Viking Pump TSM143 User Manual
Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com
TECHNICAL SERVICE MANUAL
CONTENTS
Introduction 1
Special Information 2
Maintenance 2
Packed Pumps 4
Mechanical Seal Pumps 8
Optional PTFE Seal 12
Thrust Bearing Adjustment 13
Installation of Carbon Graphite Bushings 13
Pressure Relief Valve Instructions 14
Warranty 15
HEAVY DUTY PUMPS
SERIES 335 AND 4335
SIZES N, R, AND P
SECTION TSM 143
PAGE 1 OF 15
ISSUE E
FIGURE 1
INTRODUCTION
The illustrations used in this manual are for identification
purposes only and cannot be used for ordering parts. Obtain
a parts list from the factory or a Viking® representative.
Always give the complete name of the part, part number
and material with the model number and serial number of
the pump when ordering repair parts. The unmounted pump
or pump unit model number and serial number are on the
nameplate.
In the Viking model number system, basic size letters are
combined with the series number (335 and 4335) indicating
both unmounted or mounted pump unit.
MODEL NUMBER CHART
UNMOUNTED PUMP
PACKED
N335 N4335
R335 R4335
P335 P4335
This manual deals only with Series 335 and 4335 HeavyDuty Pumps. Refer to Figures 1 through 20 for general
configuration and nomenclature used in this manual. Pump
specifications and recommendations are listed in Catalog
Section 143, for series 335 and 4335 Heavy-Duty Pumps.
MECH.
SEAL
Units are designated by the unmounted pump model numbers
followed by a letter indicating drive
style.
P =Commerical Speed Reducers
UNITS
DANGER !
Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve
adjusting cap fitting etc.) be sure:
1. That any pressure in 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 the 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 the above listed precautionary measures may result in serious injury or
death.
VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
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. The suction port
location is where pumping elements (gear teeth) come out
of mesh.
CIRCULATION LINES: are standard equipment (N & R size
only) and must be properly connected. Packed pumps have
a line connected from the packing chamber to the discharge
port. Mechanical seal pumps have a line connected from
the seal chamber to the suction port. If the pump rotation is
reversed be sure the circulation lines are connected to the
suction or discharge port as noted above to avoid excessive
leakage or damage to pump. If the pump is handling heated
product be sure the circulation line is insulated to assure
continued flow.
The jacketed head (R & P only, optional on N size) and
rotor bearing sleeve provide large chambers at both ends
of the pumping chamber for temperature control of product
in the pump. These features do not alter basic steps in the
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. A non-jacketed relief valve is standard on these pumps.
Options include plain and jacketed relief valves. N size
pumps with a jacketed head with a relief valve is not
available . R size pumps are standard with a jacketed
head but also have both plain and jacketed relief valve
available as options. P size pumps are standard with a
jacketed head and non-jacketed relief valve.
3. If the pump rotation is to be reversed during operation,
pressure protection must be provided on both sides of
pump.
4. The relief valve adjusting screw cap must always point
towards suction side of pump. If pump rotation is
reversed, remove the pressure relief valve and turn end
for end. Refer to Figure 2.
5. Pressure relief valves cannot be used to control the pump
flow or regulate the discharge pressure.
For additional information on pressure relief valves, refer to
Technical Service Manual TSM000 and Engineering Service
Bulletin ESB-31.
INLET
OR
SUCTION
OUTLET
OR
DISCHARGE
SPECIAL MECHANICAL SEALS: can be installed in a
modified stuffing box.
Extra care must be taken in the repair of pumps with
mechanical seals. Read and follow all special information
supplied with the pump.
MAINTENANCE
The Series 335 and 4335 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 overgrease. Applications involving very high or low temperatures
will require other types of lubrication. Refer to Engineering
Service Bulleting ESB-515. Consult factory with specific
lubrication questions.
PACKING ADJUSTMENT: New packed pumps require an
initial packing adjustment to control leakage as the packing
“runs in”. Make initial adjustments carefully and do not
over-tighten the packing gland. After the initial adjustment,
inspection will reveal the need for packing gland adjustment
or packing replacement. Refer to instructions under
DISASSEMBLY, page 4, and ASSEMBLY, page 6, regarding
repacking the pump.
CLEANING PUMP: Keep the pump as clean as possible.
This will facilitate inspection; adjustment and repair work and
help prevent overlooking a dirt covered grease fitting.
STORAGE: If the pump is to be stored, or not used for six
months or more, the 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
the pump shaft extension. Viking suggests rotating the 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 335 and 4335 pumps.
These tools are in addition to standard mechanics’ tools such
as open end wrenches, pliers, screwdrivers etc. Most of the
listed items can be obtained from an industrial supply house.
1. Soft Headed Hammer
2. Allen Wrenches (for some mechanical seals and set
collars)
3. Packing hooks, flexible (packed pumps)
Large for 0.375 inch and up cross section packing
4. Bearing locknut spanner wrench
(Source: #471 J.H. Williams & Co. or equal)
5. Spanner wrench (Supplied with pump)
Viking Part Number 3-810-009-631
RELIEF VALVE
ADJUSTING
SCREW CAP
FIGURE 2
SECTION TSM 143 ISSUE E PAGE 2 OF 15
6. Brass Bar
7. Arbor Press
SHAFT
ROLLER
BEARINGS
PACKING
GLAND
ROTOR BEARING
SLEEVE BUSHING
ROTOR BEARING
SLEEVE GASKET
CASING
HEAD GASKET
HEAD
IDLER PIN
END CAP
THRUST
BEARING
HOUSING
BEARING
HOUSING
STAND
PACKING
ROTOR
BEARING
SLEEVE
ROTOR
IDLER
FIGURE 3
CUTAWAY OF PACKED PUMP MODEL N335
RELIEF
VALV E
RELIEF VALVE
ADJUSTING
SCREW CAP
IDLER
BUSHING
SECTION TSM 143 ISSUE E PAGE 3 OF 15
PACKED PUMPS
Model N, R, and P335
FIGURE 4 DETAILS FOR SECTIONAL VIEW - MODELS N, R AND P335
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1 Locknut 11 Packing Gland 21 Nut For Head 31 Bearing Housing Nut
2 Lockwasher 12
3 Bearing Spacer Collar 13 Packing 23 Capscrew For Valve 33
Capscrew for Adjusting
4
Locknut
5 End Cap Lock 15 Casing 25 Internal Relief Valve 35 Rotor Bearing Sleeve Gasket
6 Lip Seal 16 Rotor and Shaft 26 Pipe Plug 36 Pipe Plug
7 End Cap 17 Idler and Bushing 27 Bearing Housing Stand 37 Head Gasket
8 Roller Bearing 18 Idler Bushing 28 Packing Gland Stud 38 Relief Valve Gasket
9 Grease Fitting 19 Idler Pin 29 Packing Gland Nut * Suck Back line Not Illus.
10 Thrust Bearing Housing 20 Head and Idler Pin 30 Bearing Housing Stud
Rotor Bearing Sleeve
& Bushing
Bushing, Rotor
14
Bearing Sleeve
22 Stud For Head 32 Bearing Housing Capscrew
Stud For Rotor Bearing
Sleeve
24 Idler Pin Nut (Not N) 34 Nut For Rotor Bearing Sleeve
SECTION TSM 143 ISSUE E PAGE 4 OF 15
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 the 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.
DISASSEMBLY
1. Mark the head and casing before disassembly to ensure
proper reassembly. The idler pin, which is offset in pump
head, must be positioned towards and equal distance
between the port connections to allow for proper flow of
liquid through the pump.(Refer to figure 5)
It is not necessary to remove the relief valve to take the
head off the pump; however, removing the relief valve
will lessen the total weight of the part. Do not use chain
or cable around the relief value body to support the
head during removal. For PRESSURE RELIEF VALVE
INSTRUCTIONS, refer to page 14.
Remove all nuts from the head. Jackscrews should be
used to back the head away from the casing as shown
in Figure 5. For proper size and length of jackscrews for
pump size refer to the table in Figure 6. The use of a hoist
to support head will facilitate its removal.
Back the head away from casing. Do not allow the idler
to fall from the idler pin. To prevent this, tilt the top of the
head back when removing. Remove the head from pump.
If a hoist is not available, cribbing or blocking can be used
to support head. This will eliminate having to lift the head
into position when reassembling the pump.
2. Remove the head gasket, idler and bushing assembly.
3. Remove the pipe plug from the drain hole in the casing,
this breaks the vacuum behind rotor.
JACKSCREWS
FIGURE 5
THREAD SIZE
A
PUMP
SIZE
N 2 4.00 0.50” - 13 NC
R 2 4.50 0.63” - 11 NC
P 3 5.00 0.50” - 13 NC
4. Remove the packing gland nuts and slide the gland out
of the rotor bearing sleeve.
5. Insert a length of hard wood or brass bar through the
port opening between the rotor teeth to keep the shaft
from turning.
6. Bend the tang on the lock washer up, and with a spanner
wrench remove the locknut and lockwasher from the
shaft. Refer to Figure 7.
7. Remove the length of hardwood or brass bar from the
port opening.
8. Cushion the end of the shaft with a hardwood block or
piece of brass and drive the rotor out of casing, being
careful to avoid damaging the rotor bearing sleeve
bushing. Support the weight of rotor with a hoist. A cable
sling can be used around the shaft, or around rotor
teeth, to carry the weight of the part.
9. Remove the end cap lockscrews, disengage the end cap
locks and with a spanner wrench remove the end caps.
Remove the roller bearings.
10. Remove the nuts and capscrews and take off the thrust
bearing housing. Remove the packing from the rotor
bearing sleeve. NOTE: Model P335 has a lantern ring.
11. Check the rotor bearing sleeve bushing while the rotor
bearing sleeve is mounted on the casing. If worn, the
bushing must be replaced.
Disconnect the circulation line and remove the rotor
bearing sleeve from casing. A press must be used to
remove the old bushing. If the bushing has a shoulder
on the stuffing box end, it must be pressed out through
NO. SCREWS
USED
FIGURE 6
MINIMUM JACKSCREW LENGTH
SECTION TSM 143 ISSUE E PAGE 5 OF 15
A
THREAD SIZE
(INCH)
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