Viking Pump TSM320.1 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

GENERAL PURPOSE HUB MOUNTED PUMPS

CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . 1

Special Information . . . . . . . . . . . . . . . . . . . 1

Pressure Relief Valves . . . . . . . . . . . . . . . . . 2

Maintenance . . . . . . . . . . . . . . . . . . . . . . 2

Disassembly . . . . . . . . . . . . . . . . . . . . . . 2

Installing Casing Bushing . . . . . . . . . . . . . . . . 4

Assembly . . . . . . . . . . . . . . . . . . . . . . . . 4

Pressure Adjustment . . . . . . . . . . . . . . . . . . 5

Special Pump Designs . . . . . . . . . . . . . . . . . 5

INTRODUCTION

The illustrations used in this maintenance bulletin are for
identification purposes only and should not be used for
ordering parts. Secure a parts list from the factory or a
Viking representative. Always give complete name of part,
part number and material with the model and serial number
of the pump when ordering repair parts.

SECTION TSM 320.1

PAGE 1 Of 7

SERIES 56 AND 456

ISSUE E

SIZES C - F - FH

FIGURE 1

SERIES 56M AND 456M PUMP

(3 GPM Size Shown)

Packed Or Mechanical Seal Type.

Valve On Casing - Clockwise Rotation

UNMOUNTED PUMP UNITS

PACKED MECH. SEAL

C56 C456

F56 F456

FH56 FH456

This manual deals exclusively with Pump Models C, F,
FH56M and C, F, FH456M General Purpose Pumps. Refer
to Figures 1, 2, 4, and 7 for general configuration and
nomenclature used in this bulletin.

All pumps can be furnished with either a mechanical seal or
packing. Packed pumps are furnished with suitable packing
for the liquid pumped. A seal pump can be changed to a
packed pump by removing the mechanical seal and inserting
the packing spring, inner packing gland, packing and outer
packing gland. The mechanical seal pump is dimensionally
interchangeable with the packed pump.

Units are designated by the
unmounted pump model
numbers followed by a letter
indicating drive style.

M = Motor Mounted Unit

SPECIAL INFORMATION

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.

VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA

SAFETY INFORMATION AND INSTRUCTIONS

IMPROPER INSTALLATION, OPERATION OR MAINTENANCE OF PUMP MAY CAUSE SERIOUS INJURY
OR DEATH AND/OR RESULT IN DAMAGE TO PUMP AND/OR OTHER EQUIPMENT. VIKING’S WARRANTY
DOES NOT COVER FAILURE DUE TO IMPROPER INSTALLATION, OPERATION OR MAINTENANCE.

THIS INFORMATION MUST BE FULLY READ BEFORE BEGINNING INSTALLATION, OPERATION OR
MAINTENANCE OF PUMP AND MUST BE KEPT WITH PUMP. PUMP MUST BE INSTALLED, OPERATED
AND MAINTAINED ONLY BY SUITABLY TRAINED AND QUALIFIED PERSONS.

THE FOLLOWING SAFETY INSTRUCTIONS MUST BE FOLLOWED AND ADHERED TO AT ALL TIMES.

Symbol
Legend :

!

!

!

!

!

WARNING

!

WARNING

Danger - Failure to follow the indicated

instruction may result in serious injury

!

or death.

BEFORE opening any liquid chamber (pumping
chamber, reservoir, relief valve adjusting cap fitting,
etc.) be sure that :

● Any pressure in the chamber has been completely
vented through the suction or discharge lines or
other appropriate openings or connections.

● The pump drive system means (motor, turbine,
engine, etc.) has been “locked out” or otherwise
been made non-operational so that it cannot be
started while work is being done on the pump.

● You know what material the pump has been
handling, have obtained a material safety data
sheet (MSDS) for the material, and understand
and follow all precautions appropriate for the safe
handling of the material.

BEFORE operating the pump, be sure all drive guards
are in place.

DO NOT operate pump if the suction or discharge
piping is not connected.

DO NOT place fingers into the pumping chamber or
its connection ports or into any part of the drive train
if there is any possibility of the pump shafts being
rotated.

DO NOT exceed the pumps rated pressure, speed, and
temperature, or change the system/duty parameters
from those the pump was originally supplied, without
confirming its suitability for the new service.

BEFORE operating the pump, be sure that:

● It is clean and free from debris

● all valves in the suction and discharge pipelines

are fully opened.

● All piping connected to the pump is fully supported

and correctly aligned with the pump.

● Pump rotation is correct for the desired direction

of flow.

WARNING

WARNING

!

WARNING

!

!

!

WARNING

!

WARNING

Warning - In addition to possible serious

injury or death, failure to follow the
indicated instruction may cause damage
to pump and/or other equipment.

INSTALL pressure gauges/sensors next to the
pump suction and discharge connections to monitor
pressures.

USE extreme caution when lifting the pump. Suitable
lifting devices should be used when appropriate. Lifting
eyes installed on the pump must be used only to lift
the pump, not the pump with drive and/or base plate.
If the pump is mounted on a base plate, the base plate
must be used for all lifting purposes. If slings are used
for lifting, they must be safely and securely attached.
For weight of the pump alone (which does not include
the drive and/or base plate) refer to the Viking Pump
product catalog.

DO NOT attempt to dismantle a pressure relief valve
that has not had the spring pressure relieved or is
mounted on a pump that is operating.

AVOID contact with hot areas of the pump and/or
drive. Certain operating conditions, temperature
control devices (jackets, heat-tracing, etc.), improper
installation, improper operation, and improper
maintenance can all cause high temperatures on the
pump and/or drive.

THE PUMP must be provided with pressure protection.
This may be provided through a relief valve mounted
directly on the pump, an in-line pressure relief valve,
a torque limiting device, or a rupture disk. If pump
rotation may be reversed during operation, pressure
protection must be provided on both sides of pump.
Relief valve adjusting screw caps must always point
towards suction side of the pump. If pump rotation is
reversed, position of the relief valve must be changed.
Pressure relief valves cannot be used to control pump
flow or regulate discharge pressure. For additional
information, refer to Viking Pump’s Technical Service
Manual TSM 000 and Engineering Service Bulletin
ESB-31.

THE PUMP must be installed in a matter that allows
safe access for routine maintenance and for inspection
during operation to check for leakage and monitor
pump operation.

SECTION TSM 320.1 ISSUE E PAGE 2 OF 7

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.

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.

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.

SECTION TSM 320.1 ISSUE E PAGE 3 OF 7