Viking-pump TSM410.2: H-M 4625 User Manual download pdf (Page 3)

SECTION TSM 410.2 ISSUE D PAGE 3 OF 10

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.

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.

MAINTENANCE

ROTATION: Viking pumps operate equally well in a clockwise

or counter-clockwise 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 those pump

models designed to accept a relief valve. Options may

include a return to tank relief valve and a jacketed relief

valve. Pumps equipped with a jacketed head plate are

generally not available with a relief 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 Figures 1 and 2, page 1.

Series 4625 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.

LUBRICATION: External lubrication must be applied slowly

with a handgun to all lubrication fittings every 500 hours of

operation with multi-purpose grease, NLGI # 2. Do not over-

grease. Applications involving very high or low temperatures

will require other types of lubrication. Refer to Engineering

Service Bulletin ESB-515. Consult factory with specific

lubrication questions.

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 pump is to be stored, or not used for six months

or more, pump must be drained and a light coat of non-

detergent SAE 30 weight oil must be applied to all internal

pump parts. Lubricate fittings and apply grease to 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 4625 pumps. These are

in addition to standard mechanics’ tools such as open end

wrenches, pliers, screwdrivers etc. Most of the items can be

obtained from an industrial supply house.

1. Soft Headed Hammer

2. Mechanical seal installation sleeve

2-751-002-900 for 1.125 inch seal; H & HL 4625

2-751-003-900 for 1.4375 inch seal; K & LL 4625

2-751-005-630 for 2.4375 inch seal; Q and M4625

3. Bearing locknut spanner wrench

(Source: #471 J.H. Williams & Co. or equal)

4. Spanner wrench, adjustable pin type for use on double

end caps (Source #482 J.H. Williams & Co or equal)

5. Brass Bar

6. Arbor Press

7. Standard 5/16” 12 point socket

5. Pressure relief valves cannot be used to control pump

flow or regulate discharge pressure.

For additional information on pressure relief valves, Refer

to Technical Service Manual TSM000 and Engineering

Service Bulletin ESB-31.

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.

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Viking-pump TSM410.2: H-M 4625 User Manual Page 3

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