Viking Pump TSM154 User Manual

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TECHNICAL SERVICE MANUAL

HEAVY-DUTY BRACKET MOUNTED PUMPS

CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . 1

Special Information . . . . . . . . . . . . . . . . . . . 2

Special Mechanical Seals. . . . . . . . . . . . . . . . 2

Disassembly. . . . . . . . . . . . . . . . . . . . . . . 3

Assembly . . . . . . . . . . . . . . . . . . . . . . . . 5

Thrust Bearing Adjustment . . . . . . . . . . . . . . . 7

Installation of Carbon Graphite Bushings . . . . . . . . 7

Pressure Relief Valve Instructions . . . . . . . . . . . 7

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.

SECTION TSM 154

PAGE 1 Of 10

SERIES 4193 AND 493

ISSUE D

SIZES GG - AL

FIGURE 1

GG, HJ and HL4193 SERIES

Foot Type Unmounted Pump with Flanged Ports

In the Viking model number system, basic size letters are combined with series number (4193 and 493) are used to indicate either an unmounted pump or mounted pump unit.

UNMOUNTED PUMP UNITS

Foot Mounted

GG4193

HJ4193

HL4193

AS4193

AK4193

AL4193

Flange Mounted

GG493

HJ493

HL493

AS493

AK493

AL493

This manual deals only with Series 4193 and 493 Heavy Duty Pumps. Refer to Figures 1 through 14 for general configuration and nomenclature used in this manual. Pump specifications and recommendations are listed in Catalog Section 154, Series 4193 and 493 Heavy Duty Pumps.

Units are designated by the unmounted pump model numbers followed by a letter(s) indicating drive style.

D = Direct Drive

M = Horizontal Direct Drive

IM = Vertical In-Line Direct Drive

IOM = Vertical In-Line Direct

Drive with Piping Support Hangers

FIGURE 2

AS, AK and AL4193 SERIES

Foot Type Unmounted Pump with Flanged Ports

FIGURE 3

GG, HJ and HL493 SERIES

Unmounted Pump with Flanged Ports

FIGURE 4

AS, AK and AL493 SERIES

Unmounted Pump with Flanged Ports

VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA

Page 2

SAFETY INFORMATION AND INSTRUCTIONS

IMPROPER INSTALLATION, OPERATION OR MAINTENANCE OF PUMP MAY CAUSE SERIOUS INJURY OR DEATH AND/OR RESULT IN DAMAGE TO PUMP AND/OR OTHER EQUIPMENT. VIKING’S WARRANTY DOES NOT COVER FAILURE DUE TO IMPROPER INSTALLATION, OPERATION OR MAINTENANCE.

THIS INFORMATION MUST BE FULLY READ BEFORE BEGINNING INSTALLATION, OPERATION OR MAINTENANCE OF PUMP AND MUST BE KEPT WITH PUMP. PUMP MUST BE INSTALLED, OPERATED AND MAINTAINED ONLY BY SUITABLY TRAINED AND QUALIFIED PERSONS.

THE FOLLOWING SAFETY INSTRUCTIONS MUST BE FOLLOWED AND ADHERED TO AT ALL TIMES.

Symbol Legend :

WARNING

Danger - Failure to follow the indicated

instruction may result in serious injury

or death.

BEFORE opening any liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, etc.) be sure that :

● 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 the 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:

● It is clean and free from debris

● 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.

WARNING

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 NOT 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.

SECTION TSM 154 ISSUE D PAGE 2 OF 10

Page 3

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.

SUCTION

RELIEF VALVE ADJUSTING SCREW CAP

DISCHARGE

2. That the driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational so that it cannot be started while work is being done on pump.

3. That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid. Obtain a material safety data sheet (MSDS) for the liquid to be sure these precautions are understood.

Failure to follow above listed precautionary measures may result in serious injury or death.

ROTATION: Viking pumps operate equally well in a clockwise or counterclockwise rotation. Shaft rotation determines which port is suction and which is discharge. Port in area where pumping elements (gear teeth) come out of mesh is Suction Port.

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 valve.

3. If 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 pressure relief valve and turn end for end. Refer to Figure 5.

5. Pressure relief valves should not be used to control pump 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.

FIGURE 5

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.

MAINTENANCE

Series 4193 and 493 pumps are designed for long, troublefree service life under a wide variety of application conditions with a minimum of maintenance. The points listed below will help provide long service life.

CLEANING PUMP: Keep 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 the 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 4193 and 493 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. AlIen wrenches (set screws & special mechanical seals)

3. Snap Ring Pliers

INTERNAL – Viking P/N 2-810-047-999 GG-HJ-HL 4193-493 EXTERNAL – Viking P/N 2-810-029-375 GG-HJ-HL 4193-493

4. Mechanical Seal Installation Sleeve 2-751-001-730 for 0.75 inch seal; GG 4193-493 2-751-004-730 for 1.25 inch seal; AS-AL 4193-493

5. Bearing Locknut Spanner Wrench 2-810-043-375-00

6. Spanner Wrench, adjustable pin type for use on bearing housing end cap.

2-810-008-375-00

7. Brass bar

8. Arbor press

9. Standard 5/16” 12 point socket.

SECTION TSM 154 ISSUE D PAGE 3 OF 10

Page 4

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.

2. That the driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational so that it cannot be started while work is being done on pump.

Failure to follow above listed precautionary measures may result in serious injury or death.

1. Refer to figures 7 & 8 on page 4 for model to be

disassembled and name of parts. Models 4193 & 493 are disassembled and assembled the same. The difference between these models is the casings.

2. Mark the head and casing before disassembly to ensure proper reassembly.

3. NOTE: The four valve capscrews, valve and gasket must be removed from the GG 4193-493 model before the six head capscrews are removed.

Remove the head capscrews.

4. Remove the head from the pump. Do not allow the idler to fall from the idler pin. Tilt the top of the head back when removing to prevent this. Avoid damaging the head gasket.

5. Remove the idler and bushing assembly. If the the idler bushing needs replacing, see “Installation of Carbon

Graphite Bushings”, page 7.

6. Remove the locknut from the shaft. See Figure 9 or 10.

A brass bar or piece of hardwood inserted in the port opening and between the rotor teeth will keep the shaft from turning.

7. Loosen the two setscrews in the face of the bearing housing and turn the thrust bearing assembly counterwise and remove from the casing. See Figure

9 or 10.

8. Remove the snap ring from the shaft for GG, HJ and HL size pumps. See Figure 9.

9. Remove the bearing spacer from the shaft for AS, AK

and AL size pumps. See Figure 10.

10. Remove the brass bar or piece of hardwood from the port opening.

MECHANICAL SEAL

SHAFT

CASING

BALL BEARINGS

IDLER

ROTOR

HEAD

IDLER PIN

RELIEF VALVE

FIGURE 6

CUTAWAY FOR MODELS GG, HJ AND HL4193

SECTION TSM 154 ISSUE D PAGE 4 OF 10

CASING

Page 5

6 7

FIGURE 7 - EXPLODED VIEW FOR MODELS GG, HJ AND HL 4193 AND 493

ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART

1 Locknut 8 Casing (4193) 14 Head Gasket

2 Snap Ring (Outer) 8A Casing (493) 15 Idler Pin

3 Ball Bearing (Outer) 9 Pipe Plug 16 Head and Idler Pin Assembly

4 Snap Ring for Shaft 10 Mechanical Seal 17 Capscrew for Head

5 Bearing Housing 11 Rotor and Shaft Assembly 18 Gasket for Relief Valve

6 Snap Ring (Inner) 12 Idler Bushing 19 Relief Valve

7 Ball Bearing (Inner) 13 Idler and Bushing Assembly 20 Capscrew for Valve

2421

FIGURE 8 - EXPLODED VIEW FOR MODELS AS, AL AND AL 4193 AND 493

ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART

1 Locknut 9 Bearing Retainer Washer 16 Mechanical Seal

2 Bearing Spacer Collar 10 Casing (4193) 17 Idler Bushing

3 End Cap for Bearing Housing 10A Casing (493) 18 Idler and Bushing Assembly

4 Lip Seal for Bearing Housing 11 Gasket for Relief Valve 19 Head Gasket

5 Ball Bearing (Outer) 12 Relief Valve 20 Idler Pin

6 Bearing Housing 13 Pipe Plug 21 Check Valves

7 Bearing Spacer 14 Capscrews for Valve 22 Head and Idler Pin Assembly

8 Ball Bearing (Inner) 15 Rotor and Shaft Assembly 23 Capscrews for Head

SECTION TSM 154 ISSUE D PAGE 5 OF 10

Page 6

BALL BEARING

OUTER SNAP RING

LOCKNUT

SHAFT

BEARING HOUSING

SETSCREW

INNER BALL BEARING

INNER

SNAP RING

SHAFT SNAP RING

FIGURE 9

THRUST BEARING ASSEMBLY GG, HJ AND HL SIZES

BALL BEARING

SETSCREW

NYLON INSERT

END CAP LIP SEAL

SHAFT

LOCKNUT

BEARING HOUSING

SETSCREW

RETAINER WASHER

BALL BEARING

BEARING SPACER

BEARING

INNER

FIGURE 10

THRUST BEARING ASSEMBLY AS, AK AND AL SIZES

11. 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 rotor and shaft.

12. Remove the inner snap ring and single row ball bearing from the casing. See figure 9. The AS, AK & AL size pumps do not have this snap ring.

13. Remove the bearing retainer washer from the AS, AK or

AL size pumps. See figure 10.

14. Remove the seal seat or stationary part of seal from casing.

15. Disassemble thrust bearing assembly. Remove outer snap ring from bearing housing for GG, HJ or HL size pumps and ball bearing can be removed. See figure 9.

16. The AS, AK and AL thrust bearing assembly has an end cap and lip seal that can be removed after loosening two set screws in flange of bearing housing. Remove ball bearing. See figure 10.

The casing should be examined for wear, particularly in the area between ports. All parts should be checked for wear before pump is put together.

When making major repairs, such as replacing a rotor and shaft; it is advisable to also install a new mechanical seal, head and idler pin, idler and bushing. See “Installation of

Carbon Graphite Bushings” page 7.

Clean all parts thoroughly and examine for wear or damage. Check lip seals, ball bearings, bushing and idler pin and replace if necessary. Check all other parts for nicks, burrs, excessive wear and replace if necessary.

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 area will provide leakage paths under the mechanical seal. Use a fine emery cloth to remove scratches or sharp edges.

ASSEMBLY

Standard Mechanical Seal (Synthetic Rubber Bellows Type)

READ CAREFULLY BEFORE REASSEMBLING PUMP

The seal used in this pump simple to install and good performance will result if care is taken during installation.

The principle of mechanical seal is contact between the rotary and stationary members. These parts are lapped to a high finish and their sealing effectiveness depends on complete contact.

Prior to installing rotating portion of mechanical seal, prepare rotor and shaft assembly, head and idler assemblies and appropriate gaskets for quick assembly.

Once rotating portion of mechanical seal is installed on rotor and shaft assembly, it is necessary to assemble parts as quickly as possible to ensure the seal does not stick to shaft in wrong axial position. The seal should be expected to stick to the shaft after several minutes setting time.

Never touch sealing faces with anything except clean hands or clean cloth. Minute particles can scratch the seal faces and cause leakage.

1. Coat idler pin with non-detergent SAE 30 weight oil and place idler and bushing in idler pin on head. If replacing a carbon graphite bushing, refer to installation of Carbon

Graphite Bushings, page 7.

2. Clean rotor, hub and casing seal housing bore. Make

sure both are free from dirt and grit. Coat outer diameter of seal seat and inner diameter of seal housing bore with non-detergent SAE 30 weight oil.

3. Start seal seat in seal housing bore. If force is necessary, protect seal face with a clean cardboard disc and gently tap it in place with a hammer using a piece of wood.

SECTION TSM 154 ISSUE D PAGE 6 OF 10

Page 7

SPRING

COAT WITH LIGHT OIL BEFORE ASSEMBLY

MECHANICAL SEAL (ROTARY MEMBER)

TAPERED SLEEVE

FIGURE 11

ROTOR HUB

SPRING

SHAFT

MECHANICAL SEAL (ROTARY MEMBER)

FIGURE 12

4. Place tapered installation sleeve on shaft, refer to Figure 11. Sleeve is furnished with GG, AS, AK and AL

size replacement mechanical seals. Coat rotor and shaft assembly, tapered installation sleeve and inner diameter of mechanical seal rotary member with a generous amount of non-detergent SAE 30 weight oil. Petrolatum may be used but grease is not recommended.

5. Place seal spring on shaft against rotor hub. Refer to Figure 12.

6. Slide rotary member, lapped contact surface facing away

from spring, over installation sleeve on shaft until it is against the spring.

7. Do not compress the spring.

8. Coat the rotor and shaft assembly with non-detergent

SAE 30 weight oil. Taking care not to damage the seal seat, start end of shaft in bracket bushing and turn from right to left, slowly pushing until the ends of the rotor teeth are just below the face of the casing.

9. Leave the rotor in this position. Withdrawal of rotor and shaft may displace the carbon seal rotating face and result in damage to the seal.

10. Place O-ring gasket on head and install head and idler assembly on pump. Pump head and casing were marked before disassembly to ensure proper reassembly. If not, be sure idler pin, which is offset in pump head, is positioned toward or equal distance between port connections to allow for proper flow of liquid through pump.

11. Tighten head capscrews evenly.

12. If pump was equipped with a relief valve and was

removed during disassembly, install with new o-rings or gaskets. Relief valve adjusting screw cap must always point towards suction port. Refer to Figure 5, page 2. For relief valve repair or adjustments, see PRESSURE

RELIEF VALVE INSTRUCTIONS, Page 7.

13. 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. For older models with single seal bearings, pack the inner ball bearing with multi-purpose grease, NLGI #2

NOTE: AS, AK and AL size pumps do not have a snap ring, a bearing retainer washer must be assembled over end of shaft before the bearing is assembled. See figure

10.

14. Place bearing spacer over shaft and against single row ball bearing in casing (AS, AK and AL size pumps). See figure 10.

Install snap shaft ring in groove in the shaft (GG, HJ and HL size pump. See figure 8.

15. Pack lubrication chamber between inner ball bearing and double row ball bearing in the thrust bearing assembly approximately half full with multi-purpose grease, NLGI#2.

See figures 9 and 10.

16. Pack double row ball bearing with multi-purpose grease,

NLGI#2 and press into bearing housing with shield side toward coupling end of shaft. See Figure 9. (AS, AK and AL size pumps do not use a shielded bearing). Install snap ring to hold bearing in place on GG, HJ and HL size pumps.

NOTE: On AS, AK and AL size pumps, install lip seal in bearing house end cap. The lip should face towards end of shaft. Put bearing spacer sleeve in lip seal and install in bearing housing and tighten setscrews securely. See

figure 20.

17. Insert a piece of brass or hard wood through port opening

between rotor teeth to keep shaft from turning.

18. Start thrust bearing assembly into casing. Turn by hand until tight. This forces rotor against head. Replace and tighten locknut on shaft.

19. Remove brass piece or hardwood from port opening. Adjust pump end clearance, refer to page 7.

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 154 ISSUE D PAGE 7 OF 10

Page 8

THRUST BEARING ADJUSTMENT

See Figures 9 and 10.

Loosen two screws in face of thrust bearing assembly.

If shaft cannot be rotated freely, turn thrust bearing assembly counterclockwise until shaft can be turned easily.

To set end clearance:

1. While turning rotor and shaft assembly, rotate thrust

bearing assembly clockwise until noticeable drag occurs. This is zero end clearance.

2. Mark position of bearing housing with respect to the casing.

3. Rotate thrust bearing assembly counterclockwise the distance listed below as measured on outside of bearing housing.

4. Tighten two setscrews in face of bearing housing after adjustment is made to secure thrust bearing assembly position.

For viscosities above 2500 SSU, add additional end

clearance (0.005” for GG, HJ and HL size pumps and

0.007” for AS, AK and AL size pumps).

PUMP

SIZE

GG 7/16” 0.003”

DISTANCE IN INCHES ON O.D. OF BEARING

HOUSING

END

CLEARANCE

PRESSURE RELIEF VALVE INSTRUCTIONS

VALVE - GG, HJ and HL SIZES

VALVE - LIST OF PARTS

1. Cap 6. Valve Body

2. Adjusting Screw 7. Spring

3. Lock Nut 8. Poppet

4. Spring Guide 9. Cap Gasket

5. Bonnet

FIGURE 13

HJ, HL 9/16” 0.003”

AS, AK, AL 1/2” 0.003”

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 in installation. The additional precautions listed below must be followed for proper installation:

1. A press must be used for installation.

2. Be certain bushing is started straight.

3. Do not stop pressing operation until bushing is in proper

position, starting and stopping may result in a cracked bushing.

4. Check bushing for cracks after installation.

VALVE - AS, AK and AL SIZES

VALVE - LIST OF PARTS

1. Cap 6. Valve Body

2. Adjusting Screw 7. Spring

3. Lock Nut 8. Poppet

4. Spring Guide 9. Cap

5. Bonnet 10. Bonnet

FIGURE 14

SECTION TSM 154 ISSUE D PAGE 8 OF 10

Page 9

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.

2. That the driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational so that it cannot be started while work is being done on pump.

Failure to follow above listed precautionary measures may result in serious injury or death.

Mark valve and head before disassembly to ensure proper reassembly.

1. Remove valve cap.

2. Measure and record length of extension of adjusting screw. Refer to “A” on Figures 13 and 14.

3. Loosen locknut and back out adjusting screw until spring

pressure is released.

4. Remove bonnet, spring guide, spring and poppet from valve body. Clean and inspect all parts for wear or damage and replace as necessary.

ASSEMBLYDISASSEMBLY

Reverse procedures outlined under Disassembly. If valve is removed for repairs, be sure to replace in same position. Relief valve adjusting screw cap must always point towards suction side of pump. If pump rotation is reversed, remove relief valve and turn end for end. Refer to Figures 5, page 2.

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.

PRESSURE ADJUSTMENT

If a new spring is installed or if pressure setting of pressure relief valve is to be changed from that which the factory has set, the following instructions must be carefully followed.

1. Install a pressure gauge in the discharge line for actual adjustment operation.

2. 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 the pump.

3. Turn the adjusting screw in to increase the pressure and out to decrease the pressure.

4. With the discharge line closed at a point beyond the pressure gauge, gauge will show the maximum pressure the valve will allow while the 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.

SECTION TSM 154 ISSUE D PAGE 9 OF 10

Page 10

TECHNICAL SERVICE MANUAL

HEAVY-DUTY BRACKET MOUNTED PUMPS

SERIES 4193 AND 493

SIZES GG - AL

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 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.

SECTION TSM 154

PAGE 10 OF 10

ISSUE D

VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA