Viking Pump TSM630.3: N-RS Universal Seal - Manual (Page 3)

SECTION TSM 630.3 ISSUE H PAGE 3 OF 13
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.
CIRCULATION LINES: These are standard equipment and
must be hooked up properly. Packed pumps have a flush
line from packing chamber to discharge port. Mechanical
seal pumps have a suckback line from seal chamber to
suction port. If pump rotation is reversed, be sure circulation
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 circulation
line is insulated to assure continued flow.
Jacketed head (R standard, optional on N size) and jacketed
bracket provide large chambers on both sides of the pumping
chamber for improved 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 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 include
a jacketed relief valve for the N pump (only available with
the non-jacketed head). A non-jacketed relief valve is
available for the R pump. The RS pump does not have a
relief valve available.
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 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:
Extra care should be taken in repair of pumps with mechanical
seals. Be sure to read and follow all special instructions
supplied with your pump.
LUBRICATION: External lubrication must be applied slowly
with a hand gun to all lubrication fittings every 500 hours
of operation with multi-purpose grease, NLGI # 2. Refer to
Engineering Service Bulletin ESB-515. Consult factory with
specific lubrication questions. Applications involving very high
or low temperatures will require other types of lubrication.
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 replacement. Refer to instructions under
Assembly on page 6, 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 light 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 Universal Seal Bracket 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)
4. Mechanical seal installation sleeve
2-751-006-630 for 3.4375 inch seal; “N” pumps.
2-751-010-630 for 4.5000 inch seal; “R” and “RS”
Pumps.
5. Bearing locknut spanner wrench
6. Spanner wrench, (Supplied with pump)
Viking Part Number 3-810-009-631
7. Brass bar
8. Arbor press
Series 323A, 323E, 4323A, 324A, 324AH, 4324A, 4324AH,
324E, 324EH, 327A, and 4327A 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.
MAINTENANCE
FIGURE 2
INLET
OR
SUCTION
RELIEF VALVE
ADJUSTING
SCREW
OUTLET
OR
DISCHARGE