Viking Pump TSM154: GG-AL 493/4193 - Manual (Page 3)

SECTION TSM 154 ISSUE D PAGE 3 OF 10
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.
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 these pumps.
Relief valve options include an internal relief valve and a
return to tank 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 figure 5.
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 TSM 000 and Engineering Service
Bulletin ESB-31.
Series 4193 and 493 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.
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 the pump is to be stored, or not used for six
months or more, the pump must be drained and a light coat
of non-detergent SAE 30 weight oil must be applied to all
internal pump parts. Lubricate the fittings and apply grease
to the pump shaft extension. Viking suggests rotating the
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 4193 and 493 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. AlIen wrenches (set screws & special mechanical seals)
3. Snap Ring Pliers
INTERNAL – Viking P/N 2-810-047-999
GG-HJ-HL 4193-493
EXTERNAL – Viking P/N 2-810-029-375
GG-HJ-HL 4193-493
4. Mechanical Seal Installation Sleeve
2-751-001-730 for 0.75 inch seal; GG 4193-493
2-751-004-730 for 1.25 inch seal; AS-AL 4193-493
5. Bearing Locknut Spanner Wrench
2-810-043-375-00
6. Spanner Wrench, adjustable pin type for use on bearing
housing end cap.
2-810-008-375-00
7. Brass bar
8. Arbor press
9. Standard 5/16” 12 point socket.
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.
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.
fIgURE 5
RELIEf VALVE ADJUSTINg SCREW CAP
SUCTION DISCHARgE