Special information maintenance – Viking Pump TSM445: LVP Vane Pumps User Manual

Page 3

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SECTION TSM 445

ISSUE

C

PAGE 3 OF 11

ROTATION: Viking LVP pumps are clockwise rotation (from

shaft to end) standard, but they operate well in a clockwise or

counterclockwise rotation, with some simple rearrangement of

parts. The relief valve and internal plugs must be rearranged

for counterclockwise rotation. See

“Special Requirements

for Reverse Rotation” details on page 7.
Shaft rotation determines which port is suction and which

is discharge. Viking LVP pumps have internal casing/head

lubrication lines. Ensure these lines are setup correctly prior

to operation. See

“Assembly” section, page 7.

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, or other method.

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.

NOTE: Pump can be operated in reverse direction for

short duration at low differential pressure to clean/flush

out lines.
3.
If pump rotation is to be 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 suction side of pump. If pump rotation

is reversed, remove pressure relief valve and turn end

for end or use external pressure relief means.

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 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.

Series LVP pumps are designed for long, trouble-free service

life under a wide variety of application conditions with a

minimum of maintenance. The following points will help

provide long service life.
Pumps that are mounted directly to the motor will need to be

removed from the mounting bracket to perform mechanical

seal maintenance or replacement.
CLEANING PUMP: Keep the pump as clean as possible.

This will facilitate inspection, adjustment, and repair work.
STORAGE: If pump is to be stored, or not used for six

months or more, the pump must be drained and a light coat

of light oil must be applied to all internal pump parts.
Apply grease to the pump shaft extension. Viking suggests

rotating pump shaft by hand one complete revolution every

30 days to circulate the oil. Tighten all pump assembly bolts

before putting the pump in service after being stored.

SPECIAL MECHANICAL SEALS:

Extra care should be taken in the repair of these pumps.

Be sure to read and follow all special instructions supplied

with your pump.

SUGGESTED REPAIR TOOLS: The following tools must be

available to properly repair series LVP pumps. These tools

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. Allen wrenches (some mechanical seals and set

collars)

3. Brass bar
4. Arbor press

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