Viking Pump TSM410.2: H-M 4625 - Manual (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