Viking Pump TSM430: HL-N 34/434 - Manual (Page 3)

FIGURE 3
EXPLODED VIEW
SERIES 34 & 434 PUMPS (HL SIZE)
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1 Mechanical Seal 8 Packing Retainer Washer 15 Head Gasket Set
2 Nut 9 Casing Bushing 16 Idler Pin
3 Lockwasher 10 Casing (Jacketed) 17 Head (Jacketed) and Idler Pin Assembly
4 Flat Washer 11 Pipe Plug 18 Capscrew
5 Stud 12 Rotor and Shaft Assembly Not Illus. Relief Valve
6 Packing Gland 13 Idler and Bushing Assembly Not Illus. Relief Valve Gasket
7 Packing 14 Idler Bushing Not Illus. Relief Valve Capscrews
SECTION TSM 430 ISSUE G PAGE 3 OF 9
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
in-line pressure relief valve, a torque limiting device or a
rupture disk.
2. There are relief valve options available on these pumps.
Options may include a plain or a jacketed relief valve
depending on the pump size. 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.
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.
MAINTENANCE
Series 34 and 434 jacketed pumps are designed for long,
trouble-free service life under a wide variety of application
conditions with a minimum of maintenance, however, the
following should be considered.
1. 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
ROTATION: Viking pumps operate equally well in a clockwise
or counter clockwise 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.
low temperatures will require other types of lubrication.
Refer to Engineering Service Bulletin ESB-515. Consult
factory with specific lubrication questions.
2. PACKING ADJUSTMENT: New packed pumps generally
require some initial packing adjustment to control leakage
as packing “runs-in”. Make initial packing adjustments
carefully and do not over-tighten the packing gland. After
initial adjustment occasional inspection will reveal the
need for packing gland adjustment and/or replacement
of the packing. See instructions in disassembly and
reassembly regarding re-packing the pump.
3. END CLEARANCE ADJUSTMENT: After long term
operation it is sometimes possible to improve the
performance of the pump, without major repair, through
adjustment of end clearance of the pump. Refer to
instructions under Step 3 of Assembly, page 7.
4. CLEANING PUMP: It is good practice to keep the pump
as clean as possible. This will facilitate inspection,
adjustment and repair work and help prevent omission
of lubrication to fittings covered or hidden with dirt.
5. STORAGE: If 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. Lubricate all fittings. Be
sure to drain all steam jacket chambers to prevent
freezing during cold weather. Tighten all assembly bolts
before the pump is put into service after being stored.
SUGGESTED REPAIR TOOLS: The following tools must be
available to properly repair Series 34 and 434 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. Packing hooks, flexible (packed pumps)
Large for 0.375 inch and up cross section packing
3. Arbor Press
4. Allen wrenches (for mechanical seals)
5. Feeler gage set (for mechanical seals)