIDNEY DOWN T qa BRAKE LOCK 14 sws LEG UP LEGDOWN M qa PUMP MOTOR swe GROUND 41 b Test Results If proper meter readings are not received test the individual switches as necessary Using an ohmme ter test the operation of an individual switch with the test lead at the center terminal of the switch and the test lead at the terminal opposite the direction of the switch actuation Refer to figure 5 10 Meter should read 0 ohms If the switches check out the problem would have to be in the wires the switch circuit board
44. micro switches operate on low voltage and control the function circuits pump motor and ap propriate solenoid valves when activated by the pendant control LEVEL button The micro switches are wired to the relay box through a riser cord and to the 26 pin connector CN10 See figure 5 21 for switch location and identification NS 7 LS 1 i N N HEAD SECTION SECTION c 15 2 ES 2 05 1 5 5 csa S 091305 02 TRENDELENBURG REVERSE TRENDELENBURG TILT LEFT TILT RIGHT BACK DOWN TO LEVEL SLIDE INHIBIT BACK UP TO LEVEL LEG DOWN TO LEVEL LEG UP TO LEVEL SLIDE LEG DOWN INHIBIT SLIDE BACK DOWN INHIBIT Figure 5 21 KIDNEY BACK 45 UP INHIBIT LED DOWN 45 SLIDE INHIBIT BACK UP 45 KIDNEY UP INHIBIT BACK UP 90 LIMIT SLIDE TO FOOT LIMIT 48 5 13 Micro Switch Troubleshooting If a problem is suspected in the return positioning circuits disconnect the connector CN10 from the Relay Box to eliminate the circuits Ensure that all table functions operate properly using the Pendant Control If the functions do not work properly using the Pendant Control refer to the appropriate test section and make all needed repairs before w
45. ned in this operation mode The left check valve is pushed open by the oil pressure created by the pump The then continues through the lines and supplies the inlet pressure to move the slave cylinder piston The right check valve is held open mechanically by the pilot plunger and allows the oil from the return side of the slave cylinder to go through the mini valve back to the reservoir e Speed Control The left speed control output side does not have any effect in this operation mode because the oil is routed around the speed control through a bypass valve to the output port The right speed control controls the speed of the table function by restricting the flow of oil going back into the reservoir d Hydraulic Cylinders Slave Cylinders There are several different types of hydraulic cylin ders used in the table that activate the control functions With the exception of the elevation and brake cylinders all operate basically the same way The control functions are listed below Back Section 2 double action cylinders Leg Section 2 double action cylinders Trendelenburg 1 double action cylinder Lateral Tilt 1 double action cylinder Elevation 1 single action cylinder Kidney Lift 2 double action cylinders Brakes 4 single action cylinders Slide 2 double action cylinders 1 Trendelenburg Back Section and Leg Sec tion Cylinders The double act
46. oded to aid in the correct placement ofthe 200 9 7 BACK SECTION BACK SECTION PLUMBING m 8 LEG SECTION Page 31 hoses from the plumbing terminal to their respec tive hydraulic cylinders Figure 3 10 shows the correct placement of the flexible hydraulic hoses and their respective number codes BYPASS x VALVE _11 LEG SECTION 1180 320 SL KIDNEY LIFT KIDNEY LIFT V 8 r t PISA zs f 1 d ELEV Frew J MOTOR PUMP 290 ASSEMBLY 82205 310 Figure 3 10 Flexible Hoses 32 3 13 Kidney Lift System The Kidney Lift cylinders are connected series so that both cylinders operate simultaneously Hydraulic pressure on one side of the lead piston causes the piston to move The piston movement forces the hydraulic fluid on the other side of the piston through the system to the other cylinder This simultaneously activates the other piston A by pass valve is connected to the right cylinder assembly for initial setup and adjustment of the kidney lift system Refer to figure 3 9 for terminal location Use the following procedures to bleed or adjust the system if needed a Bleeding the System If the hydraulic lines or c
47. ork ing on the return circuits NOTE Itis normal for the back section to move up if the LEVEL button is pushed when connector CN10 is disconnected from the relay box All of the micro switches are connected to the relay box via a wiring harness and the micro switch riser cord using connectors CN10 HN10 HN11 and terminal strips TM1 and TM2 The terminal strips are located under the hose cover on the top of the elevation column Connectors HN10 and HN11 are located under the slider shroud in the same area as the hydraulic hoses Connector CN10 plugs into the relay box and is the most convenient location to make circuit continuity checks See figure 5 22 for connector pin locations NOTE Wire colors may vary however con nection from indicated pins on HN11 to pins on CN10 remain the same WHITE 1 1 Q ME 1 2 n 3 YELLOW TM1 3 ae 4 iiu 8 RED TM1 5 rmm TM1 6 BROWN TM2 1 a CS 4 BROWN WH TM2 8 2 BLACK 9 lt gt O PLACKWH 10 s 20 ORANGE TM2 11 5 0 Q ORANGE WH 12 LEGEND EF 25089 GREEN WH TM2 13 d 14 41 15 PEE Lu NST BLUEWH HN10 17 FC 5 HN11 18 19 20 T edi 4 22 8 LT BLUE TM1 23 8 PINK 1 24 PINK WH HN10 25
48. output is provided eThe BRAKE UNLOCK button activates another timer in the relay box which allows continuous output for the brake release function for approximately 7 seconds f the brakes are already released using the BRAKE UNLOCK button no output is provided 2 Test connectors CN1A and CN1B from the back while attached to the relay box All connec tors should be connected 3 Activate each ofthe pendant control buttons and measure the output voltage for the corre sponding connector pins with a DC voltmeter See figure 5 13 Meter should read 24 volts e Test Results If you do not receive the correct meter readings the relay box is defective and should be replaced Page 43 CN1A CONNECTOR CN1B CONNECTOR FUNCTION FUNCTION Table Up Back Up Table Down Back Down Trendelenburg Slide To Foot Re Trendelenburg Slide To Head Tilt Right Kidney Down Tilt Left x Kidney Up Reflex Leg Up Flex z Leg Down Brake Set Brake Unlock 82205 512 Figure 5 13 Solenoid Output Connectors NOTE Before deciding the relay box is de fective check the wires and pins in the connector blocks to make sure they are notloose or making a bad connec tion with their mate elf the battery power is ON and no table functions have been activated for 3 hours the power off circuit will interrupt the battery power f Checking Output to Pendant Control The output to the Pendant Control can not be tested without sp
49. ox 1 8 VDC See figure 5 6 Page 39 82205 506 Figure 5 6 5 6 Pendant Control The Pendant Control is part of the solid state multi plex logic control system The pendant control contains illuminated circuit board mounted switches anda micro processor The encoded output from the pendant control is serial bit stream logic The output signal is transmitted to the micro pro cessors in the relay box where the logic is decoded and the appropriate relays for the selected function are activated Pendant Control troubleshooting should begin by switching the operating mode of the table For example if a function fails when operating the table in the AC120V mode switch to the BATTERY mode If the function now operates the problem is not the pendant control and probably is a problem located between the power cord and the relay box If the function also fails when in battery operation use the auxiliary switches to operate the function If the function now operates the problem is prob ably in the pendant control connectors or wiring from the pendant control to the relay box 40 a Pendant Control Test There are some serviceable components within the Pendant Control The cord is detachable and can be tested for continuity between the pins onthe connectors Use the following procedure to test the pendant control cord See figure 5 7 i ll PENDANT END 2 BROWN 1 BLACK 3 RED BLUE e GREEN NIC Y
50. r Check the continuity from the power cord base connector through the switch and wiring to con nector HN1 Remove the power cord disconnect HN1 black and white wires and test as shown in figure 5 2 82205 502 Figure 5 2 Base Connectorto HN1 Continuity Test 5 4 Batteries The BATTERY operating mode is powered by two 12 volt batteries connected in series to provide the 24 volt operating power The battery system voltage should be 24VDC ata range of 22VDC to 26VDC If the battery charge level falls below 23 5 volts the BATTERY operation indicator on the pendant control will blink indicating that the batteries require recharging The built in charging system automatically keeps the batteries at the proper charge level when the AC120V oper ating mode is ON The charging system will oper ate while the table is being operated in the AC120V mode Page 37 a Battery System Test 1 Disconnect the main power cord and using a DC voltmeter test each individual battery at its terminals Meter should read 12VDC 1V 2 Toaccurately testthe batteries they mustbe tested underafullload Disconnectthe main power cord and make sure all other connectors are con nected 3 Turn BATTERY power ON and elevate the table to its full up position 4 Continue to press the TABLE UP button onthe pendant control so that the pump motor continues to run and using a DC voltmeter check the voltage drop of each battery individually S
51. r See figure 5 5 HN3 CONNECTOR WIRE COLORS 1 PURPLE 2 BLACK 3 YELLOW 4 GRAY 5 ORANGE 82205 505 Figure 5 5 Connector 2 Test connector HN2 at pins 1 red and 3 brown Meter should read AC23V 3 Test connector at pins 1 purple and 2 black ground Meter should read DC30V 4 Test connector at pins 5 orange and 2 black ground Meter should read DC27V d Test Results If you do not receive the correct readings the connectors wires or the Capacitor Rectifier Unit may be defective NOTE Normal charging time for a fully dis charged battery is approximately 8 hours e Charging Indicator Test Charging Indicator contains 10 LEDs 3 red 4 yellow and 3 green All Indicators illuminated indicates full charge Indicators flash when charging is in process The following list shows the battery charge level as indicated by the lighted LED s 3green 100 Fully charged 2green 89 1 green 78 4yellow 67 3 yellow 56 2 yellow 45 Needs Charging BATT indicator on pendant will flash 1 yellow 34 Needs Charging 3 red 23 Needs Charging poor performance 2 red 1296 Needs Charging intermittent performance 1 red 196 Needs Charging inoperable Main Power Switch must be ON and power cord attached and plugged into outlet for charging sys tem to operate Test output from relay box at CN3 pin 11 common andpin 1 lowestcharge meter should read appr
52. r type and the power cord is a three wire fifteen foot long removable UL listed cord with a three prong hospital grade plug SECTION IV ELECTRICAL SYSTEM 4 2 Components Refer to figure 4 1 for the relationship of the elec trical components a Wires Connectors Switches Fuse These provide the path for the various electrical circuits b Relay Box Contains the step down trans former full wave rectifier micro processor and relay switches The relay switches are activated by the pendant control signal to the micro processor and in turn energize the solenoids c Hand Held Pendant Control Contains circuit board mounted switches and a micro pro cessor which activate the relay box Operates on 5 VDC d Solenoids These electrically open and close the hydraulic ports of the mini valve to direct the fluid to the correct cylinders They operate on 24 volts e Motor Pump Assembly 24 VDC motor with internal thermal protection 35 PENDANT CONTROL HN10 HN11 i 0 D 1 1 1 000000 c BUZZER ATTERY MAIN INDICATOR COT n CONTROL CONNECTOR TWIST LOCK POWER CORD 091305 01 Figure 4 1 3600B Electrical Circuit Block Diagram 36 5 1 General The battery table components operate on 24VDC The internal charging system also incorporates the components to transform the 120VAC input to
53. rrangement compensates for any wear between the gears that might occur To adjust Loosen the cam locking allen set screw Use an allen wrench to rotate the eccentric cam See figure 2 1 Tighten the locking set screw when adjustment is complete WRENCH 82205 201 Figure 2 1 Eccentric Cam Adjustment 2 2 Hydraulic Cylinder Adjustment The hydraulic cylinder rams that control both the back and leg sections must move together so that these sections are not twisted when operated This is accomplished by the use of eccentric cams that move the cylinder bodies fore and aft to adjust their effective stroke NOTE Adjust gear mesh before adjusting ec centric cams for the back section Page 17 a Back Section Position the back section all the way up until it stalls Both sides of the back section should stop moving at the same time and should not show any signs of twisting Any twisting or flexing of the back section as it approaches the stalled position indicates that one of the cylinders is not reaching its fully extended position at the same time as the other This condition would require an adjustment To adjust Remove the seat section top for access to the cam locking set screws and loosen the set screws Use an allen wrench to turn the cylinder eccentric cams as required to shift either cylinder fore or aft as needed so no twisting or flexing of the back section is observed when itis stalled in the full up pos
54. t PLUMBING BOLT 82205 119 Figure 1 19 2 Raise the table top until the piston reaches the end ofits stroke and stalls Observe reading on pressure gauge and turn the adjustment nut clock wise toincrease oil pressure counterclockwise to decrease until desired reading is obtained Pres sure should be 8MPA 80 1138 PSI An erratic reading and or inability to adjust to the recommended setting may indicate the need for replacement of the pressure relief valve 16 d Speed Controls The speed controls restrict the volume of oil return ing back to the reservoir thereby controlling the speed of each control function All four way mini valves have two speed controls located in the ends of each valve body All three way mini valves have only one speed control One speed control adjusts one direction of a particular function and the opposite speed control adjusts the other direction They are adjustable by using a small straight blade screwdriver and turning the adjustment screw clockwise to de crease the speed and counterclockwise to increase the speed See figure 1 20 1 TABLE DOWN 9 BACK DOWN 2 TRENDELENBURG 10 FOOT DOWN 3 REVERSE TREND 11 FOOT UP 4 TILT RIGHT 12 KIDNEY UP 5 TILT LEFT KIDNEY DOWN 6 REFLEX SLIDE FOOT 7 FLEX SLIDE HEAD 8 BACK UP BRAKES 82205 120 Figure 1 20 Any control
55. tion would normally be af fected 1 Mini Valve 2 Slave Cylinder 3 Oil Lines NOTE Whenever a hydraulic line or compo nent is replaced bleed the air out of the lines using the pump pressure before making the final connection After all connections are tight cycle the control function back and forth two or three times to purge the remaining air from the system CAUTION A When installing new O rings use hy draulic oil or white lithium grease to thoroughly lubricate the O rings and cylinder Keep everything clean Each complete oil circuit is shown on the following pages When troubleshooting a particular function refer to the appropriate oil circuit diagram and the list of possible problems 22 3 3 ELEVATION DIAGNOSIS CHART Problem Reason Table will not elevate properly Pressure Relief Valve Not Set Properly Low on Oil Spool Valve Not Centered Defective Pump Defective Mini Valve Defective Solenoid or Wiring Defective Relay Box or Pendant Control Leaking Cylinder Hose Uneven Weight Distribution Table will not descend properly Incorrect Speed Adjustment Defective Check Valve Spool Valve Not Centered Galled Slider Assembly Defective Solenoid or Wiring Defective Relay Box or Pendant Control Uneven Weight Distribution Table loses elevation Defective Check Valve Leaking Mini Valve Loose Fittings Joints Hoses Leaking O Ring Inside Cylinder MAIN PLUMING COPPER TERMINAL LINE
56. tment If either of the kidney lift cylinders reaches the end of the down stroke before the other one an adjust ment is needed Use the following procedure to adjust the system 1 If the right side bottoms out before the left side open the by pass valve and activate KID NEY DOWN to align the cylinders 2 If the left side bottoms out before the right side activate KIDNEY UP to raise the cylinders When the cylinders are atthe full up position open the terminal and activate KIDNEY UP to align the cylinders Close the valve before lowering the cylinders 3 When the adjustment is complete make sure the cylinders are completely down activate KIDNEY DOWN and tighten the screw to close the valve 34 4 1 General The complete electrical system with the excep tion of the hand held pendant control and the return circuit micro switches is contained within the base of the table The pump motor and the hydraulic valves are controlled electrically with the pendant control The electrically operated functions are as follows ELEVATION Up and Down TRENDELENBURG Head up and down LATERAL TILT Right and left BACK SECTION Up and Down LEG SECTION Up and Down TOP SLIDE FLEX REFLEX KIDNEY LIFT Up and down LEVEL Return to level BEACH CHAIR BRAKE UNLOCK Brake release The power requirements are 120 VAC 60 Hz The main power on off switch is an enclosed DPST circuit breake
57. unctioning Mini Valves The operation of the mini valves is identical for all table functions except the elevation and brake circuits These two hydraulic circuits use a 3 way single check valve type mini valve All other func tions use a 4 way dual check valve type mini valve Either type mini valve is controlled by two pushing type electrically operated solenoids The sole noids push the spool valve located in the lower portion of the valve one way or the other This motion opens the main supply galley which has pump pressure allowing the oil to flow through the various parts of the mini valve to the function The spool valve also opens an oil return circuit which allows the oil to return to the oil reservoir The main components of the mini valve and their functions are listed below 1 Spool Valve Opens the main oil galley pump pressure to either mini valve outlet de pending on which direction the spool valve is pushed Also it provides a return path for the oil returning back into the reservoir 2 Pilot Plunger There are two plungers ina four way mini valve one in a 3 way mini valve one under each check valve The purpose of the pilot plungers is to mechanically open the return check valve allowing the oil to return back into the reservoir 3 Check Valve Two are provided in each four way mini valve to seal the oil in the cylinders and oil lines and prevent any movement of the table One check va
58. ure 5 16 82205 515 Figure 5 16 CN4 HN3 5 10 Solenoids The solenoids are energized by 24 volt potential that is controlled by the relay box The solenoid windings are protected from excessive heat by an internal thermal fuse that will open after approx 7 minutes of continuous operation The solenoid must be replaced if the internal thermal fuse has been blown The solenoids are mounted directly on either side ofthe hydraulic mini valves and push the spool valve in one direction or the other depending upon which solenoid is activated a Solenoid Test The resistance of the solenoid coil can be checked out using an ohmmeter R x 1 scale CN1A 12 5 6 9 10 13 14 Page 45 1 Disconnect connectors CN1A and CN1B Measure the resistance between the two pins at the connector forthe solenoid in question as shown in figure 5 17 Polarity of meter leads is not important 2 The meter should read approximately 16 ohms at room temperature 3 Measure the resistance between either pin and ground 4 Meter should read infinity b Test Results If the solenoid does not check out with the meter it is more than likely defective and must be replaced CN1B 2 15 16 11 12 5 6 19 20 Right LATERAL TILT LEG SECTION SECTION Reverse Trend 3 4 78 1112 15 16 CN1A KIDNEY BRAKE BLUE DOT Up Down 4 13 14 9 10 7 8 17 18 CN1B 1 5 9 13 SE PO Vana
59. y by the pilot plunger and allows the oil from the return side of the slave cylinder to go through the mini valve back to the reservoir e Speed Control The right speed control output side does not have any effect in this operation mode because the oil is routed around the speed control through a bypass valve to the output port The left speed control controls the speed of the table function by restricting the flow of oil going back into the reservoir yw m Bs Y F A Rx ON Mini Valve Left Port Activated See figure 1 7 Left Mini Valve Port is Supply Line Right Mini Valve Port is Return Line OUTLET 82205 107 Figure 1 7 Mini Valve Left Port Activated e Spool Valve Pushed to the right by electric solenoid This opens the internal oil pressure galley allowing the fluid to go through the check valve and on to the cylinder Also the spool valve opens the oil return line providing an oil path through the internal oil galley back to the reservoir Pilot Plunger Valve Right pilot plunger valve is pushedup by the incoming oil pressure mechani cally opening the check valve located above it in the return circuit This action allows the oil from the return side of the slave cylinder to go back into the reservoir The left pilot plunger valve is not affected in this operation mode Check Valves Both check valves are ope
60. ylinders have been discon nected from the kidney lift system for any reason use the following procedure to bleed the air from the system 1 Remove the kidney lift top section and begin the procedure with both pistons in the down posi tion chambers A amp C as shown in figure 3 11 2 Make sure the by pass valve is closed terminal screw tight and activate KIDNEY DOWN The hydraulic fluid will fill cavity D as shown in figure 3 11 RIGHT CYLINDER d KIDNEY LIFT DOWN 82205 311 Figure 3 11 3 Open the by pass valve by loosening the screw in the bottom of the terminal and activate KIDNEY UP Hydraulic fluid fills cavity A and pushes the piston into cavity B The open termi nal allows a path for air to escape from cavity B without affecting the piston in C See figure 3 12 KIDNEY LIFT 5 EY LIT 82205 312 Figure 3 12 4 Leave the by pass valve open and activate KIDNEY DOWN Hydraulic pressure keeps the piston in chamber C the hydraulic fluid passes through the equalization terminal and fills cavity B pushing the piston into cavity A See figure 3 13 RIGHT CYLINDER di KIDNEY LIFT DOWN 82205 313 Figure 3 13 5 Repeat steps 3 and 4 as needed to remove any remaining air in the system 6 With both pistons in the full down position activate KIDNEY DOWN to apply full system pressure and close the by pass valve tighten the screw Page 33 b Cylinder Adjus
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