TECHNICAL SERVICE MANUAL
Contents
1. SEAL HOUSING O RING NZ J ROTARY FACE O RING STATIONARY FACE O RING E7 AV Fat AN f PA SEAL HOUSING fea ROTARY FACE m i WAVE SPRING A Y A I STATIONARY FACE f FIGURE 8 SINGLE SEAL CROSS SECTION ROTOR ROTARY FACE O RING ROTARY FACE FIGURE 9 SINGLE SEAL ROTARY MEMBER Rotary Member Installation FIGURE 9 1 Install the rotary face O ring onto the back of the rotary face 2 Install the rotary face onto the backside of the rotor Make sure that the lugs on the backside of the rotary face line up with the anti rotation holes in the rotor CASING STATIONARY FACE STATIONARY FACE O RING ANTI ROTATION WASHER WAVE SPRING CAP SCREW FOR ANTI ROTATION WASHER Nb SEAL HOUSING O RING FIGURE 10 SINGLE SEAL STATIONARY MEMBER Stationary Member Installation FIGURE 10 1 Install the seal housing O ring into the seal housing 2 Install the seal housing into the casing When installing the seal housing into the casing the anti rotation cut out of the seal housing must line up with the anti rotation washer on the backside of the casing Install the wave spring into the seal housing Install the stationary face O ring onto the stationary face Install the stationary face into the seal housing Line up the notches on the back of the stationary face with the tabs on the seal housing DOUBLE MECHANICAL SEAL SEAL HOUSING O RING ral ROTARY2. SEAL HOUSING O RING ROTARY SEAL INSERT O RING ROTARY SEAL INSERT FIGURE 17 DOUBLE O RING SEAL CROSS SECTION ROTOR ROTARY SEAL INSERT O RING ROTARY SEAL INSERT FIGURE 18 DOUBLE O RING SEAL ROTARY MEMBER Rotary Member Installation FIGURE 18 1 Install the rotary seal insert O ring onto the rotary seal insert Install the rotary seal insert onto the backside of the rotor Make sure that the lugs on the backside of the rotary seal insert line up with the anti rotation holes in the rotor ANTI FROTATION WASHER CAP SCREW FOR ANTLROTATION 7 eam gt BARRIER BUFFER FLUID CONNECTIONS FIGURE 19 DOUBLE O RING SEAL STATIONARY MEMBER Stationary Member Installation FIGURE 19 1 Install the four seal housing O rings into the seal housing 2 Install the seal housing into the casing When installing the seal housing into the casing the anti rotation cut out of the seal housing must line up with the anti rotation washer on the backside of the casing BARRIER BUFFER FLUID FOR DOUBLE SEAL amp DOUBLE O RING SEAL WARNING PUMPS WITH DOUBLE SEALS AND DOUBLE O RING SEALS REQUIRE A LIQUID BARRIER BUFFER FLUID OPERATING A PUMP WITH A DOUBLE SEAL OR DOUBLE O RING SEAL WITHOUT A BARRIER BUFFER FLUID WILL DAMAGE THE SEAL AND PUMP PARTS DUE TO EXCESS HEAT CAUSED BY DRY RUNNING THE BAR
3. a pin type spanner wrench to install the thrust bearing assembly but do not over tighten The thrust bearing assembly will be used later to set the end clearance of the pump after the head of the pump has been installed Install the locknut on the shaft and hand tighten to keep the shaft in place while the rotor is installed Install the anti rotation washer in the bracket side of the casing with the anti rotation washer capscrew The chamfer side of the washer needs to be facing the casing For single seals install pipe plugs in the seal 10 11 12 13 14 15 16 barrier buffer fluid holes These holes are only used for double seals Press the head alignment dowel pins into the casing if they are not already installed Install the stationary member of the seal in the casing Refer to the additional seal installation instructions in the Mechanical Seal section page 10 Install the casing studs in the bracket if they are not already installed Use a suitable food grade threadlocker when installing the casing studs in the bracket Refer to casing stud locations shown in Installation of Casing Studs page 14 Use the casing studs to install the casing on the bracket The port with a casing groove needs to be used as the suction port for the pump s primary rotation For clean in place pumps one port must be oriented downward to allow the pump to be self draining Use two nuts to hold the casing in place during ass
4. FACE O RING STATIONARY FACE O RING 7 Z Lay j TA SEAL HOUSING fi ROTARY FACE to m WAVE SPRING Ny t STATIONARY FACE A 7 ZAG oe a A FIGURE 11 DOUBLE SEAL CROSS SECTION ROTOR ROTARY FACE O RING FIGURE 12 DOUBLE SEAL ROTARY MEMBER Rotary Member Installation FIGURE 12 1 Install the rotary face O ring onto the back of the rotary face 2 Install the rotary face onto the backside of the rotor Make sure that the lugs on the backside of the rotary face line up with the anti rotation holes in the rotor SEAL HOUSING STATIONARY FACE i STATIONARY FACE O RING CASING 4 WAVE SPRING Y H AR y A va bS STATIONARY FACE STATIONARY FACE O RING ex N i AN ANTI ROTATION WASHER WAVE SPRING CAP SCREW FOR ANTI ROTATION i SL SEAL HOUSING O RING ji A J M a _ gt gt BARRIER BUFFER FLUID CONNECTIONS SZ we FIGURE 13 DOUBLE SEAL STATIONARY MEMBER Stationary Member Installation FIGURE 13 1 Install the two seal housing O rings into the seal housing Install the seal housing into the casing When installing the seal housing into the casing the anti rotation cut out of the seal housing must line up with the anti rotation washer on the backside of the casing 3 Install the wave springs into the seal housing Install the stationary face O rings
5. Rotor Retainer Oring 19 Seal Not Shown 396 Capscrew tor ler Pin 74 Rotor Retainer 20 Bal Bearing inne a0 Hea 7s Capscrew for Ant Rotaton Washer Car eese on ing For aket Head Pae 76 Ant Rotation Washer C0 Pipe Pug a2 jacket Head Pie 80 jacket Tubing for Bract Car eeso e ooe O O o 35 heao aa Nwe Sd SCS FIGURE 4 EXPLODED VIEW FOR HYGIENIC SERIES MODELS SECTION TSM 230 ISSUE A PAGE 5 OF 15 SECTION TSM DISASSEMBLY DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir etc Be sure 1 That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings or connections 2 That the driving means motor turbine engine etc has been locked out or made non operational so that it cannot be started while work is being done on pump 3 That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid Obtain a material safety data sheet MSDS for the liquid to be sure these precautions are understood Failure to follow above listed precautionary measures may result in serious injury or death WARNING DO NOT INSERT TOOLS IN THE VIEWING GAPS BETWEEN THE CASING AND BRACKET OR DAMAGE TO THE SHAFT SEAL AND BEARING WILL RESULT Remove the head nuts If pump has a jacketed head plate remove the jacketed head plate and O ring Remove head
6. STUDS Casing Orientation Location of Casing See Figure 20 Studs See Figure 21 H HL LQ LL LS E neces H HL LQ a N TABLE 2 LOCATION OF CASING STUDS DISASSEMBLY amp INSTALLATION OF INNER BALL BEARING 1 Apress must be used for disassembly and installation of the inner ball bearing 2 Take care not to damage the spline end of the shaft If you must press on the spline end use a spacer to protect the spline end 3 Make sure the inner race of the bearing is properly supported SECTION TSM 230 ISSUE A PAGE 14 OF 15 4 Make sure the shaft is perpendicular to the face of the bearing 5 Using a food grade lubricant on the inner race and shaft will help with the installation 6 Press the bearing onto the shaft until the inner race contacts the shoulder in the shaft SPLINE END INNER BEARING SHOULDER OF SHAFT FIGURE 22 INNER SINGLE ROW BALL BEARING THRUST BEARING ADJUSTMENT DANGER MAKE SURE THAT THE DRIVING MEANS MOTOR TURBINE ENGINE ETC HAS BEEN LOCKED OUT OR MADE NON OPERATIONAL SO THAT IT CANNOT BE STARTED WHILE WORK IS BEING DONE ON PUMP WARNING DO NOT TIGHTEN THE LOCKNUT OR MAKE MAJOR ADJUSTMENTS TO THE END CLEARANCE OF MECHANICALLY SEALED PUMPS WHILE THE SEAL IS INSTALLED IN ORDER TO AVOID DAMAGING THE SEAL FACES ONLY MINOR ADJUSTMENTS TO THE END CLEARANCE OF LESS THAN 0 005 CAN BE MADE WHILE THE MECHANICAL SEAL IS INSTALLED THE LOCKNUT CAN BE TIGH
7. Thread Size H y i inch inch The fastener torque values are listed in Table 1 Use food grade anti seize when installing all fasteners except for the 1 3 4 1 4 20 locknut KS LS 2 1 2 1 4 20 Description PL KS KK LOAL Aphis cnacap _TreadSee 02 raze w a ROTOR REMOVAL r Ani Sere te pasa e e e e 17 Loosen the two setscrews in the face of the bearing Anti Rotaton ThreadSize me me 3e 3e housing and turn the thrust bearing assembly counter Washer Capscrew Anti Seize clockwise with a pin type spanner wrench and remove Button Head Torque ft lbs from bracket See Figure 7 ee Se e Rotor Retainer Anti Seize SET SCREW Z Torque ft lbs 30 35 30 35 30 35 30 35 END CAP er Pn cepon Se we ar ae ae cs scan agal oe oe on oe LOCKNUT Torque ft lbs SHAFT ThreadSize 14 site se 3e Head Nuts Anti Seize Temne ts ftibs 45 7 8 13 14 13 14 E S l gi Y Locknut y Torque itas 5070 100 130 100 130 120 150 IgE OUTER BALL BEARING Lp TABLE 1 FASTENER TORQUE VALUES BEARING HOUSING ASSEMBLY FOR MECHANICALLY SEALED PUMPS FIGURE 7 THRUST BEARING ASSEMBLY 1 On jacketed pumps install jacket tubing onto the bracket by squeezing the tubing between the slots of the bracket 18 Disassemble the thrust bearing assembly by removing flange Make sure that the tubing does not extend past the the outer ball
8. after the head of the pump has been installed Install the locknut on the shaft and hand tighten to keep the shaft in place while the rotor is installed Install the anti rotation washer in the bracket side of the casing with the anti rotation washer capscrew The chamfer side of the washer needs to be facing the casing For single seals install pipe plugs in the seal barrier buffer fluid holes These holes are only used for double seals Press the head alignment dowel pins into the casing if they are not already installed Install the casing studs in the bracket if they are not already installed Use a suitable food grade threadlocker when installing the casing studs in the bracket Refer to casing stud locations shown in Installation of Casing Studs page 14 Use the casing studs to install the casing on the bracket The port with a casing groove needs to be used as the suction port for the pump s primary rotation For clean in place pumps one port must be oriented downward to allow the pump to be self draining Use two nuts to hold the casing in place during assembly These nuts should be located on opposite sides of the casing A spacer or a couple of larger nuts will need to be used to compensate for the unthreaded section of the casing studs It is important the casing is secured during assembly to avoid damage to the pump internals Install the rotor onto the shaft by lining up the splines on both components Install the roto
9. bearing See Figure 7 flange surface and interfere with installation of the casing 19 Clean all parts thoroughly and examine for wear and 2 Use an arbor press to install the inner single row ball damage Check ball bearings idler bushing and idler pin bearing onto the shaft Refer to Disassembly and and replace if necessary The casing should be examined Installation of Inner Ball Bearing page 14 The inner for wear particularly in the area between the ports bearing in this pump is a Sealed for Life bearing that has Check all other parts for nicks burrs excessive wear and seals on both sides This bearing can be installed either replace if necessary All O rings should be replaced side first and does not need to be packed with grease SECTION TSM 230 ISSUE A PAGE 7 OF 15 10 11 12 13 14 15 SECTION TSM Coat the shaft with light food grade oil Install the shaft and bearing into the bracket from the pump end Install the outer ball bearing into the bearing housing The outer ball bearing is a Sealed for Life bearing that has seals on both sides This bearing can be installed either side first and does not need to be packed with grease Do not install the end cap See Figure 7 Start the thrust bearing assembly into the bracket Use a pin type spanner wrench to install the thrust bearing assembly but do not over tighten The thrust bearing assembly will be used later to set the end clearance of the pump
10. cool and lubricate the seal The port with the casing groove must be used as the suction port for the pump s primary rotation Pumps may be operated in the opposite direction for short periods of time such as for stripping the line before cleaning Running the pump in the opposite direction turns the casing groove into a flush groove which causes the area behind the rotor and the seal to be subjected to the discharge pressure Pressure protection must be provided downstream of the pump regardless of rotation or damage to the pump or drive may result The port with a casing groove shown as V needs to be used as the suction port for the pump s primary rotation Due to the casing groove location orientations C F J and K will require a special casing Idler pin Shown as and rotation shown is as viewed from shaft end of pump v 6 D D D C Ge gt v v T pms A B C D E F CIP able Port Options one port oriented downwards for drainability Eas Ss He DI aS oS Ce Cre G H l J K L Additional Options for COP FIGURE 20 PUMP ROTATION SECTION TSM 230 ISSUE A PAGE 13 OF 15 INSTALLATION OF CASING STUDS Use Figure 21 and Table 2 to determine casing stud location for your casing orientation You can see the available casing orientations in Figure 20 Note Figure 21 is as viewed from the head end of the pump and Figure 20 is as viewed from the shaft end of the pump FIGURE 21 LOCATION OF CASING
11. onto the stationary faces 5 Install the stationary faces into the seal housing Line up the notches on the back of the stationary faces with the tabs on the seal housing SECTION TSM 230 ISSUE A PAGE 11 OF 15 SINGLE O RING SEAL SEAL HOUSING O RING All ROTARY SEAL INSERT O RING ROTARY SEAL INSERT SEAL HOUSING A A D FIGURE 14 SINGLE O RING SEAL CROSS SECTION ROTOR ROTARY SEAL INSERT O RING ROTARY SEAL INSERT FIGURE 15 SINGLE O RING SEAL ROTARY MEMBER Rotary Member Installation FIGURE 15 1 Install the rotary seal insert O ring onto the rotary seal insert 2 Install the rotary seal insert onto the backside of the rotor Make sure that the lugs on the backside of the rotary seal insert line up with the anti rotation holes in the rotor o FIGURE 16 SINGLE O RING SEAL STATIONARY MEMBER SECTION TSM 230 ISSUE A PAGE 12 OF 15 SEAL HOUSING O RING Stationary Member Installation FIGURE 16 1 2 Install the two seal housing O rings into the seal housing Install the seal housing into the casing When installing the seal housing into the casing the anti rotation cut out of the seal housing must line up with the anti rotation washer on the backside of the casing DOUBLE O RING SEAL SEAL HOUSING
12. with appropriate bristle brush and suitable cleaning solution 4 dies with clean water and dry blind tapped hole with REQUIRED CLEARANCE FOR clean air DISASSEMBLY 5 Use new O rings when reassembling the pump For mechanically sealed pumps follow steps 27 and 29 31 from the assembly procedures to reassemble the pump For O ring sealed pumps follow steps 13 and 15 17 from the assembly procedures to reassemble the pump As long as the thrust bearing was not adjusted the end clearance should still be set correctly Verify the end clearance and adjust if necessary before putting pump back into service If the locknut needs to be retightened or the end clearance needs to be adjusted follow the complete assembly procedures Do not tighten the locknut or make major gt 0 005 adjustments to the end clearance of mechanically sealed pumps while the seal is installed in order to avoid damaging the seal faces Note Install new rotor retainer if debris remains after cleaning It is recommended that the rotor retainer O rings be replaced every 12 months to maintain a tight seal FIGURE 3 CLEARANCE FOR DISASSEMBLY Pt ooa aoo O S o ament Dowel Pin Ca femea lee ha SSCS oa Large Head Alignment Dowel Pn 3B lCapscrew tor End Cap 37 idler and Bushing Assembly 64 Stua torcas 6 Bal Bearing Ouen 39 oeren 71 Rotor Retainer Cap Ovng TTA setScrew oB ier PinOving 73
13. ENSURE THAT THE CLEANING SOLUTION IS COMPATIBLE WITH PUMP COMPONENTS PUMP PARTS SHOULD REMAIN IN CLEANING SOLUTION NO LONGER THAN NECESSARY TO AVOID CORROSION TO PUMP COMPONENTS SECTION TSM 230 ISSUE A PAGE 4 OF 15 3 Use new O rings when reassembling the pump For O ring sealed pumps use steps 7 17 from the assembly procedures for O ring sealed pumps to reassemble the pump For mechanically sealed pumps follow steps 7 9 13 and 24 31 from the assembly procedures for mechanically sealed pumps to reassemble the pump As long as the thrust bearing was not adjusted the end clearance should still be set correctly Verify the end clearance and adjust if necessary before putting pump back into service If the locknut needs to be retightened or the end clearance needs to be adjusted follow the complete assembly procedures Do not tighten the locknut or make major gt 0 005 adjustments to the end clearance of mechanically sealed pumps while the seal is installed in order to avoid damaging the seal faces CIP CLEAN IN PLACE RECOMMENDATIONS Hygienic Series pumps are designed for in place cleaning A partial bypass loop around the pump is recommended to control the pressure and flow across the pump during the CIP process Please consider the following recommendations when designing and installing a CIP system 1 Casing must be installed with one port oriented downward to allow liquid to drain from the casing The port with a ca
14. Electronic copies of the most current TSM issue can be found on the Viking Pump website at vikingopump com TECHNICAL SERVICE MANUAL HYGIENIC INTERNAL GEAR PUMPS SERIES 157B 4157B 257B amp 4257B SIZES H HL KS K KK LQ LL LS CONTENTS MMOD UCHON eisoes 1 Safety Information scscascasiariaaiiniaadiatedanas 2 Special MPORMALNOM lt iis orenetan 3 Maintenant E aiaia i eciiias 3 Cleanic eaa aid 4 Required Clearance for Disassembly eee 5 Exploded View Drawing ccsccceseeseneeeeeneeeeens 5 Disassembly e siwian ev avian tianlian 6 AASSEMMDIY isisa a aa 7 Fastener Torque Vale Sassniiisi nn 7 Mechanical Seal iirst uiga 10 Single Seal sexs eesti ei eka E 10 Double Sealainn 11 Single O ring Seal sssini 12 Double O ring Sealsin 12 Barrier Butter FIUIC visiirien 13 PUMp ROtatiON iscsi 13 Installation of Casing Studs 0 0 eeeeeeeeeenreeees 14 Disassembly amp Installation of Inner Ball Bearing 14 Thrust Bearing Adjustment 0 eee eeeeeeeeeeteeeenees 14 Installation Of Bushings 15 Warranty tice nection hee einstein 15 INTRODUCTION The illustrations used in this manual are for identification purposes only and cannot be used for ordering parts Obtain a parts list from the factory or a Viking distributor Always give the complete name of part part number and material with the model number and serial number of pump when ordering repair parts The unmounted pump or pump unit model nu
15. INTENANCE OF PUMP MAY CAUSE SERIOUS INJURY OR DEATH AND OR RESULT IN DAMAGE TO PUMP AND OR OTHER EQUIPMENT VIKING S WARRANTY DOES NOT COVER FAILURE DUE TO IMPROPER INSTALLATION OPERATION OR MAINTENANCE THIS INFORMATION MUST BE FULLY READ BEFORE BEGINNING INSTALLATION OPERATION OR MAINTENANCE OF PUMP AND MUST BE KEPT WITH PUMP PUMP MUST BE INSTALLED OPERATED AND MAINTAINED ONLY BY SUITABLY TRAINED AND QUALIFIED PERSONS THE FOLLOWING SAFETY INSTRUCTIONS MUST BE FOLLOWED AND ADHERED TO AT ALL TIMES Symbol Legend SECTION TSM 230 Danger Failure to follow the indicated N instruction may result in serious injury or death BEFORE opening any liquid chamber pumping chamber reservoir etc be sure that e Any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings or connections The pump drive system means motor turbine engine etc has been locked out or otherwise been made non operational so that it cannot be started while work is being done on the pump You know what material the pump has been handling have obtained a material safety data sheet MSDS for the material and understand and follow all precautions appropriate for the safe handling of the material BEFORE operating the pump be sure all drive guards are in place DO NOT operate pump if the suction or discharge piping is not connected DO NOT place fingers into the pump
16. Install the end cap into the bearing housing and secure with the end cap capscrews Adjust pump end clearance Refer to Thrust Bearing Adjustment page 14 MECHANICAL SEAL DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir etc Be sure 1 That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings or connections 2 That the driving means motor turbine engine etc has been locked out or made non operational so that it cannot be started while work is being done on pump 3 That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid Obtain a material safety data sheet MSDS for the liquid to be sure these precautions are understood Failure to follow above listed precautionary measures may result in serious injury or death WARNING DO NOT INSERT TOOLS IN THE VIEWING GAPS BETWEEN THE CASING AND BRACKET OR DAMAGE TO THE SHAFT SEAL AND BEARING WILL RESULT The seal used in this pump is simple to install and good performance will result if care is taken during installation The primary sealing area of a mechanical seal is between the faces of the rotary and stationary members These parts are lapped to a high finish and their sealing effectiveness depends on complete contact Never touch the sealing faces with anything except clean hands or clean cloth
17. Minute particles can scratch the seal faces and cause leakage SECTION TSM 230 ISSUE A PAGE 10 OF 15 Mechanical Seal Removal Use steps 1 2 4 6 10 and 12 13 from the disassembly procedures to remove the mechanical seal components The locknut does not need to be removed and the bearing housing does not need to be adjusted during seal removal The bracket and shaft may be left in place to eliminate shaft realignment after reassembly Mechanical Seal Installation Follow the rotary and stationary member installation instructions for the seal type used in the pump For mechanically sealed pumps use steps 24 31 from the assembly procedures to reassemble the pump For O ring sealed pumps use steps 8 13 and 15 17 from the assembly procedures to reassemble the pump As long as the thrust bearing was not adjusted the end clearance should still be set correctly Verify the end clearance and adjust if necessary before putting pump back into service If the locknut needs to be retightened or the end clearance needs to be adjusted follow the complete assembly procedures Do not tighten the locknut or make major gt 0 005 adjustments to the end clearance of mechanically sealed pumps while the seal is installed in order to avoid damaging the seal faces SINGLE MECHANICAL SEAL
18. RIER BUFFER FLUID FOR THE SEAL MUST BE COMPATIBLE WITH THE PRODUCT BEING PUMPED AND THE RELEVENT MATERIALS OF CONSTRUCTION OF THE PUMP SPECIAL CONSIDERATION MUST BE GIVEN TO THE TEMPERATURE LIMITATIONS OF THE BARRIER BUFFER FLUID TO ENSURE NO FIRE OR EXPLOSION HAZARDS ARE CREATED 1 Pumps with double seals and double O ring seals require a barrier buffer fluid The barrier buffer fluid must be connected and flowing whenever the pump is operated 2 The barrier buffer fluid must be supplied at a minimum flow rate of 0 13 gpm 0 5 Ipm 3 Fora buffer fluid the fluid should be unpressurized For a barrier fluid the fluid pressure must be a minimum of 15 psi 1 bar greater than the maximum pressure behind the rotor Due to the casing groove the pressure behind the rotor is equal to the suction pressure for the pump s primary rotation and the discharge pressure for the opposite rotation 5 To obtain maximum seal life use cool clean barrier buffer fluid Use warm or hot barrier buffer fluid if the pumped product sets up at room temperature 6 The barrier buffer fluid connections are shown in Figures 13 and 19 The NPT connection sizes for the barrier buffer fluid are 1 16 for H HL and 1 8 for KS LS Use the lower connection as the inlet and the higher connection as the outlet for the barrier buffer fluid PUMP ROTATION Hygienic Series pumps have a primary direction of rotation with an integral suckback groove to
19. S AND SHALL BE VIKING S SOLE AND EXCLUSIVE WARRANTY AND SHALL BE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ALL WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT ALL OF WHICH OTHER WARRANTIES ARE EXPRESSLY EXCLUDED See complete warranty at www vikingpump com A press must be used for installation Be certain bushing is started straight cracked If cracked the bushing will quickly disintegrate 3 Do not stop pressing operation until bushing is in proper Using a lubricant and adding a chamfer on the bushing and the position Starting and stopping will result in a cracked mating part will help in installation The additional precautions bushing listed below must be followed for proper installation Note 4 Check bushing for cracks after installation Bushings cannot be replaced in Acetal or PEEK idlers Silicon carbide bushings require a shrink fit Heat the 770 stainless idler to 450 F 232 C before installing a cool silicon carbide bushing LEER 8 2014 Viking Pump Inc FLUID amp METERING All rights reserved VIKING PUMP INC e A Unit of IDEX Corporation Cedar Falls IA 50613 USA
20. TENED AND THE END CLEARANCE CAN BE ADJUSTED ON PUMPS WITH O RING SEALS WHILE THE SEAL IS INSTALLED 1 Loosen the two set screws in the outer face of the bearing housing and turn the thrust bearing assembly clockwise until it can no longer be turned by hand Back off counter clockwise until the rotor shaft can be turned by hand with a slight noticeable drag This is zero end clearance TECHNICAL SERVICE MANUAL VIKING HYGIENIC SERIES HYGIENIC INTERNAL GEAR PUMPS SERIES 157B 4157B 257B amp 4257B SIZES H HL KS K KK LQ LL LS SECTION TSM 230 PAGE 15 OF 15 ISSUE A STAINLESS STEEL 2 For standard end clearance back off the thrust bearing assembly the required length measured on the outside diameter of the bearing housing See Table 3 VIKING 3 Tighten the two setscrews in the outboard face of the P UNIP A bearing housing with equal force against the bracket Your pump is now set with standard end clearances and locked WARRANTY NOTE Be sure the shaft can rotate freely If not back off ea A a ee aia additional length on outside diameter and check again period of one 1 year from date startup provided Best practice is to verify pump end clearance with a that in no event shall this warranty extend more than feeler gauge or a dial indicator eighteen 18 months from the date of shipment from 4 Operating the pump at higher temperatures or viscosities Viking The warranty period for Universal Seal series may require
21. additional end clearance Contact your local Viking representative for specific clearance recommendations The additional length on the outside diameter of the bearing housing for an extra 0 001 of end clearance is shown in Table 3 Additional Length On O D Brg Housing For 001 End Cl Turn Brg Housing Clearance Inch 0 008 1 3 8 11 64 0 010 1 7 8 3 16 TABLE 3 INSTALLATION OF BUSHINGS When installing carbon graphite and silicon carbide bushings extreme care must be taken to prevent breaking Carbon graphite and silicon carbide are brittle materials and easily pumps ONLY Universal Seal models listed below is three 3 years from date of startup provided that in no event shall this warranty extend more than forty two 42 months from the date of shipment from Viking UNDER NO CIRCUMSTANCES SHALL VIKING BE LIABLE UNDER THIS WARRANTY OR OTHERWISE FOR SPECIAL INCIDENTAL INDIRECT CONSEQUENTIAL OR PUNITIVE DAMAGES OF ANY KIND INCLUDING BUT NOT LIMITED TO LOST OR UNREALIZED SALES REVENUES PROFITS INCOME COST SAVINGS OR BUSINESS LOST OR UNREALIZED CONTRACTS LOSS OF GOODWILL DAMAGE TO REPUTATION LOSS OF PROPERTY LOSS OF INFORMATION OR DATA LOSS OF PRODUCTION DOWNTIME OR INCREASED COSTS IN CONNECTION WITH ANY PRODUCT EVEN IF VIKING HAS BEEN ADVISED OR PLACED ON NOTICE OF THE POSSIBILITY OF SUCH DAMAGES AND NOTWITHSTANDING THE FAILURE OF ANY ESSENTIAL PURPOSE OF ANY PRODUCT THIS WARRANTY I
22. e the nuts are tightened so the end clearance can be set accurately Insert length of plastic through port opening between rotor teeth to keep shaft from turning Torque locknut to value shown in Table 1 using a bearing locknut socket and a torque wrench Failure to tighten locknut could result in premature bearing failure and cause damage to pump Remove length of plastic from port opening The locknut needs to be tightened before the mechanical seal is installed to prevent damage to the seal faces Install the end cap into the bearing housing and secure with the end cap capscrews Adjust pump end clearance Refer to Thrust Bearing Adjustment page 14 The end clearance needs to be set before the mechanical seal is installed to prevent damage to the seal faces Remove the head nuts If pump has a jacketed head plate remove the jacketed head plate Remove head from pump Jack screw holes 1 4 20 for H KK 3 8 16 for LQ LS are included to assist with head removal Do not allow idler to fall from idler pin Tilt top of head back when removing to prevent this Secure casing during assembly by repeating step 9 Insert plastic bar through port opening between rotor teeth to keep shaft from turning Use the retainer socket tool to unscrew the rotor retainer Remove the rotor retainer cap See Figure 5 Under the rotor retainer cap are two drilled and tapped holes to assist in the removal of the rotor These holes do not extend throu
23. embly These nuts should be located on opposite sides of the casing A spacer or a couple of larger nuts will need to be used to compensate for the unthreaded section of the casing studs It is important the casing is secured during assembly to avoid damage to the pump internals Install the rotary member of the seal on the back of the rotor Refer to the additional seal installation instructions in the Mechanical Seal section page 10 Install the rotor onto the shaft by lining up the splines on both components Take care not to damage the seal O rings and ensure that the rotary seal insert does not slip out of position from the back of the rotor Coat threads of rotor retainer with food grade anti seize Install the rotor retainer cap O ring onto the rotor retainer cap Install the rotor retainer O ring onto the rotor retainer Install rotor retainer through the rotor retainer cap onto the rotor and shaft Insert length of plastic bar through port opening between rotor teeth to keep shaft from turning Torque the rotor retainer to value shown in Table 1 using the retainer socket tool It is critical that the rotor retainer be torqued properly Best practice is to use a calibrated impact wrench or an impact wrench with a properly sized torque stick Remove plastic bar from port opening See Figure 5 Place the idler pin O ring into the counterbore on the head Install the idler pin dowel pin into the idler pin Align the dowel pin with the
24. follow above listed precautionary measures may result in serious injury or death PRESSURE RELIEF 1 Hygienic Series pumps are not available with an integral pressure relief valve 2 Viking pumps are positive displacement pumps and must be provided with some sort of pressure protection This may be an inline pressure relief valve a torque limiting device or a rupture disk 3 If pump rotation is to be reversed during operation pressure protection must be provided on both sides of pump For additional information on pressure relief valves refer to Technical Service Manual TSM000 and Engineering Service Bulletin ESB 31 METAL DETECTABLE COMPOSITE IDLERS 1 Minimum detection limits will vary depending on individual customers equipment and operating conditions 2 Viking is not responsible for failure to detect components due to detector limitations and or detector malfunctions Refer to the metal detector manufacturer s design limitations instructions and warnings regarding the use limitations and proper maintenance of the equipment TEMPERATURE LIMITATIONS The standard Hygienic Series pumps have a maximum temperature limit of 225 F 107 C Pumps with optional PEEK and Acetal idlers are limited to 200 F 93 C and 125 F 52 C respectively Ensure that the temperature of the process liquid cleaning fluid and jacketing media does not exceed these temperature limits JACKETING On pumps with jacke
25. from pump Jack screw holes 1 4 20 for H KK 3 8 16 for LQ LS are included to assist with head removal Do not allow idler to fall from idler pin Tilt top of head back when removing to prevent this Remove the head O ring After removing the head use two nuts to hold the casing in place during disassembly These nuts should be located on opposite sides of the casing A spacer or a couple of larger nuts will need to be used to compensate for the unthreaded section of the casing studs It is important the casing is secured during disassembly to avoid damage to the pump internals Remove the idler pin capscrew Remove the idler pin idler pin dowel pin and idler pin O ring If the idler pin is difficult to remove from the head partially thread the idler pin capscrew back into the idler and use it to dislodge the idler pin from the head Insert plastic bar through port opening between rotor teeth to keep shaft from turning 230 ISSUE A PAGE 6 OF 15 10 11 12 13 14 15 16 For O ring sealed pumps remove the end cap of the bearing housing by removing the end cap capscrews and use a bearing locknut socket to turn the locknut counterclockwise and remove locknut See Figure 7 Do not loosen or remove locknut of mechanically sealed pumps while the seal is installed in order to avoid damaging the seal faces The locknut for mechanically sealed pumps will be removed in step 11 Use the retainer socket tool to unscrew
26. gh the rotor and are not designed for jackscrews If the rotor is not removable by hand use the gear puller tool in these holes to remove the rotor Before using the gear puller tool reinstall the rotor retainer to give the gear puller something to push against in order to avoid damaging the threads for the rotor retainer See Figure 6 Install the stationary member of the seal in the casing Refer to the additional seal installation instructions in the Mechanical Seal section page 10 The casing may need to be backed away or removed from the bracket to assist with installation of the seal Install the rotary member of the seal on the back of the rotor Refer to the additional seal installation instructions in the Mechanical Seal section page 10 Make sure casing is secure as described in step 9 Install the rotor onto the shaft by lining up the splines on both components Take care not to damage the seal faces and ensure that the faces do not slip out of position Coat threads of rotor retainer with food grade anti seize Install the rotor retainer cap O ring onto the rotor retainer cap Install the rotor retainer O ring onto the rotor retainer Install rotor retainer through the rotor retainer cap onto the rotor and shaft Insert length of plastic bar through port opening between rotor teeth to keep shaft from turning Torque the rotor retainer to value shown in Table 1 using the retainer socket tool It is critical that the rotor retai
27. h a loose rotor retainer It is critical that the rotor retainer be torqued properly to the value shown in Table 1 Best practice is to use a calibrated impact wrench or an impact wrench with a properly sized torque stick CLEANING Determine the on site pump cleaning schedule for the materials being processed and the plant maintenance schedule COP CLEAN OUT OF PLACE RECOMMENDATIONS Hygienic Series pumps are suitable for manual cleaning Please consider the following when manually cleaning a pump 1 Use steps 1 4 6 10 and 12 13 from the disassembly procedures to remove the wet end components The locknut does not need to be removed and the bearing housing does not need to be adjusted during the disassembly for cleaning The idler pin does not need to be removed from the head and the seal housing does not need to be removed from the casing unless the O ring material of the pump is not compatible with the cleaning solution For mechanically sealed pumps where the seal housing is not removed from the casing make sure the stationary face s stationary face O ring s and wave spring s are removed from the seal housing to avoid damaging the face s during cleaning The bracket and shaft may be left in place to eliminate shaft realignment after reassembly 2 Submerge and soak wet end components in Clean Out of Place tank with suitable cleaning solution Soak pump components only long enough to ensure adequate cleaning WARNING
28. hole or groove in the bore for the idler pin and install the idler pin into the head Secure the idler pin to the head using the idler pin capscrew Coat idler pin with light food grade oil and place idler and bushing on idler pin in head If replacing the idler bushing refer to Installation of Bushings page 15 Install the head studs in the casing if they are not already installed Use a suitable food grade threadlocker when installing the head studs in the casing Place the head O ring on the casing The head O ring may need to be stretched to fit onto the casing Install the head and idler assembly on pump Use the head alignment dowel pins to ensure proper reassembly Make sure the idler pin which is offset in the pump head is positioned equal distance between port connections to allow for proper flow of liquid through the pump Refer to idler pin placement shown in Pump Rotation page 13 If pump is equipped with a jacketed head plate install the jacketed head plate and a new jacketed head plate O ring SECTION TSM 230 ISSUE A PAGE 9 OF 15 17 Install the head nuts to secure the head to the casing 18 Insert length of plastic through port opening between rotor teeth to keep shaft from turning Torque locknut to value shown in Table 1 using a bearing locknut socket and a torque wrench Failure to tighten locknut could result in premature bearing failure and cause damage to pump Remove length of plastic from port opening 19
29. ing chamber or its connection ports or into any part of the drive train if there is any possibility of the pump shaft being rotated DO NOT exceed the pump s rated pressure speed and temperature or change the system duty parameters from those the pump was originally supplied without confirming its suitability for the new service BEFORE operating the pump be sure that e Itis clean and free from debris e All valves in the suction and discharge pipelines are fully opened e All piping connected to the pump is fully supported and correctly aligned with the pump e Pump rotation is correct for the desired direction of flow ISSUE A PAGE 2 OF 15 Warning In addition to possible serious injury or death failure to follow the indicated instruction may cause damage to pump and or other equipment INSTALL pressure gauges sensors next to the pump suction and discharge connections to monitor pressures USE extreme caution when lifting the pump Suitable lifting devices should be used when appropriate Lifting eyes installed on the pump must be used only to lift the pump not the pump with drive and or base plate If the pump is mounted on a base plate the base plate must be used for all lifting purposes If slings are used for lifting they must be safely and securely attached For weight of the pump alone which does not include the drive and or base plate refer to the Viking Pump product catalog AVOID contact with h
30. mber and serial number are on the nameplate In the Viking model number system basic size letters are combined with series number 157B 4157B 257B 4257B indicating basic pump construction material This manual deals only with Series 157B 4157B 257B and 4257B hygienic pumps Refer to Figures 1 through 22 for general configuration and nomenclature used in this manual Pump specifications and recommendations are listed in Catalog Section 230 Viking Hygienic Series Hygienic Internal Gear Pumps LEER FLUID amp METERING SECTION TSM 230 PAGE 1 OF 15 ISSUE A VIKING HYGIENIC SERIES STAINLESS STEEL UNMOUNTED PUMP NON JACKETED JACKETED ORING MECH ORING MECH SEAL SEAL SEAL SEAL H257B H4257B H157B H4157B HL157B HL4157B HL257B HL4257B KS157B KS4157B KS257B KS4257B K157B K4157B K257B K4257B KK157B KK4157B KK257B KK4257B LQ157B LQ4157B LQ257B LQ4257B LL257B LL4257B LL157B LL4157B LS157B LS4157B LS257B LS4257B UNITS Units are designated by the un mounted pump model numbers followed by a letter indicating drive style V V Belt D Direct Connected R Viking Speed Reducer P Commercial Speed Reducer or Gearmotor FIGURE 1 NON JACKETED HYGIENIC SERIES FIGURE 2 JACKETED HYGIENIC SERIES VIKING PUMP INC A Unit of IDEX Corporation Cedar Falls IA 50613 USA SAFETY INFORMATION AND INSTRUCTIONS IMPROPER INSTALLATION OPERATION OR MA
31. nch Spanner wrench adjustable pin type for use on bearing housing Source 482 J H Williams amp Co or equal 8 Plastic bar 9 Impact wrench calibrated or with torque stick 10 Arbor press DRILLED IDLERS Some Hygienic Series pumps use a drilled idler and bushing For replacement parts Viking recommends purchasing the complete drilled idler and bushing subassembly from your local Authorized Viking Pump Distributor SECTION TSM 230 ISSUE A PAGE 3 OF 15 PREVENTIVE MAINTENANCE Every 6 months or every 2 000 hours of operation whichever occurs first Re torque rotor retainer to recommended torque value in Table 1 Every 12 months 1 Replace outer ball bearing 2 Replace all O rings including the idler pin O ring 3 Inspect and measure pump internals including the idler pin idler idler bushing rotor shaft inner ball bearing casing and seal Replace as necessary Pump Inspection Reports can be obtained from your local Authorized Viking Pump Distributor INSPECTION OF SHAFT AND ROTOR SPLINE Each time the pump is disassembled the spline area of the shaft and rotor should be visually inspected If the spline of the rotor or shaft is damaged or worn replace the damaged or worn part If the shaft shoulder next to the spline area has a sharp edge use a fine emery cloth to remove the sharp edge to avoid damaging the seal Wear to the shaft shoulder and the back of the rotor is caused by operating the pump wit
32. ner be torqued properly Best practice is to use a calibrated impact wrench or an impact wrench with a properly sized torque stick Remove plastic bar from port opening See Figure 5 28 29 30 31 32 Remove the two nuts securing the casing Coat idler pin with light food grade oil and place idler and bushing on idler pin in head If replacing the idler bushing refer to Installation of Bushings page 15 Install the head studs in the casing if they are not already installed Use a suitable food grade threadlocker when installing the head studs in the casing Place the head O ring on the casing The head O ring may need to be stretched to fit onto the casing Install the head and idler assembly on pump Use the head alignment dowel pins to ensure proper reassembly Make sure the idler pin which is offset in the pump head is positioned equal distance between port connections to allow for proper flow of liquid through the pump Refer to idler pin placement shown in Pump Rotation page 13 If pump is equipped with a jacketed head plate install the jacketed head plate and a new jacketed head plate O ring Install the head nuts to secure the head to the casing After the pump is fully assembled with the mechanical seal installed verify the end clearance with a feeler gauge and adjust if necessary before putting pump into service Only minor adjustments to the end clearance of less than 0 005 can be made while the mechanical
33. ot areas of the pump and or drive Certain operating conditions temperature control devices jackets heat tracing etc improper installation improper operation and improper maintenance can all cause high temperatures on the pump and or drive THE PUMP must be provided with pressure protection This may be provided through an in line pressure relief valve a torque limiting device or a rupture disk If pump rotation may be reversed during operation pressure protection must be provided on both sides of pump For additional information refer to Viking Pump s Technical Service Manual TSM 000 THE PUMP must be installed in a matter that allows safe access for routine maintenance and for inspection during operation to check for leakage and monitor pump operation SPECIAL INFORMATION DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir etc Be sure 1 That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings or connections 2 That the driving means motor turbine engine etc has been locked out or made non operational so that it cannot be started while work is being done on pump 3 That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid Obtain a material safety data sheet MSDS for the liquid to be sure these precautions are understood Failure to
34. r retainer cap onto the rotor Coat threads of rotor retainer with food grade anti seize Secure in place using the rotor retainer Insert length of plastic bar through port opening between rotor teeth to keep shaft from turning Torque the rotor retainer to value shown in Table 1 using the retainer socket tool It is critical that the rotor retainer be torqued properly Best practice is to use a calibrated impact wrench or an impact wrench with a properly sized torque stick Remove plastic bar from port opening See Figure 5 Remove the two nuts added in step 9 Place the idler pin O ring into the counterbore on the head Install the idler pin dowel pin into the idler pin Align the dowel pin with the hole or groove in the bore for the idler pin and install the idler pin into the head Secure the idler pin to the head using the idler pin capscrew Coat idler pin with light food grade oil and place idler and bushing on idler pin in head If replacing the idler bushing refer to Installation of Bushings page 15 Install the head studs in the casing Use a suitable food grade threadlocker when installing the head studs in the casing Install the head and idler assembly on pump If 230 ISSUE A PAGE 8 OF 15 16 17 18 19 20 21 22 23 24 25 26 27 pump is equipped with a jacketed head plate install the jacketed head plate at this time Install the head nuts to secure the head to the casing Make sur
35. seal is installed Refer to Thrust Bearing Adjustment page 14 If major gt 0 005 adjustments to the end clearance are necessary remove the mechanical seal before adjusting the end clearance Seal removal instructions are listed in the Mechanical Seal section page 10 Once the seal is removed repeat the assembly procedures starting at step 8 to adjust the end clearance and reassemble the pump ASSEMBLY FOR O RING SEALED PUMPS 1 On jacketed pumps install jacket tubing onto the bracket by squeezing the tubing between the slots of the bracket flange Make sure that the tubing does not extend past the flange surface and interfere with installation of the casing Use an arbor press to install the inner single row ball bearing onto the shaft Refer to Disassembly and Installation of Inner Ball Bearing page 14 The inner bearing in this pump is a Sealed for Life bearing that has seals on both sides This bearing can be installed either side first and does not need to be packed with grease Coat the shaft with light food grade oil Install the shaft and bearing into the bracket from the pump end Install the outer ball bearing into the bearing housing The outer ball bearing is a Sealed for Life bearing that has seals on both sides This bearing can be installed either side first and does not need to be packed with grease Do not install the end cap See Figure 7 Start the thrust bearing assembly into the bracket Use
36. sing groove needs to be used as the suction port for the pump s primary rotation 2 Differential pressure must be created across the pump during the cleaning process in order to force the cleaning solution through the clearances of the pump A differential pressure of 15 to 30 psi 1 to 2 bar across the pump during the cleaning process is adequate for most applications 3 The velocity of the cleaning solution must be sufficient to clean the entire system A velocity of 5 ft sec 1 5 m s in a pipe of equal diameter to the pump port connections is adequate for most applications For example in a pump with 2 ports the flow rate needs to be 49 gpm 185 Ipm An additional CIP supply pump may be used if the pump cannot meet the CIP velocity requirements 4 Itis recommended that the pump rotates during the CIP process to increase turbulence which will assist with the cleaning process WARNING IF STEAM IS USED DURING THE CIP CYCLE THE PUMP SHOULD NOT BE ALLOWED TO ROTATE DURING THE STEAMING PROCESS 5 Ensure that the cleaning solution is compatible with all of the pump materials SOILED ROTOR RETAINER CLEANING PROCEDURES 1 Use steps 1 4 and 6 8 from the disassembly procedures to remove the rotor retainer components 2 If rotor retainer blind tapped hole is soiled submerge and soak rotor retainer for 5 minutes in Clean Out of Place tank with suitable cleaning solution 3 Scrub both external and internal threads
37. ted features the maximum pressure limit for the jacketing is 225 psi The maximum allowable temperature for the jacketing follows the guidelines of the temperature limitations section MAINTENANCE Hygienic Series pumps are designed for long trouble free service life under a wide variety of application conditions with a minimum of maintenance The points listed below will help provide long service life LUBRICATION No external lubrication is required The H LS Hygienic Series uses Sealed for Life bearings that use food grade grease with seals on both sides CLEANING PUMP Keep the pump as clean as possible This will facilitate inspection adjustment and repair work Avoid spraying water or cleaning fluid directly at bearing housing STORAGE If the pump is not required for immediate installation it should be stored in a clean dry environment It is recommended that storage temperature should be between 14 F and 105 F 10 and 40 C SUGGESTED REPAIR TOOLS The following tools must be available to properly repair Hygienic Series pumps These tools are in addition to standard mechanics tools such as open end wrenches pliers screwdrivers etc Most of the items can be obtained from an industrial supply house 1 Soft headed hammer Allen wrenches Retainer socket tool supplied with pump Gear puller tool SP ON Bearing locknut socket Source Whittet Higgins BAS Series or equal D Torque wre
38. the rotor retainer Turn counter clockwise to loosen clockwise to tighten Remove the rotor retainer O ring rotor retainer cap and rotor retainer cap O ring See Figure 5 Inspect the rotor retainer blind tapped hole for contamination If soiled refer to the soiled rotor retainer cleaning procedures ROTOR RETAINER CAP O RING ROTOR RETAINER CAP ROTOR RETAINER O RING Op retainer FIGURE 5 ROTOR RETAINER ASSEMBLY Remove plastic bar from port opening Under the rotor retainer cap are two drilled and tapped holes to assist in the removal of the rotor These holes do not extend through the rotor and are not designed for jackscrews If the rotor is not removable by hand use the gear puller tool in these holes to remove the rotor Before using the gear puller tool reinstall the rotor retainer to give the gear puller something to push against in order to avoid damaging the threads for the rotor retainer See Figure 6 The rotary member of the seal will be removed with the rotor Take care not to damage the seal components when removing the rotor Remove the seal rotary member after the rotor has been removed from the casing For mechanically sealed pumps remove the stationary face s and wave spring s from the seal housing Take care not to damage the stationary face s For mechanically sealed pumps reinstall the rotor onto the shaft by lining up the splines on both components Insert plastic bar through port opening be
39. tween rotor teeth to keep shaft from turning Remove the end cap of the bearing housing by removing the end cap capscrews Use a bearing locknut socket to turn the locknut counterclockwise and remove locknut Remove the plastic bar from port opening Remove the rotor from the casing as described in step 9 Remove the two nuts added in step 2 Remove the casing Remove the seal housing from the casing Remove the anti rotation washer from the casing Remove the shaft from the pump Remove the inner single row ball bearing from the shaft if the bearing needs to be replaced Refer to Disassembly and Installation of Inner Ball Bearing page 14 Make sure bearings are clean and then check for roughness Roughness can be determined by turning outer race by hand Replace bearings if necessary Be sure the shaft is free from nicks burrs and foreign particles that might damage the mechanical seal Scratches on the shaft in the seal area will provide leakage paths under the mechanical seal Use a fine emery cloth to remove scratches or sharp edges ASSEMBLY DANGER BEFORE STARTING PUMP BE SURE ALL DRIVE EQUIPMENT GUARDS ARE IN PLACE FAILURE TO PROPERLY MOUNT GUARDS MAY RESULT IN SERIOUS INJURY OR DEATH It is recommended that new O rings be used for reassembly of the pump All O rings should be lightly lubricated with an appropriate lubricant that is suitable for the application before installing Hole Spacing A
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