Viking Pump TSM142.2: LS-M 225/4225 - Manual (Page 3)

SECTION TSM 142.2 ISSUE E PAGE 3 OF 14
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.
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.
The series 225 and 4225 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 you get this long service life from your pump.
LUBRICATION: External lubrication must be applied slowly
with a hand gun 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.
PACKING ADJUSTMENT: New packed pumps generally
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 and/or replacement of the packing.
Refer to instructions under “Disassembly”, page 6, and
“assembly”, page 7, regarding repacking the pump.
END CLEARANCE ADJUSTMENT: After long term
operation, it is sometimes possible to improve the
performance of the pump, without major repair, through
adjustment of end clearance of the pump. Refer to
Instructions under “Thrust Bearing adjustment”, page
12, for information regarding this procedure.
CLEANING THE PUMP: It is good practice to keep the pump
as clean as possible. This will facilitate inspection, adjustment
and repair work and help prevent omission of lubrication of
fittings covered or hidden with dirt..
STORAGE: If the pump is to be stored or not used for any
appreciable length of time, it should be drained, and then a
light coat of lubricating and preservative oil should be applied
to the internal parts. Lubricate all fittings.
JACKETING of the bracket and head provide large chambers
at both ends of the pumping chamber and around the stuffing
box for temperature control of the product in the pump.
ROTATION: Viking pumps operate equally well in a clockwise
or counterclockwise rotation. When rotation changes, the
suction and discharge is reversed.
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.