Viking Pump TSM320.1: C-FH 56/456 - Manual (Page 3)

SECTION TSM 320.1 ISSUE E PAGE 3 OF 7
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.
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. This series of pumps may be equipped with an integral
pressure relief valve. Standard configuration is for
clockwise rotation (suction on the right viewing the shaft
end of the pump) but it also may be ordered for counter
clockwise rotation. The valve cannot be reversed for
opposite rotation.
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.
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
The Series 56 and 456 pumps are designed for long trouble
free life under a wide variety of application conditions with
minimum maintenance, however, the following should be
considered.
1. LUBRICATION – External lubrication not required for
this series of pumps. The liquid being pumped lubricates
the internal bearings in the pump.
2. PACKING ADJUSTMENT – These pumps are designed
with a packing spring to maintain a constant load on
the packing; no external adjustment is possible. When
leakage becomes excessive the packing must be
replaced. Refer to aSSEMBLY, page 4 instruction for
proper installation of packing.
3. END CLEARANCE ADJUSTMENT – After long term
operation it is sometimes possible to improve the
performance of the pump, without major repair, by
adjusting the end clearance. Refer to aSSEMBLY, page
4 instructions for information regarding this procedure.
4. PRESSURE RELIEF VALVE – If your pump is equipped
with a safety relief valve, adjustment can be made as
follows. Remove the adjusting screw cap, turn in the
adjusting screw to increase the pressure and turn-out to
decrease the pressure. If the pump is not producing the
rated capacity adjustment of the safety relief valve may
be necessary. Be sure adjusting screw cap is re-installed
before pump is started.
5. CLEANING THE PUMP – It is good practice to keep the
pump as clean as possible. This will facilitate inspection,
adjustment and repair work.
6. 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 lubricating and preservative oil should be
applied to the internal parts
SUGGESTED REPAIR TOOLS: The following tools must be
available to properly repair Series 56 and 456 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 extractor, flexible
4. Mechanical seal installation sleeve
5. Brass bar
6. Arbor press
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.