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Special information maintenance – Viking Pump TSM154: GG-AL 493/4193 User Manual

Page 3

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SECTION TSM 154

ISSUE

D

PAGE 3 OF 10

SPECIAL INfORMATION

MAINTENANCE

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.

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.

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.

Series 4193 and 493 pumps are designed for long, trouble-

free service life under a wide variety of application conditions

with a minimum of maintenance. The points listed below will

help provide long service life.
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.

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.

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.

fIgURE 5

RELIEf VALVE ADJUSTINg SCREW CAP

SUCTION

DISCHARgE