Viking Pump TSM153: N-R 333/4333 - Manual (Page 3)

SECTION TSM 153 ISSUE D PAGE 3 OF 16
MAINTENANCE
INLET
OR
SUCTION
OUTLET
OR
SUCTION
RELIEF
VALVE
ADJUSTINg
SCREW
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. Port in area where
pumping elements (gear teeth) come out of mesh is suction
port.
FLUSH LINES: are standard equipment and must be hooked
up properly. Packed pumps have a flush connection from
packing chamber to suction port. Mechanical seal pumps
have a flush connection from seal chamber to discharge port.
If pump rotation is reversed be sure flush connections are
hooked up to the suction or discharge port as noted above
to avoid excessive leakage or damage to pump. If pump
is handling heated product be sure flush line is insulated to
assure continued flow.
Jacketed head (R only, optional on N size) and rotor bearing
sleeve provide large chambers at both ends of pumping
chamber for temperature control of product in pump. These
features do not alter basic steps in disassembly and assembly
of your pump.
PRESSURE RELIEF VALVES:
1. Viking pumps are positive placement 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.
Options include a jacketed relief valve. Pumps equipped
with a jacketed head plate are generally not available
with a relief 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 Figures 1 and 2.
5. Pressure relief valves cannot 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 MECHANICAL SEALS: can be installed in a
modified stuffing box.
Extra care must be taken in repair of pumps with mechanical
seals. Read and follow all special information supplied with
the pump.
Series 333 and 4333 pumps are designed for long trouble
free life under a wide variety of application conditions with a
minimum of maintenance. The points listed below will help
provide long service life.
LUBRICATION: External lubrication must be applied slowly
with a handgun to all lubrication fittings every 500 hours of
operation with multi-purpose grease, NLGI # 2. Do not over-
grease. Applications involving very high or low temperatures
will require other types of lubrication. Refer to Engineering
Service Bulletin ESB-515. Consult factory with specific
lubrication questions.
PACKING ADJUSTMENT: New packed pumps require initial
packing adjustment to control leakage as packing “runs in”.
Make initial adjustments carefully and do not over-tighten
packing gland. After initial adjustment, inspection will reveal
need for packing gland adjustment or packing replacement.
Refer to instructions under DISASSEMBLY, page 5, and
Assembly, page 7, regarding repacking pump.
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 333 and 4333 pumps.
These tools are in addition to standard mechanics’ tools such
as open end wrenches, pliers, screwdrivers 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)
Large for 0.375 inch and up cross section packing
4. Mechanical seal installation sleeve
5. Bearing locknut spanner wrench
(Source: #471 J.H. Williams & Co. or equal)
6. Spanner wrench (Supplied with pump)
Viking Part Number 3-810-009-631
7. Brass Bar
8. Arbor Press
FIgURE 2