TECHNICAL SERVICE MANUAL
Contents
1. blocking can be used to support head This will eliminate having to lift the head into position when reassembling the pump Remove the head gasket idler and bushing assembly Remove the pipe plug from the drain hole in the casing this breaks the vacuum behind rotor 10 11 JACKSCREWS FIGURE 5 Z THREAD SIZE HI ADAC ai MIN La SIZE PERA NCH SIZE USED INCH N 2 400 0 50 13 NC R o ET 0 63 11 NC O P 3 500 0 50 13 NC FIGURE 6 MINIMUM JACKSCREW LENGTH Remove the packing gland nuts and slide the gland out of the rotor bearing sleeve Insert a 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 the locknut and lockwasher from the shaft Refer to Figure 7 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 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 the weight of the part Remove 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 the2. extension and install the extension with the machined pilot inside the rotor bearing sleeve bore 7 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 18 8 Place the seal plate with the stationary seat over the mounting the studs and push the shoulder of stationary seat into the packing box extension the polished face against the carbon rotating face 9 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 10 Reassemble flush line to packing box extension AT THIS POINT FINISH ASSEMBLY PROCEDURES STARTING AT STEP 18 page 10 THRUST BEARING ADJUSTMENT Loosen the capscrews retaining the end cap locks on both the inner and outer end caps Slide the end cap locks out far enough so the pins are no longer in the end cap retaining holes Using the spanner wrench provided with the pump turn the inner end cap towards the pump Turn the outer end cap in until the rotor shaft cannot be turned With grease pencil or chalk make a reference mark on the bearing housing OD and outer end cap Back off the outer end cap approximately 4 holes One hole is equivalent to 005 inch end clearance Align the nearest end cap hole with the outer end cap lock Tighten the setscrew ho
3. 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 the above listed precaution ary 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 the pump head must be positioned towards and equal distance between the port connections to allow for proper flow of liquid through the pump Refer to figure 5 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 the relief value body to support head during removal For PRESSURE RELIEF INSTRUCTIONS refer to page 13 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 the head will facilitate its removal Back the head away from casing Do not allow the idler to fall from the idler pin To prevent this tilt the top of head back when removing Remove head from the pump Ifa hoist is not available cribbing or blocking can be used to support the head This will eliminate having to lift the head into position when reassembling the pump Remove the
4. head gasket idler and bushing assembly To remove the rotor loosen the set collar behind the mechanical seal Through the one inch jacket connection JACKSCREWS FIGURE 11 THREADSIZE SIZE ee A NINH SIZE USED INCH O N 2 400 0 50 13 NC OR 2 4 50 063 11NC_ P 3 500 050 13NC FIGURE 12 MINIMUM JACKSCREW LENGTH on top of the rotor bearing sleeve remove the 0 25 socket head pipe plug Through the same hole loosen the 0 313 socket head setscrews which locks the collar to the shaft Rotate shaft to be sure all setscrews have been loosened Refer to figure 10 page 8 items 16 and 17 for the pipe plug to remove and the setscrews to be loosened Remove the casing drain plug to break the vacuum between back of the rotor and the casing Remove any deposits of material from the exposed portion of the shaft between the seal plate and the thrust bearing assembly 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 Ny Ja ADJUSTING NUT LOCK LOCKWASHER WITH TANG FIGURE 13 LOCKNUT 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 be
5. of the lockwasher into a slot of locknut l l If tang does not line up with a slot tighten locknut until 9 Pack the pump with new packing Refer to Figure 8 f e steal Ue A NON ue maul or engage me l i ockwasher tang could result in early bearing failure and Models N and R335 have 6 rings of packing Model cause damage to rest of the pump P335 has 8 rings of packing and a lantern ring The l lantern ring should be installed after the fourth ring of 16 Remove the length of hardwood or brass bar from the packing has been assembled into the packing box port opening 10 Install the thrust bearing housing on the end of rotor 17 Install the nuts on the packing gland studs and tighten Do not over tighten as it may cause binding on rotor shaft Reinstall the circulation 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 ADJUSTMENT page 13 DANGER Before starting the pump be sure all drive N335 4 63 4 69 3 44 equipment guards are in place FIGURE 8 STUFFING BOX DIMENSIONS Failure to properly mount the guards may re sult in serious injury or death 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 FIGURE 9 12 Install the bearing spacer collar on the shaft next
6. ALVE ADJUSTING SCREW CAP 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 10 11 12 13 14 15 16 18 19 20 Before installing the parts contained in the mechanical seal refer to Figure 14 to become familiar with part name and location in rotor bearing sleeve Install the set collar on the shaft in the rotor bearing sleeve directly under the tapped access hole The center line of the collar set screws 5 16 socket head must line up with the center line of the access hole Rotate the shaft and tighten all setscrews Replace the pipe plug in seal access hole Slide the seal spring on the shaft and into the seal chamber against the set collar Place the spring adapter with the open side facing the end of shaft against the spring Place the tapered installation sleeve on shaft NOTE The tapered installation sleeve is available from factory at additional cost for the N amp R size pumps Apply a generous amount of non detergent SAE 30 weight oil to the large diameter of the shaft tapered installation sleeve and the inner diameter of the mechanical seal rubber parts Coat the seal holder chamber and the o ring seat gasket with non detergent SAE 30 weight oil and press in the seal seat with lapped faced out Protect the face of the seal seat with a clean piece o
7. Electronic copies of the most current TSM issue can be found on the Viking Pump website at www vikingpump com TECHNICAL SERVICE MANUAL HEAVY DUTY PUMPS PAGE 1 OF 15 SERIES 335 AND 4335 ISSUE E SIZES N R AND P SECTION TSM 143 CONTENTS Introduction 1 Special Information 2 Maintenance 2 Packed Pumps 4 Mechanical Seal Pumps 8 Optional PTFE Seal 12 Thrust Bearing Adjustment 13 Installation of Carbon Graphite Bushings 13 Pressure Relief Valve Instructions 14 FIGURE 1 Warranty 15 INTRODUCTION DANGER The illustrations used in this manual are for identification purposes only and cannot be used for ordering parts Obtain Before opening any Viking pump liquid cham a parts list from the factory or a Viking representative ber pumping chamber reservoir relief valve Always give the complete name of the part part number adi stina can fitin etc be Sure and material with the model number and serial number of J g cap g l l the pump when ordering repair parts The unmounted pump or pump unit model number and serial number are on the 1 That any pressure in chamber has been nameplate completely vented through the suction or discharge lines or other appropriate In the Viking model number system basic size letters are openings or connections combined with the series number 335 and 4335 indicating both unmounted or mounted pump unit 2 That the driving means motor turbine engine etc has been locked out or ma
8. 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 ISSUE E PAGE 10 OF 15 E j ISI eE T e s a EE SILES 1000 BABA LIST OF PARTS O Ring Seat Gasket 8 Set Collar with set screws 9 Rotor Bearing Sleeve 10 Rotor Bearing Sleeve Bushing 11 Seal Holder Plate 12 O Ring Gasket for seal holder plate 13 Pipe Plug 7 Spring 14 Shaft NOTE Items one through seven comprise the complete mechanical seal FIGURE 14 MECHANICAL SEAL Stationary Seat Rotating Face Washer Bellows Metal Parts retainer drive band 6 Spring Adapter to be replaced Replacing individual seal parts is not recommended e a used seal washer will not perform satisfactorily when run against a new stationary seat ASSEMBLY Standard Mechanical Seal Synthetic Rubber Bellows 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 Be especially careful to keep mechanical seal parts clean Minute dirt particles especially on the seal faces will cause leakage Never touch the seal faces with anything except clean hands or a clean cloth Once the rotating portion of mechanical seal is installed on rotor shaft it is necessary to assemble parts as quickly as possible to ensure the seal does n
9. and idler assembly CAUTION do not drop the idler on the foot The pump head and casing were marked before disassembly to ensure proper reassembly If not be sure the 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 Rotate the idler on idler pin until the idler teeth mesh with the rotor teeth Raise the 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 to the head to casing with nuts and tighten evenly If the relief valve was not removed from head install on head with adjusting screw cap pointed toward the suction port Refer to Figure 2 page 2 For PRESSURE RELIEF INSTRUCTIONS refer to page 14 bearing sleeve and tighten the nuts and capscrews securely It is not necessary to use a gasket between these parts 14 15 18 19 20 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 the tang in the keyway on 7 Push the rotor back against the head the shaft Tighten the locknut to 170 190 ft lbs torque 6 instalctnedrain pluganithe casing Bend one tang
10. arefully and do not over tighten the packing gland After the initial adjustment inspection will reveal the need for packing gland adjustment or packing replacement Refer to instructions under DISASSEMBLY page 4 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 If the pump is to be stored or not used for six months or more the 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 335 and 4335 pumps These tools are in addition to standard mechanics tools such as open end wrenches pliers screwdrivers etc Most of the listed items can be obtained from an industrial supply house 1 Soft Headed Hammer 2 Allen Wrenches for 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 6 Brass Bar 7 Ar
11. aring 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 Loosen the end cap lockscrews disengage the end cap SECTION TSM 143 ISSUE E PAGE 9 OF 15 10 11 12 13 14 15 16 SECTION TSM 143 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 the thrust bearing housing Remove the nuts holding the seal plate and remove seal plate The stationary seal seat can be removed from the seal plate and the rotating portion of the seal from the rotor bearing sleeve remove the spring and set collar from the bottom of the seal chamber Check rotor the bearing sleeve bushing while the rotor bearing sleeve is mounted on the casing If worn the bushing must be replaced Disconnect the flush line and remove the rotor bearing sleeve from the casing 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 bearing sleeve Carbon graphite bushings are standard for Model 4335 pumps To replace carbon graphite bushings refer to INSTALLATION CARBON GRAPHITE BUSHINGS page 12 Clean all parts thoroughly and examine for wear and damage If lipseal replacement is needed press in the end cap wi
12. bor Press PACKING ROTOR BEARING ROLLER SLEEVE GASKET CASING HEAD GASKET GLAND BEARINGS ROTOR BEARING HEAD SLEEVE BUSHING SHAFT IDLER PIN E RELIEF END CAP T a VALVE THRUST BEARING HOUSING J ROTOR BEARING HOUSING BEARING SLEEVE STAND PACKING ROTOR RELIEF VALVE ADJUSTING IDLER SCREW CAP IDLER BUSHING FIGURE 3 CUTAWAY OF PACKED PUMP MODEL N335 SECTION TSM 143 ISSUE E PAGE 3 OF 15 PACKED PUMPS Model N R and P335 IVA iin Fi FIGURE 4 DETAILS FOR SECTIONAL VIEW MODELS N R AND P335 ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART Locknut 11 Packing Gland Nut For Head Bearing Housing Nut 2 Lockwasher 12 aoe Ang ds 22 Stud For Head 32 Bearing Housing Capscrew amp Bushing Bearing Spacer Collar 13 Capscrew For Valve ani Rotor Bearing aoe One young ig usnng Soler 24 Idler Pin Nut Not N 34 Nut For Rotor Bearing Sleeve Locknut Bearing Sleeve re otros T NC T 2 Juresoaiero 50 remotas N SECTION TSM 143 ISSUE E PAGE 4 OF 15 DANGER Before opening any Viking pump liquid cham ber 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 2 That the driving means motor turbine engine etc has been locked out or made non ope
13. de MODEL NUMBER CHART non operational so that it cannot be started while work is being done on the pump UNMOUNTED PUMP MECH PACKED SEAL Units are designated by the un 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 mounted pump model numbers N335 N4335 followed by a letter indicating drive R335 R4335 Style P335 PA335 P Commerical Speed Reducers This manual deals only with Series 335 and 4335 Heavy Duty Pumps Refer to Figures 1 through 20 for general Failure to follow the above listed precaution configuration and nomenclature used in this manual Pump ary measures may result in serious injury or specifications and recommendations are listed in Catalog death Section 143 for series 335 and 4335 Heavy Duty Pumps CORPORATION 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 pumping elements gear teeth come out of mesh CIRCULATION LINES are standard equipment N amp R size only and must be properly connected Packed pumps have a line connected from the packing chamber to the discharge port Mecha
14. ds suction side of pump If pump rotation is reversed remove the pressure relief valve and turn end for end Refer to Figure 2 5 Pressure relief valves cannot be used to control the pump flow or regulate the discharge pressure For additional information on pressure relief valves refer to Technical Service Manual TSMO0O and Engineering Service Bulletin ESB 31 INLET p OUTLET SUCTION i DISCHARGE RELIEF VALVE ADJUSTING SCREW CAP FIGURE 2 SECTION TSM 143 ISSUE E PAGE 2 OF 15 SPECIAL MECHANICAL SEALS can be installed in a modified stuffing box Extra care must be taken in the repair of pumps with mechanical seals Read and follow all special information supplied with the pump MAINTENANCE The Series 335 and 4335 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 Bulleting ESB 515 Consult factory with specific lubrication questions PACKING ADJUSTMENT New packed pumps require an initial packing adjustment to control leakage as the packing runs in Make initial adjustments c
15. ets Seal Mounting Parts Packing box extension Packing box extension gasket Seal plate Flush openings DISASSEMBLY 1 Disassemble the pump per steps 1 thru 10 on page 8 under MECHANICAL SEAL DISASSEMBLY Remove the seal plate nuts from the studs and remove the seal plate gaskets and stationary seat If the pump is equipped with a flush line disconnect from the packing box extension Remove the packing box extension and gasket Loosen the set screws in the mechanical seal retainer cartridge and remove from the rotor shaft Refer to Figure 18 ASSEMBLY 1 Reassemble the pump per steps 1 thru 9 on pages 10 amp 11 under ASSEMBLY STANDARD MECHANICAL SEAL Step 1 deburring shaft is very critical prior to the seal assembly NOTE The tapered installation sleeve is available from factory at additional cost for the N amp R size pumps from Viking Pump Division Coat the large diameter of shaft tapered sleeve and inside diameter of seal with non detergent SAE 30 weight oil 3 Place the tapered installation sleeve if on hand and install the seal on the shaft over tthe apered sleeve Position the seal on the shaft inside the rotor bearing sleeve bore with end of seal located 19 inch inside the machined face of the rotor bearing sleeve Refer to Figure 18 4 Tighten all the seal drive set screws securely to the shaft 5 Remove the tapered installation sleeve 6 Place the gasket on the packing box
16. f cardboard while pressing into place Coat the seal holder plate o ring gasket with non detergent SAE 30 weight oil and install over the pilot of plate Coat the inside diameter of the rotating face of seal with non detergent SAE 30 weight oil and start the tail of bellows over installation sleeve on shaft A twisting motion while pushing will aid in sliding the seal on the sleeve Push the seal against seal adapter Do not touch the carbon rotating face with anything except clean hands or a clean cloth Check to make sure the adapter is not cocked Install the seal holder plate over the shaft on mounting studs until the seal faces touch Start the nuts on the mounting studs Pull the seal holder plate evenly against the face of the seal chamber with the nuts alternately tightening one and then the other This will compress the mechanical seal to correct operating length and compress the plate gasket to seal off the seal chamber Remove the tapered installation sleeve Place the inner end cap with lipseal lip facing end of shaft on shaft Install the thrust bearing housing on end of the rotor bearing sleeve and tighten the nuts and capscrews securely It is not necessary to use a gasket between these parts Insert both tapered roller bearings in the thrust bearing housing large end of the inner races together CAUTION It is possible to install bearings incorrectly For proper assembly refer to Figure 17 Instal
17. l the bearing spacer collar on the shaft next to the inner race of the roller bearing SECTION TSM 143 ISSUE E PAGE 11 OF 15 FIGURE 17 DANGER Before starting the pump be sure all drive equipment guards are in place Failure to properly mount guards may result in serious injury or death OPTIONAL MECHANICAL SEAL PTFE Fitted Type Three components are furnished in the mechanical seal assembly Refer to Fgure 18 item numbers 1 thru 6 1 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 of the retainer cartridge are provided for securing rotating assembly to pump shaft 2 The stationary seal seat 3 Two seal seat gaskets Three pump parts necessary for mounting PTFE mechanical seal are illustrated in Figure 18 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 2 The packing box extension gasket 3 The seal plate is mthe achined to accept seal seat and gasket SECTION TSM 143 ISSUE E PAGE 12 OF 15 1 a a hes a F k Fa kT hr F AS i F z Pa M2 03K 4005 06 a a a FIGURE 18 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 Gask
18. lding this lock Tighten the inner end cap until itis snug Do not over tighten Back off slightly to align the nearest end cap hole with the end cap lock Tighten this setscrew It is important not to tighten the inner end cap to make the end cap lock align This will cause the tapered roller bearings to run too tightly and heat up Turn the rotor shaft to make sure it turns freely If not repeat the above procedure Standard catalog pumps require the following end clearance settings Pump Size Standard End Clearance Inch NG 015 020 O P 085 Pumps built for viscous liquid or high temperature service may require extra end clearance Each hole on the end cap is about 004 inch additional end clearance Consult an authorized Viking distributor or the factory for further information 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 A press 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 bu
19. n The relief valve adjusting screw cap must Bonnet Bonnet Gasket always point towards suction side of the pump If the pump rotation is reserved remove the relief valve and turn end for FIGURE 19 end Refer to Figure 20 DISASSEMBLY DANGER Before starting the pump be sure all drive equipment guards are in place DANGER Failure to properly mount guards may result in serious injury or death Before opening any Viking pump liquid cham ber pumping chamber reservoir relief valve adjusting cap fitting etc Be sure e OUTLET OR DISCHARGE 1 That any pressure in the chamber has been OR O completely vented through the suction SUCTION iii or discharge lines or other appropriate openings or connections 2 That the driving means motor turbine F engine etc Has been locked out or made RELIEF VALVE non operational so that it cannot be started ArenA a i hile work is being done on pump Nan i l FIGURE 20 3 That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid PRESSURE ADJUSTMENT Obtain a material safety data sheet MSDS for the liquid to be sure these precautions are understood factory has set the following instructions must be carefully followed If a new spring is installed or if the pressure setting of the pressure relief valve is to be changed from that which the Failure to follow the above listed precaution ary measure
20. nical seal pumps have a line connected from the seal chamber to the suction port If the pump rotation is reversed be sure the circulation lines are connected 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 circulation line is insulated to assure continued flow The jacketed head R amp P 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 the pump These features do not alter basic steps in the disassembly and assembly of your pump PRESSURE RELIEF VALVES 1 Viking pumps are positive placement 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 Anon jacketed relief valve is standard on these pumps Options include plain and jacketed relief valves N size pumps with a jacketed head with a relief valve is not available R size pumps are standard with a jacketed head but also have both plain and jacketed relief valve available as options P size pumps are standard with a jacketed head and non jacketed relief valve 3 If the pump rotation is to be reversed during operation pressure protection must be provided on both sides of pump 4 The relief valve adjusting screw cap must always point towar
21. ot stick to the shaft in the wrong axial position The seal should be expected to stick to the shaft after several minutes setting time 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 the 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 2 Install the rotor bearing sleeve and gasket on the casing Coat both sides of the gasket with thread sealant pipe 7 9 dope and quickly install the gasket and rotor bearing on the casing Place a support under the rotor bearing sleeve to prevent 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 SAE 30 weight oil Support the weight of the rotor with a hoist A cable sling can be used around the shaft or around the rotor teeth to carry the 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
22. packing from the rotor bearing sleeve NOTE Model P335 has a lantern ring Check the rotor bearing sleeve bushing while the rotor bearing sleeve is mounted on the casing If worn the bushing must be replaced Disconnect the circulation line and remove the rotor bearing sleeve from casing 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 through SECTION TSM 143 ISSUE E PAGE 5 OF 15 12 SECTION TSM 143 the packing end of the rotor bearing sleeve If the bushing is carbon graphite refer to INSTALLATION OF CARBON GRAPHITE BUSHINGS page 13 ADJUSTING NUT LOCK WITH SELF LOCKING PIN aay Tim ES i or f Tf a LOCKWASHER WITH TANG LOCKNUT FIGURE 7 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 the center of the crescent on the head If lipseals need replacement press into the end cap with the lip facing the bearings 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 Wash the anti friction bearings roller bearings in clean
23. prings be sure to give the pressure settings desired 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 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 3 2013 Viking Pump Inc All rights reserved CORPORATION VIKING PUMP INC e A Unit of IDEX Corporation e Cedar Falls IA 50613 USA
24. rational so that it cannot be started while work is being done on the 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 precaution ary measures may result in serious injury or death DISASSEMBLY 1 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 the pump Refer to figure 5 It is not necessary to remove the relief valve to take the head off the pump however removing the relief valve will lessen the total weight of the part Do not use chain or cable around the relief value body to support the head during removal For PRESSURE RELIEF VALVE INSTRUCTIONS refer to page 14 Remove all nuts from the head Jackscrews should be used to back the head away from the casing as shown in Figure 5 For proper size and length of jackscrews for pump size refer to the table in Figure 6 The use of a hoist to support head will facilitate its removal Back the head away from casing Do not allow the idler to fall from the idler pin To prevent this tilt the top of the head back when removing Remove the head from pump If a hoist is not available cribbing or
25. s may result in serious injury or death 1 Carefully remove the valve cap which covers the adjusting screw Loosen the locknut which locks the adjusting screw so the pressure setting will not change during operation of pump SECTION TSM 143 ISSUE E PAGE 14 OF 15 TECHNICAL SERVICE MANUAL HEAVY DUTY PUMPS PAGE 150F 15 SERIES 335 AND 4335 SSUE E SIZES N R AND P SECTION TSM 143 2 Install a pressure gauge in the discharge line for the VIKING actual adjustment operation PUMP IREX 3 Turn the adjusting screw in to increase pressure and out to decrease pressure WARRANTY 4 With the discharge line closed at a point beyond pressure Viking warrants all products manufactured by it to be gauge the gauge will show maximum pressure valve will free from defects in workmanship or material for a allow while pump is in operation 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 IMPORTANT Viking The warranty period for Universal Seal series When ordering parts for the pressure relief valve always give PUMPS NE ee BeA TOES SE DANS three 3 years from date of startup provided that in the model number and serial number of pump as it appears no event shall this warranty extend more than forty two on the nameplate and name of part wanted When ordering 42 months from the date of shipment from Viking s
26. shing 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 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 143 ISSUE E PAGE 13 OF 15 PRESSURE RELIEF VALVE INSTRUCTIONS ye Mark valve and head before disassembly to ensure proper 56 D reassembly Remove the valve cap 2 Measure and record the length of extension of adjusting screw Refer to A on Figure 19 i Ca a al E 3 Loosen the locknut and back out the adjusting screw i 1 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 j and damage and replace as necessary ASSEMBLY Valve Cap Valve Body Adjusting Screw Valve Spring Reverse the procedures outlined under DISASSEMBLY If Lock Nut Poppet the valve is removed for repairs be sure to replace in the Spring Guide Cap Gasket same positio
27. solvent Blow out the bearings with compressed air Do not allow the 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 Replace the bearings if they have roughness Examine the casing for wear Check the condition of the casing at the sealing 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 E PAGE 6 OF 15 ASSEMBLY 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 the rotor bearing sleeve to prevent 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 Carefully check the shaft remove any burrs or rough surfaces to avoid damaging the rotor bearing slee
28. 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 Place the head on pump slightly tilting top of 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 13 INLET TA CS q OUTLET OR F o Thy i OR SUCTION PS ees DISCHARGE Pd RELIEF V
29. th 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 groove 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 remove the old bushing and install new The bushing position after being pressed in should be flush with teh face of the idler For carbon graphite idler bushing refer to INSTALLATION OF CARBON GRAPHITE BUSHINGS page 12 Wash the bearing in clean solvent Blow out bearings with compressed air Do not allow the 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 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 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
30. to the inner race of the roller bearing 13 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 SECTION TSM 143 ISSUE E PAGE 7 OF 15 MECHANICAL SEAL PUMPS Model N R AND P4335 2 O 6 Be 12 de 17 16 4921 20 35 22 2324 36252622 37 28 2935 60 y H a I i NE ry a up i ay a ee a af f J 62 33 34 35 FIGURE 10 DETAILS FOR SECTIONAL VIEW MODELS N R AND P4335 ITEM NAME NAME OF PART PART ITEM NAME NAMEOFPART PART GO a aaa ES Lip Seal E Coar AN SE Nut For Head Head Gasket Screws i 1 End Cap Kiri SON Stud For Head Relief Valve Gasket Roller Bearing 18 Rotor Bearing Sleeve 56 canscrew For Valve Flush line Not Illus amp Bushing Grease Fitting 19 Bushing Rotor Bearing 29 igler Pin Nut Not N Sleeve SECTION TSM 143 ISSUE E PAGE 8 OF 15 DISASSEMBLY 2 3 DANGER Before opening any Viking pump liquid cham ber 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 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 the pump 3 That you know what liquid the pump
31. ve 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 rotor teeth to carry the weight of the part while being assembled into the casing Place the end of the rotor shaft through the casing into the bushing slowly turn rotor from right to left while pushing into the 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 as far into the casing 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 Place the idler assembly on the idler pin and prepare to mount the head
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