TECHNICAL SERVICE MANUAL
Contents
1. 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 164 A or death BEFORE opening any liquid chamber pumping chamber reservoir relief valve adjusting cap fitting 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 pumping chamber or its connection ports or into any part of the2. drive train if there is any possibility of the pump shafts being rotated DO NOT exceed the pumps 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 All piping connected to the pump is fully supported and correctly aligned with the pump Pump rotation is correct for the desired direction of flow ISSUE F PAGE 2 OF 10 Danger Failure to follow the indicated instruction may result in serious injury 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 DO N
3. towards suction side of the pump If the pump rotation is reversed remove the relief valve and turn end for end Refer to Figure 3 page 3 SECTION TSM 164 ISSUE F PAGE 9 OF 10 TECHNICAL SERVICE MANUAL HEAVY DUTY STAINLESS STEEL PUMPS SERIES 4197 SIZES GG HJ HL AS AK AL SECTION TSM 164 PAGE 10 OF 10 ISSUE F VIKING PUMP DANGER Before starting pump be sure all drive equipment guards are in place 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 Failure to properly mount guards may result in serious injury or death 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 Install a pressure gauge in the discharge line for actual adjustment operation Carefully remo
4. 3 the plane formed by the end of the retainer should be perpendicular to the shaft as closely as possible MECHANICAL SEAL Clean off the assembly just installed Insert the spring and ROTARY MEMBER disc Lubricate the two piece PTFE wedge inside and outside with SAE 30 oil Place the tapered sleeve furnished with FIGURE 10 the replacement seals on the shaft against the largest shaft diameter and coat it with SAE 30 oil Push the PTFE wedge assembly over the tapered sleeve and using the carbon SEAL SEAT BORE washer push the wedge onto the retainer against the disc Align the retainer with carbon washer indents compress and secure with retainer ring When the carbon face is compressed against spring some drag should be felt but the spring must be able to push the wedge and carbon face out against the retainer ring roe Q Os 0 260055 a lt gt 2 gt RS MECHANICAL SEAL FOR GG4197 Retainer Cartridge Springs Wedge Rotating Face Washer Stationary Seat Seat Ring Gasket Disc Retaining Ring Anti Rotation Pin _ MECHANICAL SEAL FOR MODELS HJ HL AS AK AL4197 1 Retainer Cartridge Springs Wedge Rotating Face Washer Stationary Seat Seat Ring Gasket Anti Rotation Pin Drive Set Screws 2 3 4 5 6 7 8 9 FIGURE 11 RETAINER CARTRIDGE GROOVE FOR RETAINING RING See errr a SN Oar ON FIGURE 9 Remove the installation sleeve All m
5. E AND NON INFRINGEMENT ALL OF WHICH OTHER WARRANTIES ARE EXPRESSLY EXCLUDED See complete warranty at www vikingpump com CORPORATION VIKING PUMP INC e A Unit of IDEX Corporation Cedar Falls IA 50613 USA All rights reserved 3 2013 Viking Pump Inc
6. 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 STAINLESS STEEL PUMPS SIZES GG HJ HL AS AK AL CONTENTS Introduction 2 222044 1 Special Information 04 1 Safety Information 04 2 Special Mechanical Seals 3 Maintenance 0 200000 0s 3 Disassembly i ore cucc eraitteko ee 3 ASSemMBIy a 3 pee ad a ee ee we ia 6 Thrust Bearing Adjustment 8 Installation of Carbon Graphite Bushings 8 Pressure Relief Valve Instructions 9 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 series 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 4197 and are used to indicate either an unmounted pump or mounted pump unit MODEL NUMBER CHART UNMOUNTED PUMP UNITS GG4197 HJ4197 HL4197 AS4197 AK4197 AL4197 Units are designated by the unmounted pump model numbers followed by a letter s indicating drive style D Direct Drive FIGURE 1 GG HJ
7. OT attempt to dismantle a pressure relief valve that has not had the spring pressure relieved or is mounted on a pump that is operating AVOID contact with hot 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 a relief valve mounted directly on the pump 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 Relief valve adjusting screw caps must always point towards suction side of the pump If pump rotation is reversed position of the relief valve must be changed Pressure relief valves cannot be used to control pump flow or regulate discharge pressure For additional information refer to Viking Pump s Technical Service Manual TSM 000 and Engineering Service Bulletin ESB 31 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 ROTATION Viking pumps operate equally well in a clockwise or counterclockwise rotation Shaft rotation determines which port is suction and which is discharge Suction port is where p
8. Turn the locknut counterclockwise and remove the locknut from the shaft See Figure 9 or 10 page 7 7 Loosen the two setscrews in the face of the bearing housing and turn the thrust bearing assembly counterclockwise and remove from casing See Figure 9 or 10 page 7 8 GG HJ HL Remove the snap ring from the shaft See Figure 9 page 7 AS AK AL Remove the bearing spacer from the shaft See Figure 10 page 7 9 Remove the brass bar or piece of hardwood from the port opening 10 The rotor and shaft assembly can now be removed by tapping on the end of the shaft with a lead hammer or if using a regular hammer use a piece of hardwood between the shaft and hammer The spring and rotary member of the seal will come out with the rotor and shaft 11 GG HJ HL Remove the inner snap ring and single row ball bearing from the casing See Figure 9 page 7 AS AK AL Remove the bearing retainer washer See Figure 10 page 7 12 With a drift or screwdriver inserted in the shaft end of the casing tap the stationary seat from the casing See Figure 11 page 7 and Figure 13 page 8 CASING BALL BEARINGS CUTAWAY OF MODELS GG HJ OR HL4197 FIGURE 4 SECTION TSM 164 ISSUE F PAGE 4 OF 10 MECHANICAL SEAL 13 Disassemble the thrust bearing assembly GG HJ HL Remove the outer snap ring from the bearing housing and remove the ball bearing See Figure 9 page 7 AS AK AL Loosen the two setscrews in the flange o
9. ack the ball bearing with multi purpose grease NLGI 2 and install in the casing with the sealed end towards the head end of the pump Install the inner snap ring in GG HJ and HL size pumps See figure 7 page 6 NOTE AS AK and AL size pumps do not have a snap ring a bearing retainer washer must be assembled over the end of the shaft before the bearing is assembled See figure 8 page 6 7 Place the bearing spacer over the shaft and against the single row ball bearing in the casing AS AK and AL size pumps See figure 8 page 6 8 Install the shaft snap ring in the groove in the shaft GG HJ and HL size pumps See figure 7 page 6 9 For models using single seal bearings pack the lubrication chamber between the inner ball bearing and the double row ball bearing in the thrust bearing assembly approximately half full with multi purpose grease NLGI 2 See figures 7 and 8 page 6 10 Pack the double row ball bearing with multi purpose grease NLGI 2 and press into the bearing housing with shield side toward the coupling end of the shaft See figure 7 page 6 AS AK and AL size pumps do not use a shielded bearing Install the snap ring to hold the bearing in place on GG HJ and HL size pumps NOTE On AS AK and AL size pumps install the lip seal in the bearing housing end of the cap The lip should face towards the end of the shaft Put the bearing spacer sleeve in the lip seal and install in the bearing housing and t
10. and HL4197 SERIES Foot Type Unmounted Pump with Flanged Ports CORPORATION SECTION TSM 164 PAGE 1 OF 10 SERIES 4197 ISSUE F This manual deals only with Series 4197 Heavy Duty Pumps Refer to Figures 1 through 15 for general configuration and nomenclature used in this manual Pump specifications and recommendations are listed in Catalog Section 164 Series 4197 Heavy Duty Stainless Steel Pumps FIGURE 2 AS AK and AL4197 SERIES Foot Type Unmounted Pump with Flanged Ports 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 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 VIKING PUMP INC e A Unit of IDEX Corporation Cedar Falls IA 50613 USA SAFETY INFORMATION AND INSTRUCTIONS IMPROPER INSTALLATION OPERATION OR MAINTENANCE OF
11. ea will provide leakage paths under the mechanical seal ROTOR HEAD IDLER PIN RELIEF VALVE Abby FIGURE 5 EXPLODED VIEW FOR MODELS GG HJ AND HL 4197 oct efem Jsem O snap Ra Owe o Peera re Had ander Pn sey Ba Bearing Outen 10 Meerane sea 47 CapscrwstorHead Snap Ring for shat 11 Roro and Shak Asserbiy 18 Gastetior Reeves Bearna Houn 12 lserSusting ro roerne d E a 7 Ball Bearing Inner Head Gasket PO FIGURE 6 EXPLODED VIEW FOR MODELS AS AK AND AL 4197 7 8 Ball Bearing Inner Capscrews for Valve Rotor and Shaft Assembly Mechanical Seal EE o EE 10 3 4 p Seal for Bearing Housing 12 RelietValve Ea 13 6 14 Ea 15 16 18 E 20 Pipe Puos an 2 23 Ee SECTION TSM 164 ISSUE F PAGE 5 OF 10 INNER BALL BEARING INNER SNAP RING OUTER BALL BEARING OUTER SNAP RING iK SHAFT Hl pi SHAFT SNAP RING grama zt PE AL SSR BEARING HOUSING SETSCREW Laer Su FIGURE 7 THRUST BEARING ASSEMBLY GG HJ AND HL SIZES BALL BEARING BEARING RETAINER WASHER SETSCREW INNER BALL BEARING NYLON INSERT A ies Cas CO PhS SE A ee Ef BBB a AVA T LOCKNUT baie i rope BEARING HOUSING X X gt SETSCREWS La LLL FIGURE 8 THRUST BEARING ASSEMBLY AS AK AND AL SIZES ASSEMBLY PTFE Fitted Mechanical Seal 1 Installing New Seal See Fi
12. et Gasket 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 valve and head before disassembly to ensure proper reassembly 1 Remove the valve cap 2 Measure and record the length of extension of the adjusting screw Refer to A on Figures 14 and 15 3 Loosen the locknut and back out the adjusting screw until spring pressure is released 4 Remove the bonnet spring guide spring and poppet from the valve body Clean and inspect all parts for wear or damage and replace as necessary ASSEMBLY Reverse the procedures outlined under Disassembly above If the valve is removed for repair be sure to replace in the same position The relief valve adjusting screw cap must always point
13. 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 1 Refer to Figures 7 amp 8 page 6 for model to be disassembled and name of parts 2 Mark the head and casing before disassembly to ensure proper reassembly SECTION TSM 164 ISSUE F PAGE 3 OF 10 3 NOTE The four valve capscrews valve and gasket must be removed from the GG4197 model before the six head capscrews are removed Remove the head capscrews 4 Tilt the top of the head back when removing to prevent the idler from falling off the idler pin Avoid damaging the head gasket Remove the head from the pump 5 Remove the idler and bushing assembly If the idler bushing needs replacing see Installation of Carbon Graphite Bushings page 8 6 Insert a brass bar or piece of hardwood in the port opening and between the rotor teeth to keep the shaft from turning
14. gures 9 thru 13 GENERAL INFORMATION Mechanical seals for HJ HL AS AK and AL4197 size pumps are of the drive set screw type Mechanical seals for GG4197 size pump are friction driven and are pressed onto the rotor hub Installation sleeves are furnished with replacement seals for GG AS AK size pumps this is not necessary with HJ and HL pumps NOTE Cleanliness during installation is essential to seal performance Never allow the seal faces to contact a dirty surface ORDER OF ASSEMBLY Stationary seat and seat ring in casing Installation sleeve on the shaft where appropriate Seal rotating portion on the shaft Rotor and shaft into casing oe oS NS Head with gasket and idler onto the casing PREPARATION Remove burrs from threads and gently radius leading edges on rotor shaft Use 300 grit paper to radius the edges and to polish the shaft at the seal area Clean the rotor hub shaft SECTION TSM 164 ISSUE F PAGE 6 OF 10 and seal seat bore in casing making sure they are free from dirt and grit Place installation sleeve on shaft wide end against shaft shoulder See figure 10 page 7 STATIONARY SEAT ASSEMBLY Refer to Figures 9 and 11 page 7 All models Coat the outside diameter of the seat ring assembly and the inside diameter of the seal housing bore with SAE 30 oil Align the slot in the back of the seal seat with anti rotation pin in the bottom of the casing seat bore and start the seal seat into th
15. ice life 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 lf 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 the fittings and apply grease to the pump shaft extension Viking suggests rotating 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 4197 pumps These tools are in addition to standard mechanics tools such as open end wrenches pliers screw drivers etc Most of the items can be obtained from an industrial supply house 1 Soft Headed hammer 2 Allen wrenches set screws amp special mechanical seals 3 Snap Ring Pliers INTERNAL Viking P N 2 810 047 999 GG HJ HL 4197 EXTERNAL Viking P N 2 810 029 375 GG HJ HL 4197 4 Mechanical Seal Installation Sleeve 2 751 001 730 for 0 75 inch seal GG 4197 2 810 004 730 for 1 25 inch seal AS AL 4197 Bearing Locknut Spanner Wrench 2 810 043 375 Spanner Wrench adjustable pin type for use on bearing housing end cap 2 810 008 375 Brass bar Arbor press DISASSEMBLY DANGER Before opening any Viking pump liquid chamber pumping chamber reservoir relief valve adjusting cap
16. ighten the setscrews securely See figure 8 page 6 11 Insert a piece of brass or hard wood through the port opening between the rotor teeth to keep the shaft from turning 12 Start the thrust bearing assembly into the casing Turn by hand until tight This forces the rotor against the head Replace and tighten the locknut on the shaft 13 Remove brass piece or hardwood from port opening 14 Adjust the pump end clearance refer to Thrust Bearing Adjustment 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 SECTION TSM 164 ISSUE F PAGE 8 OF 10 FIGURE 13 THRUST BEARING ADJUSTMENT See Figures 7 and 8 page 6 Loosen the two screws in the face of the thrust bearing assembly If the shaft cannot be rotated freely turn the thrust bearing assembly counterclockwise until the shaft can be turned easily To set end clearance 1 While turning the rotor shaft rotate the thrust bearing assembly clockwise until a noticeable drag occurs This is zero end clearance 2 Mark the position of the bearing housing with respect to the casing 3 Rotate the thrust bearing assembly counterclockwise the distance listed below as measured on outside of bearing housing 4 After the adjustment is made tighten the two setscrews in the face of the bearing housing assembly to secure the position For viscositie
17. is bore Protect the lapped surface of the seal seat with a disc of clean cardboard and press the seal seat into this bore until it is firmly at the bottom of the bore A hammer handle or wood dowel will serve to press against the cardboard disc and seat ASSEMBLY OF SEAL ROTATING PORTION Models HJ HL AS AK and AL4197 refer to figure 12 page 7 Coat the inside diameter of the rotating portion assembly shaft and tapered sleeve with SAE 30 weight oil Be sure the shaft is free of any scratches nicks and burrs Check the internal parts PTFE rings and carbon washer of the rotating portion so that the parts concentrically align so they will not be pinched and twisted at installation With the shaft pointed upward push the rotating portion down along the large shaft onto the large diameter Remove the holding clips which hold the spring loaded disc away from PTFE and carbon parts See figure 10 page 7 Push the seal against the rotor hub and tighten the set screws to lock the seal to the shaft Remove the tapered sleeve MODEL GG4197 rotating portion of the mechanical seal for GG4197 size pump does not have set screws to drive itand must depend upon interference fit with the rotor hub See figure 12 page 7 The rotating portion must be disassembled before the retainer cartridge containing spring disc PTFE wedges and carbon face can be pressed upon rotor hub See figure 11 page 7 To disassemble the rotating portion of the sea
18. l compress the carbon face and rapidly depress the retaining ring through the notch at the end of the retainer cartridge as shown in figure 15 page 9 CAUTION Do not allow the compressed spring to be released suddenly which might send met al parts flying Protect your eyes Protect the carbon face and the PTFE parts from damage or contamination Disassemble the spring and disc by removing the hold ing clips around the outside Press the retainer cartridge onto the rotor hub See figure 12 page 7 At the factory an installation tube is used to press the retainer cartridge onto the rotor hub In lieu of a special tool a 6 1 2 length of one inch schedule 40 pipe or some blocks of wood and a light hammer can be used Lubricate the rotor hub with PTFE paste grease or SAE 30 oil and start retainer onto the leading edge of the rotor hub as evenly as possible Insert one inch pipe onto the retainer cartridge and press it COAT SHAFT AND TAPERED SLEEVE against the rotor hub or with a block of wood in each hand WITH LIGHT OIL BEFORE ASSEMBLY push on the outside edge on the side to force the retainer TAPERED SLEEVE down the hub It may be necessary to use a length of hard wood and a light hammer to completely set the retainer cartridge against the back of the rotor Check dimensionally from the end of the retainer to a machined portion on the back of the rotor at least two places 180 apart Runout should not exceed 0 00
19. odels Flush sealing faces of both the rotary member and the seal seat with light oil and install the rotor and shaft Push the rotor and shaft into the casing slowly until the ends of the rotor teeth are just below the face of the casing TUBULAR 7 INSTALLATION Toor INTERFERENCE FIT Zin ktts Place the gasket on the head and install the head and idler assembly on the pump The pump head and casing Were marked before disassembly to ensure proper GG4197 SEAL RETAINER CARTRIDGE ON ROTOR HUB reassembly If not be sure the idler pin which is offset in FIGURE 12 the pump head is positioned toward and equal distance between the port connections to allow for proper flow of liquid through the pump SECTION TSM 164 ISSUE F PAGE 7 OF 10 4 Tighten the head capscrews evenly 5 If the pump was equipped with a relief valve and was removed during disassembly install on the head with new gaskets Relief valve adjusting screw cap must always point towards the suction port Refer to figure 3 page 3 For relief valve repair or adjustments see Pressure Relief Valve Instructions page 9 In 2005 the use of single seal bearings were phased out Pumps now use Sealed for Life bearings that have seals on both sides The new bearings can be installed either side first and do not need to be packed with grease 6 Install the single row ball bearing in the casing For older models using single seal bearings p
20. s above 2500 SSU add additional end clearance 0 004 for GG HJ and HL size pumps and 0 005 for AS AK and AL size pumps DISTANCE IN INCHES ON O D OF BEARING HOUSING END CLEARANCE HJ HL 0 94 15 16 AS AK AL 1 25 1 1 4 INSTALLATION OF CARBON GRAPHITE BUSHINGS When installing the carbon graphite bushings extreme care must be taken to prevent breaking Carbon graphite is a brittle material and is 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 in installation The additional precautions listed below must be followed for proper installation A press must be used for installation Be certain the bushing is started straight Do not stop pressing the operation until the bushing is in the proper position as starting and stopping may result in a cracked bushing Check the bushing for cracks after installation PRESSURE RELIEF VALVE INSTRUCTIONS LIS fz aN ragged if eee ede fils FIGURE 14 VALVE GG HJ and HL SIZES Valve Cap Valve Body Adjusting Screw Spring Lock Nut Poppet Spring Guide Cap Gasket IEZ T A N Nf G Ga T NNP Y LAAN az fo ne aS aD ato P FIGURE 15 VALVE AS AK and AL SIZES VALVE LIST OF PARTS Valve Cap Valve Body Adjusting Screw Spring Lock Nut Poppet Spring Guide Cap Gasket Bonnet Bonn
21. umping elements gear teeth come out of mesh PRESSURE RELIEF VALVES 1 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 There are relief valve options available on these pumps Relief valve options include an internal relief valve and a return to tank relief valve 3 If pump rotation is reversed during operation pressure protection must be provided on both sides of the pump 4 The relief valve adjusting screw cap must always point towards the suction side of the pump If pump rotation is reversed remove the pressure relief valve and turn end for end Refer to Figure 3 below 5 Pressure relief valves should not be used to control flow or regulate discharge pressure For additional information on pressure relief valves refer to Technical Service Manual TSM 000 and Engineering Service Bulletin ESB 31 SPECIAL MECHANICAL SEALS Extra care should be taken in repair of these pumps Be sure to read and follow all special instructions supplied with your pump RELIEF VALVE ADJUSTING SCREW CAP SUCTION DISCHARGE FIGURE 3 MAINTENANCE Series 4197 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 serv
22. utside diameter Rotate the end cap and lip seal counterclockwise and remove Remove the ball bearing See Figure 10 page 7 The casing should be examined for wear particularly in the area between the ports All parts should be checked for wear before the pump is put together When making major repairs such as replacing a rotor and shaft assembly it is advisable to also install a new mechanical seal head and idler pin assembly and idler and bushing assembly See Installation of Carbon Graphite Bushings page 8 Clean all parts thoroughly and examine for wear or damage Check the lipseals ball bearings bushing and idler pin and replace if necessary Check all other parts for nicks burrs excessive wear and replace if necessary In 2005 the use of single seal bearings were phased out Pumps now use Sealed for Life bearings that have seals on both sides For older models wash the bearings in clean solvent Blow out the bearings with compressed air Do not allow the bearings to spin turn them slowly by hand Spinning the bearings will damage the race and balls 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 Replace the bearings if they have roughness 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 ar
23. ve 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 the pump Turn the adjusting screw in to increase the pressure and out to decrease the pressure With discharge line closed at a point beyond pressure gauge the gauge will show the maximum pressure the valve will allow while the pump is in operation IMPORTANT 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 When ordering parts for the pressure relief valve always give the model number and serial number of the pump as it appears on the nameplate and the name of the part wanted When ordering springs be sure to give the pressure setting desired FITNESS FOR A PARTICULAR PURPOS
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