Viking Pump TSM144: GG-AL 495/4195 - Manual (Page 3)

SECTION TSM 144 ISSUE H PAGE 3 OF 10
SPECIAL INFORMATION
MAINTENANCE
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. 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 the pump.
4. The relief valve adjusting screw cap must always point
towards the suction side of the pump. If pump rotation is
reversed, remove the pressure relief valve and turn end
for end. Refer to Figure 5.
5. Pressure relief valves should not be used to control 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 4195 and 495 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 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, the pump must be drained and a light coat of
non-detergent SAE 30 weight oil must be applied to all internal
pump parts. Apply grease to the 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 4195 and 495 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 (set screws & special mechanical seals)
3. Snap Ring Pliers
INTERNAL – Viking Part No. 2-810-047-999
G-GG-H-HJ-HL 4195-495
EXTERNAL – Viking Part No. 2-810-029-375
G-GG-H-HJ-HL 4195-495
4. Mechanical Seal Installation Sleeve
2-751-001-730 for 0.75 inch seal; G-GG 4195-495
2-751-004-730 for 1.25 inch seal; AS-AL 4195-495
5. Bearing Locknut Spanner Wrench – 2-810-043-375
6. Spanner Wrench, adjustable pin type for use on bearing
housing end cap. – 2-810-008-375
7. Brass bar
8. Arbor press
9. Standard 5/16” 12 point socket
SPECIAL MECHANICAL SEALS:
This bulletin illustrates the mechanical seal which is
standard in the catalog pump. A Seal Installation Drawing
will be furnished with a pump fitted with a non-standard
mechanical seal. Consult this Seal Installation Drawing
before disassembling pump.
Modifications are required to install PTFE mechanical seals
in these pumps. Contact the factory for specific information.
ROTATION: Viking pumps operate equally well in a clockwise
or counterclockwise rotation. Shaft rotation determines which
port is suction and which is discharge. Suction Port is where
pumping elements (gear teeth) come out of mesh.
FIGURE 5
RELIEF VALVE ADJUSTING SCREW CAP
SUCTION DISCHARGE
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.