Viking Pump TSM212: H-LL 724/4724 - Manual (Page 3)

SECTION TSM 212 ISSUE F PAGE 3 OF 9
SUGGESTED REPAIR TOOLS: The following tools must
be available to properly repair Series 724 and 4724 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)
H, HL - 1/4” (2-810-049-999)
K and up - 3/8” and larger (2-810-042-999)
4. Mechanical seal installation sleeve
5. Bearing locknut spanner wrench (2-810-044-375)
6. Spanner wrench, adjustable pin type for use on double
end caps (2-810-008-375)
7. Brass bar
8. Arbor press
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 figure 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.
SPECIAL INfORMATION
MAINTENANCE
Series 724 and 4724 pumps are designed for long, trouble-
free service life under a wide variety of application conditions
with a minimum of maintenance, however, the following
should be considered.
1. 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. Consult the factory if you have specific
lubrication questions.
2. PACKING ADJUSTMENT - New packed pumps, (Series
724) 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. See instructions in
DISASSEMBLY and ASSEMBLY regarding repacking
the pump.
3. 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 ASSEMBLY of the pump for
information regarding this procedure.
4. 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 to fittings covered or hidden with dirt.
5. STORAGE - If the pump is to be stored or not used for
any appreciable length of time it should 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.
DISASSEMBLY
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.