Service Manual - Arrow
Contents
1. Set the engine speed control lever to the FAST position and push the side shift control lever forward until the carriage reaches the extreme right end travel if the side shift will move Remove the bottom hose from the side shift motor This is a non pressure hose when the control lever is pushed forward Screw a pipe cap on the end of the removed hose and install a length of clean low pressure drain hose in the bottom port of the motor Place the other end of the hose in a clean 5 gallon container With the engine speed control lever in the FAST position hold the side shift control lever forward If the motor fills the 5 gallon container in less than one minute the motor is defective and should be replaced NOTE REPLACEMENT OF THE HYDRAULIC MOTOR IS RECOMMENDED INSTEAD OF ATTEMPTING TO MAKE FIELD REPAIRS 5000054 7 95 Side shift will not work cont d Lead cannot be raised to working position Rapid and erratic layback action of the lead 5000054 7 95 Table 12 1 Trouble Shooting Page 12 3 General Trouble Shooting cont d PROBLEM POSSIBLE CAUSE REMEDY Seized motor Cross slide bearings too tight Cross tubes bent or misaligned Improper lubrication of the ways Low or no hydraulic pressure Hammer weight not in proper position to raise lead Low or no hydraulic pressure Air in the hydraulic lines It is possible for a motor to be seized and not show up as defect2. Lead sheave not properly installed Defective or improperly adjusted safety switch on the automatic valve Loose electrical connection Defective or improper wiring connection Defective Electronic Control Station Defective solenoid valve Solenoid valve filter is plugged Defective solenoid valve Solenoid valve spool sticking Defective Electronic Control Station Turn power switch to ON Check and replace bulb Check all connections Check and replace fuse Eliminate switch Consult factory for rewiring procedure Replace Electronic Control Station Check the sensor lead and connections Replace defective sheave sensor Check adjustment and make sure sensor is positioned 1 8 from the sheave spokes Check all cable connections Test sensor cable for broken wires and replace if necessary Shim the lead sheave as necessary to reduce sideplay Badly worn lead sheaves must be replaced Check and make sure the casting letters on the lead sheave are positioned on the side opposite to the sheave sensor Remove the lead sheave and reinstall properly Eliminate switch Consult factory for rewiring procedure Check and tighten loose connections Consult factory for rewiring procedure Replace Electronic Control Station Replace solenoid valve Replace solenoid valve filter Replace defective solenoid valve Disassemble and clean solenoid valve Replace Electronic Control Station Page 12 1
3. be either repaired or replaced Note that in line filters should be found with every solenoid pilot valve Valve Switch On older Arrow hammers the automatic valve has a power shutoff switch mounted on the valve body The switch can get out of adjustment causing intermittent power loss to the Electronic Control Station The result is an abrupt stop of the hammer weight That action will be accompanied by blinking of the power on lamp on the Electronic Control Station The switch can get so far out of adjustment that it cuts the power completely in which case the entire electronic stroke control system will be dead Check the switch out if it is suspect Adjust the switch so that it properly follows the manual control valve handle Electronic Control Station The Electronic Control Station can fail in a way that can cause all of the above malfunctions The easiest way to check the Electronic Control Station is to replace the suspected unit with a known good one If the problem is corrected the suspected unit is bad Return it to the factory for repair If replacement of the Electronic Control Station is not possible check out the following features e Power lamp red The red lamp should be on when the unit is turned on If the lift lamp yellow is blinking properly with the free running timer and the power lamp is not lit the power lamp is probably burned out and should be replaced Note that a burned out bulb does not affect the operatio
4. the terminal strip Locate wire numbers 23 and 24 refer to the Electrical Diagram Figure 11 2 Remove the white and black cable lead going up to the sensor Check for a short to ground on either lead going to the sensor Both lead should read open with respect to ground Check wire 23 or the terminal block It should read 8 volts 0 2 volts Check the continuity of wire 24 going back to the timer It should read 100 ohms An open in the sensor cable can be checked out by connecting the white and black wires together at the sensor end and reading continuity at the terminal strip end 5000054 7 95 Table 12 2 Trouble Shooting Page 12 9 Electronic Stroke Control Trouble Shooting PROBLEM POSSIBLE CAUSE REMEDY Electronic Control Station power lamp does not turn ON power lamp does not light Erratic stroke at all settings of the Electronic Control Station Pressure settings correct Servo on the hammer valve is not shifting properly Hammer weight sticks in the UP position Solenoid valve has power Weight does not immediately raise after the tool strikes the ground excessive dwell time 5000054 7 95 Power switch turned OFF Power lamp is defective Loose electrical connection broken wire or blown fuse Defective valve switch Defective Electronic Control Station Defective or improperly adjusted sheave sensor Disconnected or defective sensor cable Excessive side play of the lead sheave
5. 0 Trouble Shooting Table 12 2 Electronic Stroke Control Trouble Shooting cont d PROBLEM POSSIBLE CAUSE REMEDY Excessive stroke Improper cable length Adjust cable length hammer weight hits the cross Stroke length set too high Stroke is approximately 8 at maximum setting member on the on the stroke control dial If a very long tool is lead used there may not be enough stroke available Set the stroke control dial to a lower value Engine speed set to high Reset engine speed Defective Electronic Control Station Replace Electronic Control Station Weight fails to Improper connection or defective Check cable for proper connection Replace raise after the tool Electronic Control Station defective Electronic Control Station strikes the ground Sheave sensor out of adjustment Adjust sensor See Adjustments section Defective sensor or sensor cable Check and replace sensor and or cable Stroke length set too short Adjust stroke length Hammer reverses Sheave sensor out of adjustment Adjust sensor See Adjustments section before the downstroke is Defective sensor or sensor cable Check and replace sensor and or cable completed Improper connection or defective Check cable for proper connection Replace Electronic Control Station defective Electronic Control Station Short Strokes Defective Electronic Control Station Replace Electronic Control Station Hammer not Engine rpm too low Increase engine rpm with t
6. ARROW MASTER MOBILE HYDRAULIC HAMMER MODEL 1350 Service Manual Publication No 5000054 Revised 09 12 SERIAL NUMBER SOLD AND SERVICED BY ARR ess Amm EV ARROW MASTER INCORPORATED 1201 Seventh Street East Moline IL 61244 MAS ER www arrowmaster com Page i 1 Table Of Contents 5000054 09 12 Electrical System ce WC Loe out le tee i 11 1 ELECTRONIC CONTROL STATION 11 1 Electronic Control Station Replacement 11 1 Proximity Sensor mog ox teat er eee 11 1 ELECTRICAL DIAGRAM firewall gauges 11 2 ELECTRICAL DIAGRAM front panel gauges 11 4 Trouble Shooting 330s 6 8 oe ei ee Ee ee ee es Cee ee 12 1 General Trouble Shooting charts 000 cect eee 12 1 ELECTRONIC STROKE CONTROL TROUBLE SHOOTING 12 8 General Apo iia Aap ate SRS ra eae at Slice Gente ney ea EE oe 12 8 sive dite dads ee deta pendants 12 8 Replacing the Sensor 12 8 Kieler 12 8 Electronic Stroke Control Trouble Shooting 12 9 SOlENGId Valek Ae eg Gai Siet Hua ea ere Deeded galled 12 11 Valv
7. An orifice fitting must be installed on the cylinder to maintain a safe control speed The layback safety latch must be raised manually to lay the lead down NOTE THIS SAFETY LATCH IS FOR THE OPERATOR S PROTECTION AND SHOULD NEVER BE MADE INOPERATIVE Page 12 4 Trouble Shooting Table 12 1 General Trouble Shooting cont d PROBLEM POSSIBLE CAUSE REMEDY Lead will not tilt Lead center pin is stuck Disassemble the lead from the cross slide carriage and repair Dress off pin if necessary Check and replace center pin bushings if worn Lubricate Low or no hydraulic pressure Replace defective hoses Repair or replace defective valve Check for proper oil level and fill as needed Refer to the Hydraulic Pressure Adjustment section of this manual for adjustment procedures Tilt cylinder will The control valve is not centering to the Spring assembly bolt refer to the Parts not hold hold position Manual is loose check and tighten the bolt Worn or defective cylinder Repair or replace To check for a leaky cylinder use the following procedure a Tilt the top of the lead to the right and disconnect the lower hose from the tilt cylinder Cap the hose and apply pressure VERY SLOWLY to tilt the lead to the right by metering the valve as slowly as possible If oil does not discharge from the cylinder rod end port the cylinder is OK Both hoses must be connected to reposition the lead Tilt the lead to the left r
8. ble Shooting cont d PROBLEM POSSIBLE CAUSE REMEDY When raising the weight the weight settles before starting upward Hammer weight sticks in the UP position Erratic Strokes Premature reversals both up and down Excessive stroke hammer weight hits the cross member on the lead Weight fails to raise after the tool strikes the ground 5000054 7 95 Worn or defective check valve Defective relief valve seat Broken spring on pilot valve Defective pilot valve Upstroke trip finger is not actuating the lever on the pilot valve mechanical stroke and cable adjust models Loose electrical connection Defective valve switch Improper cable length Stroke length set too high mechanical stroke and cable adjust models Engine speed set to high Trip fingers improperly set mechanical stroke and cable adjust models Stroke length set too short mechanical stroke and cable adjust models Repair or replace entire check valve Seal or replace Replace spring Replace pilot valve Reset trip finger position or adjust cable length Check and tighten loose connections Replace valve switch Adjust cable length Reset trip finger position or adjust cable length Reset engine speed Reset trip fingers Adjust stroke length Page 12 8 Trouble Shooting ELECTRONIC STROKE CONTROL TROUBLE SHOOTING Refer to Table 12 2 General A correctly operating stroke control s
9. e Swit hi miri snema iae eles prs SEN Pai Sete ees ee Pee Ge d See ee ais els 12 11 Electronic Control Station 12 11 Stroke Length Control 12 11 G vernor Setting cesi fed biel ademas unis del ne ad 12 11 Parts ie wk wed ta id ay bi ee a basa ae ee dE 12 12 5000054 05 07 11 1 Electrical System ELECTRONIC CONTROL STATION Electronic Control Station Replacement Remove the screws securing the Electronic Control Station to the control panel Pull the Electronic Control Station back and out of the panel Unscrew the electrical connector from the back of the Electronic Control Station Reinstall the new Electronic Control Station by reversing the above procedure The old Electronic Control Station may be returned to Arrow for repair PROXIMITY SENSOR The procedures for replacing and adjusting the proximity sensor are located in the Adjustments section ee Used on S N 6300 6909 PROXIMITY SENSOR 2 TERMINAL BLOCK ON VALVE MOUNTING PLATE 218 TERMINAL BLOCK ON ENGINE FIREWALL R IGNITION SWITCH DIESEL FUELS PUMP WIRE IDENTIFICATION TO WATER B BLACK BL BLUE BR BROWN TEMPERATURE G GREEN OR ORANGE R RED Y YELLOW W WHITE Figure 11 1 Wiring Connections Starter Interlock and Electronic Control Station 5000054 7 95 Page 11 2 Electrical Sy
10. e threads of sensor for convenient replacement and remove the sensor e Check the end of the sensor for damage If the sheave hits or rubs the end of the sensor it s probably ruined and must be replaced Check the sheave for excessive side play 1 32 maximum side play Replacing the Sensor Pay attention to wire colors the sensor won t work if the lead are reversed Set the sensor at the proper spacing The end of the sensor should clear the sheave by 1 8 inch Refer to the Adjustments section of this manual Voltage Check If the sensor appears to be physically sound make the following electrical checks before replacing the sensor Note Do not disconnect the sensor lead 1 Check the blue sensor wire with respect to ground Move the sensor to and from metal There should be a definite meter movement from approximately 0 8 volts when away from the metal to less than 0 1 volts when the sensor is very near or touching metal 2 Ifthe sensor doesn t react as described above open the blue sensor lead from the black cable lead and make a continuity check of the black lead with respect to ground The black lead should measure 100 ohms with respect to ground If it reads 0 ohms the black lead is shorted somewhere If it reads open the black lead is open somewhere in the cable If the cable lead are ok according to the above checks the sensor is bad 3 Ifacable problem is indicated remove the cowling over the controls for access to
11. er clockwise The stroke is adjustable to any desired length between maximum and minimum stroke Minimum stroke should be approximately one foot If stroke control can t be achieved the Electronic Control Station is bad and should be replaced Governor Setting If the governor speed is too far off from 2200 rpm the stroke length will vary from the 8 ft maximum stroke normally expected The Electronic Control Station times the up stroke Therefore if the engine runs faster than 2200 rpm causing more oil to be pumped the stroke length will be increased for any given setting of the stroke length control knob Conversely the stroke length will be decreased if the engine runs slower than 2200 rpm 5000054 7 95 Page 12 12 Trouble Shooting Figure 12 1 Electronic Stroke Control 5000054 05 07 5000054 05 07 Trouble Shooting 12 13 Electronic Stroke Control Part Number 2000608 4001852 4001853 4001724 4001723 4001725 4001721 2000609 3001827 3002003 4001890 4001791 4001790 4001789 4001788 4001782 4000584 3001895 4000686 4001779 4001778 4001234 4001421 4001296 4001891 4001812 4001306 4001806 3001887 3002161 4001786 4002081 3001858 4001805 2000626 2000625 4001849 4001722 4002143 5503071 5550402 Description Controller Toggle Switch Boot Red Lens Lamp 2 Amber Lens Knob Control Cable 14mm Sensor Bracket 1982 87 18mm Sensor Bracke
12. eversing the previous step to test the cylinder in the opposite direction Testing the cylinder in both directions insures that the piston rod nut is secure With a loose piston rod nut it is possible to seal in one direction while leaking in the opposite direction Also a cylinder barrel can be defective at one end of the stroke and be perfect at the other end Testing in this manner checks both ends of the cylinder barrel 5000054 7 95 Table 12 1 Trouble Shooting Page 12 5 General Trouble Shooting cont d PROBLEM POSSIBLE CAUSE REMEDY Layback cylinder The control valve is not centering to the will not hold hold position Worn or defective cylinder Premature cable Not using proper cable breakage Cable is too dry Cable is improperly threaded Defective sheave bearings Hammer relief pressure is too high Worn cable sheaves Stopping the hammer weight on the downstroke with the hydraulic control 5000054 7 95 Spring assembly bolt refer to the Parts Manual is loose check and tighten the bolt Repair or replace To check for a leaky cylinder use the following procedure Push forward on the layback control lever until the lead is as far forward as possible Disconnect the hose from the anchor end of the cylinder cap Apply pressure VERY SLOWLY by moving the layback control lever slowly forward If the cylinder is defective oil will discharge out of the anchor end cylinder port B
13. ew filter cartridge NEVER USE GASOLINE FOR SYSTEM CLEANING OR FLUSHING THE HYDRAULIC SYSTEM Center control valve to neutral position Tighten connectors Replace pumps Page 12 2 Trouble Shooting Table 12 1 General Trouble Shooting cont d PROBLEM POSSIBLE CAUSE REMEDY Hydraulic creeper Creeper engaging lever or linkage not in Engage the creeper lever Operate the will not work the correct position creeper control to engage the gears Check for missing pins key and spring Creeper interlock is not engaged Engage the creeper interlock transmission must be in neutral position Creeper valve is not operating properly Check the creeper valve cam and linkage Release the parking brake Low or no hydraulic pressure Replace defective hoses Check for proper oil level and fill as needed Refer to the Hydraulic Pressure Adjustment section of this manual for adjustment procedures Creeper bypass valve is sticking Remove and disassemble Check for broken or sticking parts Defective hydraulic parking brake Repair or replace Defective creeper motor Repair or replace Defective internal mechanism Remove and inspect the creeper motor Repair or replace Side shift will not Defective or worn side shift motor Replace defective motor Refer to the work following procedures to check for a worn or scored side shift motor a Make certain the control valve pressure is correct and the oil temperature is normal
14. he engine speed getting full stroke control hand throttle Pressure settings correct Additional notes 1 Low pilot pressure is usually indicated by premature reversals during side shift operation If the pilot pressure is low the side shift operation lowers it below critical levels causing the hammer valve to shift prematurely 2 The pilot valve spool can stick or the seals on the spool can fail If the Electronic Control Station is supplying the voltage to the solenoid valve as measured across the solenoid coil but the hammer weight is not reversing a bad pilot valve is indicated If with the engine turned OFF and the Electronic Control Station cycling a clicking sound is heard from the pilot valve the solenoid is operating but the spool is defective 5000054 7 95 Trouble Shooting Page 12 11 Solenoid Valve The most common failure of a pilot valve is a sticky spool usually caused by dirt in the system If the spool sticks the hammer valve receives no pilot signal As a result the hammer goes either to the top of the lead and stays or goes to the bottom of the lead and won t lift If this condition occurs turn on the Electronic Control Station and allow it to free run engine off Observe the up down lamps to assure the Electronic Control Station is cycling Audible checks should be heard each time the timer switches from up to down and visa versa If the checks are not heard the valve spool is sticking and should
15. ive in the procedure above If the side shift motor does not appear to rotate against the chain remove the chain and attempt to rotate the motor by actuating the control lever If it will not rotate the motor bearings are probably seized and the motor must be replaced Adjust cross slide bearings according to the instructions in the Adjustments section of the Operator s Manual Repair or replace Clean ways with a suitable solvent and lubricate Replace defective hoses Repair or replace control valve Check for proper oil level and fill as needed Refer to the Hydraulic Pressure Adjustment section of this manual for adjustment procedures Weight should be carried in locked position At this point the hydraulic system can easily raise the lead If the lead are accidently laid down with the hammer weight at the top of the lead the weight can be slid forward by allowing a small amount of slack in the cable and stopping the machine abruptly while moving slowly forward CAUTION DO NOT ALLOW AN EXCESSIVE AMOUNT OF SLACK IN THE CABLE Replace defective hoses Check for proper oil level and fill as needed Refer to the Hydraulic Pressure Adjustment section of this manual for adjustment procedures If the oil has been drained for any reason and no oil is present in either side of the cylinder the operator should carefully actuate the layback cylinder a small amount in each direction until the air has been expelled
16. n of the unit e Lift lamp yellow Switching of this lamp blinking on and off should be accompanied by the clicking sound of the solenoid pilot valve as it is actuated If the lift lamp does not blink while the solenoid pilot valve is cycling the bulb is probably burned out Note that a burned out bulb does not affect the operation of the unit e Valve Driver Transistor Switch If the solenoid pilot valve doesn t click but the lights blink in synch with the free running timer the valve driver transistor may be bad Check the voltage at the solenoid pilot valve and at terminal 20 on the terminal board The voltage should swing between 12 volts and approximately volts in synch with the lift lamp If the voltage cycles as described the solenoid valve coil may be burned out check the coil for continuity If the voltage doesn t cycle as described the transistor switch in the Electronic Control Station is probably bad Before replacing either the Electronic Control Station or the solenoid valve visually inspected the wiring between the solenoid valve and Electronic Control Station Be sure that all connectors and terminals on the terminal block are tight Stroke Length Control The stroke length is adjustable by means of the control knob on the front face of the Electronic Control Station The stroke length should be at the maximum when the knob is set to the no 8 on the dial The stroke shortens proportionately as the knob is rotated count
17. oth ee must be connected to reposition the ead Reconnect the hose to the anchor end of the cylinder Lay the lead down on the lead support by pulling back on the layback control lever To test the other end of the cylinder remove and cap the hose at the rod end of the cylinder Apply pressure VERY SLOWLY by pulling back on the layback control lever If oil discharges from the cylinder rod end port the cylinder is defective Remove and repair the defective cylinder Inspect bore finishes replace rings and seals If the cylinder barrel is rough replace the barrel Install proper cable Lubricate the cable sparingly with standard cable lubricant Rethread the cable See the Adjustments section of the Operator s Manual Replace the sheave bearings Reset the pressure in the hammer lift circuit See Hydraulic Pressure Adjustment section Replace cable sheaves Avoid stopping the weight whenever possible this stresses the cable Allow the tool to strike the ground Avoid allowing the hammer weight to fall through the end of the cylinder travel Page 12 6 Trouble Shooting PROBLEM POSSIBLE CAUSE REMEDY On down stroke the valve does not reverse and raise the hammer weight Hammer weight drifts down 5000054 7 95 Table 12 1 General Trouble Shooting cont d Defective pilot valve Broken spring on pilot valve Downstroke trip finger is not actuating the lever on the pilot valve mechanical s
18. ouble Shooting PROBLEM POSSIBLE CAUSE REMEDY Interlock switch actuated Defective interlock switch Defective valve switch Defective starter relay on firewall Improper connection or blown fuse Low oil level Cold oil Improper oil Contaminated oil Valve left in operating position and oil is passing over relief valve Air is entering the hydraulic system Air can enter intake hoses at clamps or defective hoses between the oil reservoir and pump Air entering the intake side of the pumps will make them very noisy Air in the system can be detected by the milky appearance of the oil Sometimes oil will foam Air can ane a pump intake without a visible oil eak Defective or worn hydraulic pumps Check starting circuit interlock switches Automatic stroke control lever must be in the man start position creeper drive must be disengaged and the clutch pedal must be depressed Check and replace interlock switch Check and replace valve switch Check and replace starter relay Check all connections Check and replace blown fuse s Refer to Engine Manufacturer s Service Manual for additional information on engine starting problems and general service requirements Add oil to correct level Allow machine to idle until oil has warmed up sufficiently Refer to Hydraulic Fluid Recommendations in the Fuels Fluids amp Lubricants section of the Operator s Manual Replace with new oil and n
19. stem WIRING DIAGRAM WS 1000109 5000054 05 07 FIREWALL AMMETER OIL PRESSURE FUEL GAUGE SENDING UNIT I DEE FIREWALL Figure 11 2 Electrical Diagram Firewall Mounted Gauges Electrical System Page 11 3 WIRE IDENTIFICATION 1 B BLACK BL BLUE BR BROWN G GREEN GY GRAY LBL LIGHT BLUE OR ORANGE R RED GY GRAY WITH W WHITE Y YELLOW BLACK STRIPE NOTES 1 IF TURN SIGNALS ARE NOT PROVIDED L WIRE 13 FROM BRAKE PRESSURE SWITCH DASHBOARD IS CONNECTED TO TERMINAL 9 ON THE TERMINAL BLOCK TERMINALS 8 amp 9 ARE ALSO JUMPERED TOGETHER 2 FOR SHUTDOWN GAUGE SET WIRING SEE 7000169 3 FIRST USED S N 6300 6909 WIRING DIAGRAM ELECTRONIC STROKE WS 1000109 5000054 05 07 Page 11 4 Electrical System AC PANEL 30A BREAKER TO AC 6G Git 9 m Cio 14 ee Ce es C7 uy yay ee C22 08 WIRING DIAGRAM ELECTRONIC STROKE FRONT MOUNTED GAUGES CADD6 GCD HMMR WS WS 0134e dwg Figure 11 3 Electrical Diagram 5000054 1 09 Electrical System Page 11 5 8 2 FOR SHUTDOWN GAUGE SET WIRING WIRING DIAGRAM SEE 2000902 ELECTRONIC STROKE SPRL USED ON SIN Gri Aen FRONT MOUNTED GAUGES CADD6 GCD HMMR WS WS 0134e dwg 5000054 1 09 Trouble Shooting Engine will not crank Noisy hydraulic system 5000054 7 95 Table 12 1 Page 12 1 General Tr
20. t 1987 18mm Sensor w Nuts 1987 Cover Gasket Conduit Body Cord Grip Cord Grip J Clip 4 Conduit Clamp 2 5 Amp Fuse Fuse Holder Terminal Block 3 8 x 30 Hose 2 1 4 x 3 8 Swivel 2 Male Elbow Oil Filter 3 8 x 40 Hose 2 1 4 x 3 8 90 Swivel Switch Bracket Thru S N 6021 Switch Bracket S N 6022 6299 Valve Switch Thru S N 6021 Valve Switch S N 6022 6299 Actuating Rod Thru S N 6021 Solenoid Valve Relay Wiring Harness Shielded Cable Solenoid Discontinued 1995 Solenoid Discontinued 1985 Safety Switch 6 32 x 1 1 8 Screw 6 32 Locknut
21. troke and cable adjust models Stroke length set to short Damaged or defective hammer control valve handle linkage Hammer control valve spool is binding Check valve and seat are worn and leaking Broken or weak hammer control valve spool return spring Leaking seals in hammer lift cylinder Worn hammer control valve spool Replace pilot valve Replace spring Reset trip finger or adjust cable length Adjust stroke length Repair or replace handle linkage Inspect and clean the hammer control valve Excessively tightened mounting hardware can deflect the valve body enough to bind the spool Loosen the mounting hardware and retighten Torque to 25 ft lbs Replace check valve and seat Replace spring To test for leaking seals raise the cylinder to maximum stroke with the hammer weight at the top of the lead Allow the hammer lift control valve to remain in the center position until the hammer weight reaches the ground Disconnect the line from the top of the hammer lift cylinder rod end Slowly raise the hammer weight If oil discharges from the disconnected cylinder port the seals may need to be replaced If the cylinder barrel surface is rough or grooved the cylinder and base should be replaced Replace the hammer control valve NOTE Some leakage is normal and necessary for every type hydraulic valve and should not be cause for alarm Trouble Shooting Page 12 7 Table 12 1 General Trou
22. ystem is evidenced by a repetitive stroke length independent of terrain Having set the stroke length there should be no further requirement to change it The hammer should be able to operate as long as necessary without making further adjustments It should be clearly understood that the stroke length adjustment knob sets the total stroke length not the height to which the hammer rises on the lead The controller references stroke length from the striking point of the tool Obviously if the tool is striking 3 feet below the road level the high point on the lead will be 3 feet lower than if the tool is striking at road level Sensor Problems If the hammer is operating within the stroke capability there should be no cable snatching Cable snatching usually indicates a problem with the proximity sensor or its associated cable If the cable is snatched infrequently the proximity sensor is probably set too far from the sheave Setting the sensor 1 32 closer to the sheave will probably cure the problem If the cable is snatched frequently or if the hammer weight has a tendency to crawl up the lead on short strokes the sensor or its associated cable is faulty The system has no ground reference without a sensor so the timer free runs In other words the controller doesn t know where the hammer weight is The sensor and its cable can be checked most conveniently at the sensor itself Following are a List of Checks e Mark the adjustment on th
Download Pdf Manuals
Related Search