TECHNICAL SERVICE MANUAL
Contents
1. SHAFT IDLER PIN A T i a TECN D 7 7 ra ROTOR RELIEF VALVE Si Tm i END a IN i 2 CAPS Tn b a Ey w THRUST BEARING HOUSING PACKING BEARING HOUSING ROTOR cea STAND BEARING SLEEVE RELIEF VALVE ADJUSTING SCREW CAP IDLER BUSHING FIGURE 3 CUTAWAY FROM PACKED PUMP MODEL N337 SECTION TSM 163 ISSUE D PAGE 3 OF 15 PACKED PUMPS Model N and R337 FA 49 62 G0 64 3 64 65 Go FIGURE 4 SECTIONAL VIEW MODELS N AND R337 Dr Yoo Pe occas ae Ponce 3 en as remain a E bui E3 EI Ea ae Bushing Rotor Bearing Sleeve Casing Rotor and Shaft Lip Seal Idler Pin Head and Idler Pin Nut for Head EF Roller Bearing 9 Grease Fitting ga Thrust Bearing Housing Stud for Head Capscrew for Valve Packing Gland Rotor Bearing Sleeve amp Bushing Idler Pin Nut Not N Head Gasket Internal Relief Valve 38 Relief Valve Gasket Pipe Plug SECTION TSM 163 ISSUE D PAGE 4 OF 15 DISASSEMBLY DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir relief valve adjusting cap fitting 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 That the driving means motor turbine engine etc has been locked out or made non operational so that it cannot2. Install bearing spacer collar on shaft next to inner race of roller bearing Turn inner end cap into thrust bearing housing just far enough to hold in place Install outer end cap and turn in approximately halfway Insert length of hardwood or brass bar through port opening between rotor teeth to keep rotor from turning Install lockwasher with tang in keyway on shaft Tighten locknut to 170 190 ft Ibs Torque Bend one tang of lock washer into slot of locknut If tang does not line up with slot tighten locknut until it does Failure to tighten locknut or engage lockwasher tang could result in early bearing failure and cause damage to rest of pump Bend one tang of lockwasher into slot of locknut Remove the length of hardwood or brass bar from port opening Lubricate all grease fittings with multi purpose grease NLGI 2 Adjust pump end clearance Refer to THRUST BEARING AND IDLER END CLEARANCE ADJUSTMENT FIGURE 16 ISSUE D PAGE 12 OF 15 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 THRUST BEARING AND IDLER END CLEARANCE ADJUSTMENT Use spanner wrench provided with pump and turn outer end cap until rotor is tight against head and rotor shaft cannot be turned With pencil or chalk make reference mark on bearing housing and outer end cap Back off outer end cap approximately 4 holes One ho
3. 16 17 18 19 20 Install the bearing spacer collar on the shaft next to the inner race of the roller bearing Turn the inner end cap into the thrust bearing housing just far enough to hold in place Install the outer end cap and turn in approximately half way Insert a length of hardwood or brass bar through the port opening between the rotor teeth to keep the rotor from turning Install the lockwasher placing tang in the keyway on the shaft Tighten the locknut to 170 190 ft Ibs Torque Bend one tang of lock washer into slot of locknut If tang does not line up with slot tighten lock nut until it does Failure to tighten locknut or engage the lock washer tang could result in early bearing failure and cause damage to rest of pump Remove the length of hardwood or brass bar from the port opening Install the nuts on the packing gland studs and tighten Do not over tighten as it may cause bind on rotor shaft Reinstall the suckback tubing to the casing and rotor bearing sleeve Lubricate all grease fittings with multi purpose grease NLGI 2 Adjust the pump end clearance Refer to THRUST BEARING AND IDLER END CLEARANCE ADJUSTMENT page 12 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 SECTION TSM 163 ISSUE D PAGE 7 OF 15 MECHANICAL SEAL PUMPS Models N and R4337 fini AS Si ral
4. for end Refer to Figure 2 below 5 Pressure relief valves cannot be used to control the pump flow or regulate discharge pressure For additional information on pressure relief valves refer to Technical Service Manual TSM000 and Engineering Service Bulletin ESB 31 INLET OUTLET OR OR SUCTION SUCTION RELIEF VALVE ADJUSTING SCREW FIGURE 2 SECTION TSM 163 ISSUE D PAGE 2 OF 15 SPECIAL MECHANICAL SEALS can be installed in a modified stuffing box Extra care must be taken in repair of pumps with mechanical seals Read and follow all special information supplied with the pump MAINTENANCE Series 337 and 4337 pumps are designed for long trouble free life under a wide variety of application conditions with a minimum of maintenance The points listed below will help provide long service life LUBRICATION External lubrication must be applied slowly with a handgun to all lubrication fittings every 500 hours of operation with multi purpose grease NLGI 2 Do not over grease Applications involving very high or low temperatures will require other types of lubrication Refer to Engineering Service Bulletin ESB 515 Consult factory with specific lubrication questions PACKING ADJUSTMENT New packed pumps require initial packing adjustment to control leakage as packing runs in Make initial adjustments carefully and do not over tighten packing gland After initial adjustment inspection will reveal the need for
5. Figure 18 below Place a 0 010 shim stock between the idler bushing and the head This provides 0 010 of end clearance between the ends of the idler bushing and the mating surfaces head and idler pin locknut Install idler pin locknut and turn clockwise until it touches the idler bushing Tighten the three setscrews in the face of the idler pin locknut to lock it against the idler pin Remove the 0 010 shim stock 0 010 SHIM STOCK IDLER PIN LOCKNUT SETSCREWS 3 FIGURE 18 INSTALLATION OF CARBON GRAPHITE BUSHINGS When installing carbon graphite bushings extreme care must be taken to prevent breaking Carbon graphite is a brittle material and easily cracked If cracked the bushing will quickly disintegrate Using a lubricant and adding a chamfer on the bushing and the mating part will help with installation The additional precautions listed below must be followed for proper installation 1 Apress must be used for installation 2 Be certain the bushing is started straight 3 Do not stop the pressing operation until the bushing is in the proper position starting and stopping will result in a cracked bushing 4 Check the bushing for cracks after installation Carbon graphite bushings with extra interference fits are frequently furnished for high temperature operation These bushings must be installed by a shrink fit 1 Heat the rotor bearing sleeve or idler to 750 F 2 Install cool bushings with
6. packing gland adjustment or packing replacement Refer to instructions under DISASSEMBLY page 5 and Assembly page 6 regarding repacking the pump CLEANING PUMP Keep the pump as clean as possible This will facilitate inspection adjustment and repair work and help prevent overlooking a dirt covered grease fitting STORAGE f the pump is to be stored or not used for six months or more pump must be drained and a light coat of non detergent SAE 30 weight oil must be applied to all internal pump parts Lubricate fittings and apply grease to the pump shaft extension Viking suggests rotating the pump shaft by hand one complete revolution every 30 days to circulate the oil SUGGESTED REPAIR TOOLS The following tools must be available to properly repair Series 337 and 4337 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 2 Allen Wrenches some mechanical seals and set collars 3 Packing hooks flexible packed pumps Large for 0 375 inch and up cross section packing 4 Bearing locknut spanner wrench Source 471 J H Williams amp Co or equal 5 Spanner wrench Supplied with pump Viking Part Number 3 810 009 631 Brass Bar Arbor Press ROTOR BEARING SLEEVE GASKET HEAD ROLLER PACKING ROTOR BEARING CASING GASKET HEAD BEARINGS GLAND SLEEVE BUSHING
7. rotor shaft through the casing into the bushing slowly turn rotor from right to left while pushing into casing When the shaft first protrudes from stuffing box stop pushing Check to see if the large diameter of the shaft has protruded far enough into rotor bearing sleeve to permit installing packing rings Use packing suitable for the liquid being pumped Lubricate packing rings with oil grease or graphite to aid assembly Packing ring joints should be staggered from one side of shaft to the other A length of pipe will help set each packing ring Place the packing gland and inner end cap position spanner wrench holes on side next to packing gland with lip seal lip facing away from packing gland over the end of the shaft Push the rotor far into the casing as far as it will go Prior to installing the head coat the casing face with thread sealant pipe dope and place a new 015 head gasket on the mounting studs Coat the dry side of gasket with thread sealant pipe dope and prepare to mount the head and idler assembly The pump head and casing were marked before disassembly to ensure proper reassembly If not be sure idler pin which is offset in the pump head is positioned toward and equal distance between the port connections to allow for proper flow of liquid through the pump Place the head on the pump slightly tilting the top of the head back away from casing until the crescent enters the inside diameter of rotor
8. the head back away from casing until the crescent enters inside diameter of the rotor Rotate the idler on idler pin until the idler teeth mesh with the rotor teeth Raise the head until the face of head is parallel with the face of casing and then work into position Care must be taken to avoid damaging the head gasket Fasten the head to casing with head nuts and tighten evenly If the relief valve was removed from the head install on head with the adjusting screw cap pointed toward suction port Refer to figure 15 For PRESSURE RELIEF VALVE INSTRUCTIONS refer to page 14 INLET OUTLET OR OR SUCTION SUCTION ADJUSTING RELIEF VALVE SCREW FIGURE 15 Push the rotor back against the head Install the drain plug in the casing Wipe the shaft clean in seal area and thoroughly coat with non detergent SAE 30 weight oil Before installing parts contained in the mechanical seal refer to figure 14 page 10 to become familiar with part name and location in packing box extension 10 11 12 13 14 15 16 17 18 A tapered seal installation sleeve for N amp R size pumps is available at extra cost from Viking pump Division Coat the large diameter of shaft tapered sleeve and inside of diameter of seal with non detergent SAE 30 weight oil Place the tapered installation sleeve if on hand and install the seal on the shaft over the tapered sleeve Position the seal on the shaft inside the rot
9. D 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 IS 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 All rights reserved 3 2013 Viking Pump Inc
10. Electronic copies of the most current TSM issue can be found on the Viking Pump website at www vikingpump com TECHNICAL SERVICE MANUAL STAINLESS STEEL HEAVY DUTY PUMPS CONTENTS Introduction scs Skee oe al mok aae a we DH al ig 1 Special Information 0 1 Maintenance 000000 0s 2 Packed Pumps 00004 3 Mechanical Seal Pumps 8 Optional PTFE Seal 13 Thrust Bearing Adjustment 14 Installation of Carbon Graphite Bushings 14 Pressure Relief Valve Instructions 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 representative Always give complete name of part part number and material with model number and serial number of pump when ordering repair parts The unmounted pump or pump unit model number and serial number are on the nameplate In the Viking model number system basic size letters are combined with series number 337 and 4337 are used to indicate either an unmounted pump or mounted pump unit Model Chart Number UNMOUNTED PUMP UNITS PACKED MECH SEAL Units are designated by the unmounted pump model N337 N4337 numbers followed by a letter s indicating drive style Roa R4337 P Commercial Speed Reducer This manual deals only with Series 337 and 4337 Stainless Steel Heavy Dut
11. Rotate the idler on idler pin until the idler teeth mesh with the rotor teeth Raise head until the face of the head is parallel with face of the casing and work into position Care must be taken to avoid damaging the head gasket Fasten the head to casing with nuts and tighten evenly If relief valve was not removed from head install on head with adjusting screw cap pointed toward such port Refer to Figure 2 page 2 For PRESSURE RELIEF INSTRUCTIONS refer to page 14 7 10 Push the rotor back against the head Install the drain plug in the casing Place packing retainer washer in bottom of packing chamber and pack pump with new packing Use packing suitable for liquid being pumped Install packing staggering the joints from one side of the shaft to the other Lubricate packing rings with oil grease or graphite to aid assembly A length of pipe will help to seat each packing ring Refer to Figure 8 below Install the thrust bearing housing on the end of rotor ring sleeve and tighten the nuts and capscrews securely It is not necessary to use gasket between these parts gt C B NONDA ALIAL VISA FIGURE 8 STUFFING BOX DIMENSIONS PUMP AT me mm N337 O 34 11 Insert both tapered roller bearings in the thrust bearing housing large end of inner races together It is possible to install bearings incorrectly for proper assembly refer to Figure 9 below FIGURE 9 12 13 14 15
12. SCREWS FIGURE 11 THREAD SIZE 0 50 13 NC 0 63 11 NC FIGURE 12 MINIMUM LENGTH OF JACK SCREWS Insert a length of hardwood or brass through the port opening between the rotor teeth to keep the shaft from turning Bend the tang on the lockwasher up and with a spanner wrench remove the locknut and lockwasher from the shaft Refer to figure 13 below LOCKWASHER WITH TANG LOCKNUT FIGURE 13 Remove the length of hardwood or brass bar from the port opening Cushion the end of the shaft with a hardwood block or piece of brass and drive the rotor out of the casing being careful to avoid damaging rotor bearing sleeve bushing Support the weight of rotor with a hoist A cable sling can be used around the shaft or around the rotor teeth to carry the weight of the part SECTION TSM 163 ISSUE D PAGE 9 OF 15 10 11 12 13 14 15 SECTION TSM 163 Loosen the end cap lockscrews disengage the end cap locks and with a spanner wrench remove the end caps Examine the lipseal and replace if worn Remove the roller bearings Remove the nuts and capscrews and take off thrust bearing housing Check the rotor bearing sleeve bushing while the rotor bearing sleeve is mounted on the casing If worn the bushing must be replaced A press must be used to remove the old bushing If the bushing has a shoulder on the stuffing box end it must be pressed out from the mechanical seal end of the rotor bear
13. a press 3 If facilities are not available to reach 750 F temperature it is possible to install with 450 F temperature however the lower the temperature the greater the possibility of cracking the bushing Consult factory with specific questions on high temperature applications Refer to Engineering Service Bulletin ESB 3 SECTION TSM 163 ISSUE D PAGE 13 OF 15 PRESSURE RELIEF VALVE INSTRUCTIONS esa teens UO FIGURE 19 Sizes N and R LIST OF PARTS Valve Cap Valve Body Adjusting Screw Lock Nut Spring Guide Valve Spring Poppet Cap Gasket Bonnet Bonnet DISASSEMBLY DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir relief valve adjusting cap fitting 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 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 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 SECTION TSM 163 ISSUE D PAGE 14 OF 15 Mark valve and hea
14. be started while work is being done on pump That you know what 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 liquid the Failure to follow above listed precautionary measures may result in serious injury or death Mark the head and casing before disassembly to ensure proper reassembly The idler pin which is offset in pump head must be positioned towards and equal distance between the port connections to allow for proper flow of liquid through pump It is not necessary to remove relief valve to take head off pump however removing relief valve will lessen total weight of part Do not use chain or cable around relief valve body to support the head during removal For PRESSURE RELIEF VALVE INSTRUCTIONS refer to page 14 Remove nuts from the head Jackscrews should be used to back head away from casing Refer to figure 5 Proper size and length of jackscrews for pump size are shown in figure 6 The use of a hoist to support head will facilitate its removal Back the head away from casing Remove the head from pump Do not allow the idler to fall from the idler pin To prevent this tilt the top of head back when removing If a hoist is not available cribbing or blocking can be used to support head This will eliminate having to lift head into position when reassembling pump Remove th
15. be used to remove the old bushing If bushing has a shoulder on the stuffing box end it must be pressed out from the packing end of rotor bearing sleeve If bushing is carbon graphite refer to INSTALLATION OF CARBON GRAPHITE BUSHINGS page 13 SECTION TSM 163 ISSUE D PAGE 5 OF 15 SECTION TSM 163 LOCKWASHER WITH TANG LOCKNUT FIGURE 7 12 Clean all parts thoroughly and examine for wear and damage Check the idler bushing and idler pin replace if necessary If the idler pin is to be replaced the oil groove must be installed facing center of the crescent on the head If lipseals need replacement press in the end cap with the lip facing the end of the shaft If the idler bushing is to be replaced a press must be used to remove the old bushing and install the new one The bushing position after being pressed in should be flush with the face of the idler For a carbon graphite idler bushing refer to INSTALLATION OF CARBON GRAPHITE BUSHINGS page 13 NOTE R idler bushings are shrink fit Wash the anti friction bearings roller bearings in clean solvent Blow out the bearings with compressed air Do not allow the bearings to spin turn the bearings slowly by hand Spinning the bearings will damage the race and rollers Make sure the bearings are clean then lubricate with non detergent SAE 30 weight oil and check for roughness Roughness can be determined by turning the outer race by hand CAUTION do not intermi
16. d before disassembly to ensure proper reassembly 1 Remove the valve cap 2 Measure and record the length of extension of adjusting screw Refer to A on Figure 19 3 Loosen the locknut and back out the adjusting screw until the spring pressure is being released 4 Remove the bonnet spring guide spring and poppet from the valve body Clean and inspect all parts for wear and damage and replace as necessary ASSEMBLY Reverse the procedures outlined under DISASSEMBLY If the valve is removed for repairs be sure to replace in the same position The relief valve adjusting screw cap must always point towards suction side of the pump If pump rotation is reversed remove the relief valve and turn end for end Refer to Figure 20 below 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 INLET OUTLET OR OR SUCTION SUCTION RELIEF VALVE ADJUSTING SCREW FIGURE 20 TECHNICAL SERVICE MANUAL STAINLESS STEEL HEAVY DUTY PUMPS PRESSURE ADJUSTMENT If a new spring is installed or if the pressure setting of the pressure relief valve is to be changed from that which the factory has set the following instructions must be carefully followed 1 Carefully remove the valve cap which covers the adjusting screw Loosen the locknut which locks adjusting screw so the pressure setting will not change dur
17. e head gasket idler and bushing assembly Remove the pipe plug from the drain hole in the casing this breaks the vacuum behind rotor Remove the packing gland nuts and slide the gland out of the rotor bearing sleeve 10 11 JACKSCREWS FIGURE 5 THREAD SIZE THIN us 0 50 13 NC 0 63 11 NC FIGURE 6 MINIMUM LENGTH OF JACK SCREWS Insert length of hard wood or brass bar through the port opening between the rotor teeth to keep the shaft from turning Bend the tang on the lock washer up and with a spanner wrench remove locknut and lockwasher from the shaft Refer to figure 7 page 6 Remove the length of hardwood or brass bar from the port opening Cushion the end of the shaft with a hardwood block or piece of block and drive the rotor out of casing being careful to avoid damaging the rotor bearing sleeve bushing Support the weight of rotor with a hoist A cable sling can be used around the shaft or around rotor teeth to carry weight of the part Loosen the end cap lockscrews disengage the end cap locks and with a spanner wrench remove the end caps Remove the roller bearings Remove the nuts and capscrews and take off the thrust bearing housing Remove the packing from the rotor bearing sleeve Check the rotor bearing sleeve bushing while the rotor bearing sleeve is mounted on the casing If worn the bushing must be replaced Remove the rotor bearing sleeve from casing A press must
18. ed not be replaced When making major repairs such as replacement of a rotor it is usually considered advisable to install a new head and idler When making minor repairs when only an idler bushing and idler pin are required other new parts are usually not necessary Inspect the mechanical seal for wear or damage Refer to figure 14 for mechanical seal list of parts In general if the pump has been operated long enough to exhibit other worn parts it is likely the seal will have to be replaced Replacing individual seal parts is not recommended i e a used seal washer will not perform satisfactorily when run against a new stationary seat ISSUE D PAGE 10 OF 15 FIGURE 14 PTFE Fitted Mechanical Seal Assembly For Models N R4333 4335 amp 4337 Retainer Cartridge Springs PTFE Shaft Ring wedge Rotating Face washer Stationary Seal Seat Seat Gaskets Seal Mounting Parts DARN Packing box extension Packing box extension gasket Seal plate Flush openings gow ASSEMBLY PTFE Fitted Type Prepare all parts for reassembly ahead of time Pack roller bearings with multi purpose grease NLGI 2 and have all new gaskets on hand Three components are furnished in mechanical seal assembly Refer to figure 14 item numbers 1 thru 6 1 2 3 The rotating assembly in which a retainer cartridge encloses a spring loaded PTFE shaft ring and polished rotating face Set screws located around the outside
19. ent the casing and rotor bearing sleeve from tilting down while the rotor is being installed Check the casing to be sure the drain plug has been removed Coat the inner diameter of the rotor bearing sleeve bushing with a thin coat of non detergent SAE30 weight oil Support the weight of the rotor with a hoist A cable sling can be used around the shaft or around rotor teeth to carry weight of part while being assembled into the casing Place the end of rotor shaft through casing into bushing Do not allow any portion of the shaft to strike the bushing A carbon graphite bushing can be severely damaged if struck Slowly turn the rotor from right to left while pushing into the casing Push the rotor as far into casing as it will go Prior to installing the head coat the casing face with thread sealant pipe dope and place a new 015 inch head gasket on the mounting studs Coat the dry side of the gasket with thread sealant pipe dope and prepare to mount the head and idler assembly The pump head and casing were marked before disassembly to ensure proper reassembly If not be sure the idler pin which is off set in the pump head is positioned toward and equal distance between the port connections to allow for an even flow of liquid through the pump NOTE The R4337 pump has a special idler arrangement refer to section THRUST BEARING AND IDLER END CLEARANCE ADJUSTMENT page 12 Place the head on pump slightly tilting top of
20. ing elements gear teeth come out of mesh FLUSH LINES mechanically sealed pumps have a flush connection from the seal chamber to the discharge port as standard equipment and must be hooked up properly If the pump rotation is reversed be sure the flush connections are hooked up to the suction or discharge port as noted above to avoid excessive leakage or damage to pump If the pump is handling heated product be sure the flush line is insulated to assure continued flow Jacketed head R only optional on N size and rotor bearing sleeve provide large chambers at both ends of the pumping chamber for temperature control of product in pump These features do not alter basic steps in the disassembly and assembly of your pump PRESSURE RELIEF VALVES 4 Viking pumps are positive displacement pumps and must be provided with some sort of pressure protection This may be a relief valve mounted directly on the pump an inline pressure relief valve a torque limiting device or a rupture disk 2 Relief valve options are available on these pumps Options include plain and jacketed relief valvs N size pumps with a jacketed head are not available with a relief valve 3 If the pump rotation is to be reversed during operation pressure protection must be provided on both sides of pump 4 Relief valve adjusting screw cap must always point towards suction side of pump If pump rotation is reversed remove the pressure relief valve and turn end
21. ing operation of pump 2 Install a pressure gauge in discharge line for actual adjustment operation 3 Turn adjusting screw in to increase pressure and out to decrease pressure 4 With discharge line closed at a point beyond pressure gauge gauge will show maximum pressure valve will allow while pump is in operation IMPORTANT In ordering parts for pressure relief valve always give model number and serial number of pump as it appears on nameplate and name of part wanted When ordering springs be sure to give pressure setting desired CORPORATION VIKING PUMP INC e A Unit of IDEX Corporation e Cedar Falls IA 50613 USA SECTION TSM 163 PAGE ISSUE D 15 OF 15 SERIES 337 AND 4337 SIZES N AND R VIKING PUMP CORPORATION WARRANTY Viking warrants all products manufactured by it to be free from defects in workmanship or material for a period of one 1 year from date of startup provided that in no event shall this warranty extend more than eighteen 18 months from the date of shipment from Viking The warranty period for Universal Seal series 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 KIN
22. ing sleeve Carbon graphite bushings are standard for model 4337 pumps To replace carbon graphite bushings refer to INSTALLATION CARBON GRAPHITE BUSHINGS page 13 Clean all parts thoroughly and examine for wear and damage If lipseal replacement is needed press in the end cap with the lip facing the end of the shaft Check the idler bushing and idler pin replace if necessary If the idler pin is to be replaced the oil grove on the pin must be installed facing the center of the crescent on the head If the idler bushing is to be replaced a press must be used to move the old bushing and install new The bushing position after being pressed in should be flush with the face of the idler For carbon graphite idler bushing refer to INSTALLATION OF CARBON GRAPHITE BUSHINGS page 13 NOTE R size idler bushings are shrink fit Wash the bearing in clean solvent Blow out bearings with compressed air Do not allow bearings to spin turn the bearing slowly by hand Spinning the bearings will damage the race and rollers Make sure the bearings are clean then lubricate with non detergent SAE 30 weight oil and check for roughness Roughness can be determined by turning the outer race by hand CAUTION do not intermix the inner and outer races for the roller bearings Examine the casing for wear Check the condition of the casing at the seal area surface between suction and discharge ports If the surface is in good condition the casing ne
23. le is equivalent to 005 of end clearance Tighten inner end cap Check rotor to determine if it turns freely in the casing If not make further adjustment until rotor does turn in casing Standard catalog pumps require the following end clearance settings N 015 R 020 minimum Pumps built for viscous liquid or high temperature service may require extra end clearance Consult factory Lock both end caps securely in position with end cap locks and screws NOTE The R 4337 pump has a special idler arrangement which must have its end clearance adjusted prior to setting the rotor end clearance The Carbon Graphite idler bushing extends beyond the idler face on one side of the idler This side of the idler is placed toward the head which allows the Carbon Graphite bushing to contact the head and provide clearance between the stainless steel idler face and the head The Carbon Graphite bushing extension is 0 008 0 012 See Figure 1 The idler bushing has a high interference fit and must be installed by heat shrinking The idler must be heated to 600 F before installing the idler bushing The idler bushing is to extend beyond the idler face 0 008 0 012 0 012 0 008 BUSHING EXTENSION BEYOND IDLER FACE ROTOR HEAD THIS THIS SIDE SIDE FIGURE 17 IDLER AND BUSHING ASSEMBLY Install the idler amp bushing over the idler pin placing the side of the idler with the bushing extension against the head See
24. of the retainer cartridge are provided for securing rotating assembly to pump shaft The stationary seal seat Two seal seat gaskets Three pump parts necessary for mounting PTFE mechanical seal are illustrated in figure 14 item letters A B C and D 1 The packing box extension has a machine pilot on the end for installation in the rotor bearing sleeve and two tapped holes for the seal flush The packing box extension gasket The seal plate is machined to accept seal seat and gasket Be especially careful to keep mechanical seal parts clean Minute dirt particles especially on seal faces will cause leakage Never touch the seal faces with anything except clean hands or a clean cloth 1 Deburr the threads on the rotor shaft with a fine file and place a layer of tape over the threads to protect the rotor bearing sleeve bushing during assembly Gently radius leading edge of the largest diameter on the shaft 03 inch is sufficient to aid in seal installation Smooth radius with a very fine grit emery cloth Polish the rotor shaft from leading edge through mechanical seal area with the emery cloth Any scratches left on shaft in seal area will provide leakage paths under mechanical seal Install the rotor bearing sleeve and gasket on the casing Coat both sides of the gasket with thread sealant pipe dope and quickly install the gasket and rotor bearing on the casing Place a support under the rotor bearing sleeve to prev
25. or bearing sleeve bore with end of seal located 0 19 inch inside the machined face of the rotor bearing sleeve Refer to Figure 14 page 10 Tighten all seal drive set screws securely to the shaft Remove the tapered installation sleeve Place the gasket on the packing box extension and install the extension with machined pilot inside the rotor bearing sleeve bore Place the seat gasket over the shoulder of the stationary seal seat and insert seat into the seal plate Place the remaining seat gasket over shoulder of polished surface of stationary seat Refer to Figure 14 page 10 Place the seal plate with the stationary seat over the mounting studs and push the shoulder of stationary seat into the packing box extension the polished face against the carbon rotating face Install the nuts on mounting studs and against seal holder Tighten the nuts evenly so the seal plate and stationary seat will not be distorted when seal is compressed SECTION TSM 163 ISSUE D PAGE 11 OF 15 19 20 21 22 23 24 25 26 27 28 SECTION TSM 163 Place inner end cap with lipseal lip facing end of shaft on shaft Install thrust bearing housing on end of rotor bearing sleeve and tighten nuts and capscrews securely Insert both tapered roller bearings in thrust bearing housing large end of inner races together CAUTION It is possible to install bearings incorrectly For proper assembly refer to figure 16 below
26. per reassembly The idler pin which is offset in the pump head must be positioned toward and equal distance between the port connections to allow for proper flow of liquid through the pump It is not necessary to remove the relief valve to take the head off the pump however removing the relief valve will lessen total weight of the part Do not use a chain or cable around relief valve body to support head during removal For PRESSURE RELIEF VALVE INSTRUCTIONS refer to page 14 Remove the nuts from the head Jackscrews should be used to back the head away from the casing Refer to figure 11 The proper size and length of jackscrews for the pump size are shown in figure 12 The use of a hoist to support head will facilitate its removal Back the head away from the casing Remove head from the pump Do not allow the idler to fall from the idler pin To prevent this tilt the top of head back when removing Remove the head gasket idler and bushing assembly To remove the rotor remove seal plate nuts from studs and remove seal plate gaskets and stationary seat Remove Packing box extension and gasket Loosen set screws in mechanical seal retainer cartridge and remove from rotor shaft Refer to Figure 14 page 10 Remove the casing drain plug to break the vacuum between back of the rotor and the casing Remove any deposit of material from the exposed portion of the shaft between the seal plate and the thrust bearing assembly JACK
27. uii m I 8 8 s 2 2 4 0943 s sos SECTIONAL VIEW MODELS N AND R4337 FIGURE 10 z Gasket for Packing Box Extension a iraro ae ou aero Sane ar perraro Soe ae peerage Get ais ma as are omar ae co co co Li Packing Box Extension Mechanical Seal Complete 7 Rotor Bearing Sleeve Bushing Rotor Bearing Sleeve Casing Rotor and Shaft C il Head Nut for Head Stud for Head Capscrew for Valve Internal Relief Valve Complete SECTION TSM 163 ISSUE D PAGE 8 OF 15 DISASSEMBLY DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir relief valve adjusting cap fitting 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 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 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 Mark the head and casing before disassembly to ensure pro
28. x inner and outer races for the roller bearings Replace the bearings if they have roughness Examine the casing for wear Check the condition of casing at seal area surface between suction and discharge port If the surface is in good condition the casing need not be replaced When making major repairs such as replacement of a rotor it is usually considered advisable to install a new head and idler When making minor repairs where only an idler bushing and idler pin are required other new parts are usually not necessary ISSUE D PAGE 6 OF 15 ASSEMBLY 1 Install the rotor bearing sleeve and gasket on the casing Coat both sides of the gasket with thread sealant pipe dope and quickly install the gasket and rotor bearing sleeve on the casing Place a support under rotor bearing sleeve to prevent casing and rotor bearing sleeve from tilting down while the rotor is being installed Check the casing to be sure the drain plug has been removed Carefully check the shaft remove any burrs or rough surfaces to avoid damaging the rotor bearing sleeve bushing while installing the rotor and shaft into the casing Coat the inner diameter of the rotor bearing sleeve bushing and shaft with a thin coat of non detergent SAE 30 weight oil Support the weight of the rotor with a hoist A cable sling can be used around the shaft or around rotor teeth to carry weight of the part while being assembled into the casing Place end of the
29. y Pumps Refer to Figures 1 through 20 for general configuration and nomenclature used in this manual Pump specifications and recommendations are listed in Catalog Section 163 Series 337 and 4337 Heavy Duty Steel External Pumps CORPORATION SECTION TSM 163 PAGE 1 OF 15 SERIES 337 AND 4337 ISSUE D SIZES N AND R FIGURE 1 R337 SIZE SHOWN SPECIAL INFORMATION DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir relief valve adjusting cap fitting etc Be sure 1 That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings orconnections 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 That you know what 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 liquid the Failure to follow above listed precautionary measures may result in serious injury or death VIKING PUMP INC e A Unit of IDEX Corporation e Cedar Falls IA 50613 USA SPECIAL INFORMATION ROTATION Viking pumps operate equally well in a clockwise or counterclockwise rotation Shaft rotation determines which port is suction and which is discharge The suction port location is where pump
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