Vilter VSM 71-701 Operation And Service Manual Download

Page: 210 / 244

SPECIAL 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.

PRESSURE RELIEF VALVES:

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.

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.

If pump rotation is reversed during operation, pressure

protection must be provided on

both

sides of pump.

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.

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.

MAINTENANCE

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 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 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.

Soft Headed hammer

AlIen wrenches (set screws & special mechanical seals)

Snap Ring Pliers

INTERNAL – Viking Part No. 2-810-047-999

GG-HJ-HL

4195-495

EXTERNAL – Viking Part No. 2-810-029-375

GG-HJ-HL

4195-495

Mechanical Seal Installation Sleeve

2-751-001-900 for 0.75 inch seal; GG 4195-495
2-751-004-900 for 1.25 inch seal; AS-AL 4195-495

Bearing Locknut Spanner Wrench

(Source: #471 J.H. Williams & Co. or equal)

Spanner Wrench, adjustable pin type for use on bearing
housing end cap.

(Source: #482 J.H. Williams & Co. or equal)

Brass bar

Arbor press

SPECIAL INFORMATION

RELIEF VALVE ADJUSTING SCREW CAP

DISCHARGE

SUCTION

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 Teflon seals in
these pumps. Contact factory for specific information.

DANGER

BEFORE OPENING ANY VIKING PUMP LIQUID
CHAMBER (PUMPING CHAMBER,
RESERVOIR, RELIEF VALVE ADJUSTING CAP
FITTING ETC.) BE SURE:

THAT ANY PRESSURE IN CHAMBER

HAS BEEN COMPLETELY VENTED
THROUGH SUCTION OR DISCHARGE
LINES OR OTHER APPROPRIATE
OPENINGS OR CONNECTIONS.

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.

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.

FIGURE 5

PAGE 2 OF 9

ISSUE B

SECTION TSM 144