Viking Pump TSM312: G-N 32/432 - Manual (Page 3)

SECTION TSM 312 ISSUE G PAGE 3 OF 11
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, a
rupture disk or other device.
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 or a jacketed relief
valve. Pumps equipped with a jacketed head plate are
generally not available with a relief valve.
3. If pump rotation is 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, 2, and 4, page 1.
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 TSM000 and Engineering
Service Bulletin ESB-31.
MaINTENaNCE
Series 32 and 432 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 - Periodic external lubrication should be
applied slowly with a hand gun at all lubrication fittings
provided. A good quality of general purpose grease is
satisfactory in the majority of cases, however, applications
involving very high or low temperatures may require other
types of lubricants. Suggested frequency of lubrication is
once every 500 hours of operation. Do not over-grease.
Refer to Enginnering Service Bulletin ESB-515. Consult
the factory with specific lubrication questions.
PACKING ADJUSTMENT - New packed pumps require
some initial packing adjustment to control leakage as
packing “runs-in”. Make initial packing adjustments carefully
and do not over-tighten the packing gland. After initial
adjustment, occasional inspection will reveal the need for
packing gland adjustment or replacement of the packing.
Refer to instructions under DISaSSEMBLY, page 6 and
aSSEMBLY, page 7 regarding repacking the pump.
CLEANING THE 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 - If the 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 32 and 432 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 (some mechanical seals and set collars)
3. Packing hooks, flexible (packed pumps)
Small for up to 5/16”, G-KK (2-810-049-999).
Large for 3/8” and larger, L size and up (2-810-042-999).
4. Brass bar
5. Arbor press
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.