Gorman-Rupp Pumps 16A22-B User Manual

CD

OM-00711-OB04

September 16, 1994

INSTALLATION, OPERATION,

AND MAINTENANCE MANUAL

WITH PARTS LIST

10 SERIES PUMPS

MODEL

16A22−B

THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA Printed in U.S.A.

eCopyright by the Gorman-Rupp Company

TABLE OF CONTENTS

INTRODUCTION PAGE I − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY - SECTION A PAGE A − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION − SECTION B PAGE B − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Dimensions PAGE B − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PREINSTALLATION INSPECTION PAGE B − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

POSITIONING PUMP PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lifting PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mounting PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clearance PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SUCTION AND DISCHARGE PIPING PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Materials PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Line Configuration PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connections to Pump PAGE B − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gauges PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SUCTION LINES PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fittings PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strainers PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sealing PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Suction Lines In Sumps PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Suction Line Positioning PAGE B − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DISCHARGE LINES PAGE B − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Siphoning PAGE B − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Valves PAGE B − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bypass Lines PAGE B − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AUTOMATIC AIR RELEASE VALVE PAGE B − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Theory of Operation PAGE B − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Release Valve Installation PAGE B − 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ALIGNMENT PAGE B − 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Coupled Drives PAGE B − 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

V−Belt Drives PAGE B − 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATION − SECTION C PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PRIMING PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rotation PAGE C − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATION PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lines With a Bypass PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lines Without a Bypass PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Leakage PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Liquid Temperature And Overheating PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strainer Check PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Vacuum Check PAGE C − 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STOPPING PAGE C − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cold Weather Preservation PAGE C − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BEARING TEMPERATURE CHECK PAGE C − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING − SECTION D PAGE D − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

i

TABLE OF CONTENTS

(continued)

PUMP MAINTENANCE AND REPAIR - SECTION E PAGE E − 1. . . . . . . . . . . . . . . . .

STANDARD PERFORMANCE CURVE PAGE E − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PARTS LIST:

Pump Model PAGE E − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY PAGE E − 4. . . . . . . . . . . . . . . . . . . . . . . . .

Suction Check Valve Removal and Disassembly PAGE E − 4. . . . . . . . . . . . . . . . . . . . . . . . . . .

Back Cover Removal PAGE E − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Casing Removal PAGE E − 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Impeller Removal PAGE E − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seal Removal and Disassembly PAGE E − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shaft and Bearing Removal and Disassembly PAGE E − 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shaft and Bearing Reassembly and Installation PAGE E − 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seal Reassembly and Installation PAGE E − 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Impeller Installation And Adjustment PAGE E − 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pump Casing Installation PAGE E − 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Back Cover Installation PAGE E − 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Suction Check Valve Installation PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Final Pump Assembly PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LUBRICATION PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Seal Assembly PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bearings PAGE E − 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Source PAGE E − 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ii

10 SERIES

OM−00711−04

INTRODUCTION

This Installation, Operation, and Maintenance
manual is designed to help you achieve the best
performance and longest life from your Gorman­Rupp pump.

This pump is a 10 Series, semi-open impeller, self­priming centrifugal model with a suction check
valve. The pump is designed for handling corrosive
liquids containing specified entrained solids, resi­dues and slurries. The basic material of construc-

The Gorman-Rupp Company or Gorman-Rupp of Canada Limited
P.O. Box 1217 70 Burwell Road
Mansfield, Ohio 44901-1217 St. Thomas, Ontario N5P 3R7

The following are used to alert maintenance personnel to procedures which require special attention, to
those which could damage equipment, and to those which could be dangerous to personnel:

tion for wetted parts is type 316 stainless steel.

for information or technical assistance on the pow­er source, contact the power source manufactur­er’s local dealer or representative.

If there are any questions regarding the pump or
its application which are not covered in this man­ual or in other literature accompanying this unit,
please contact your Gorman-Rupp distributor, or
write:

Immediate hazards which WILL result in
severe personal injury or death. These
instructions describe the procedure re­quired and the injury which will result
from failure to follow the procedure.

Hazards or unsafe practices which
COULD result in severe personal injury
or death. These instructions describe
the procedure required and the injury
which could result from failure to follow
the procedure.

Hazards or unsafe practices which COULD
result in minor personal injury or product
or property damage. These instructions
describe the requirements and the possi­ble damage which could result from failure
to follow the procedure.

NOTE

Instructions to aid in installation, operation, and
maintenance or which clarify a procedure.

PAGE I − 1INTRODUCTION

10 SERIES

SAFETY - SECTION A

This information applies to 10 Series ba­sic pumps. Gorman-Rupp has no con­trol over or particular knowledge of the
power source which will be used. Refer
to the manual accompanying the power
source before attempting to begin oper­ation.

OM−00711−04

After the pump has been installed, make
certain that the pump and all piping or
hose connections are tight, properly
supported and secure before operation.

Before attempting to open or service the
pump:

1. Familiarize yourself with this man­ual.

2. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.

3. Allow the pump to completely cool
if overheated.

4. Check the temperature before
opening any covers, plates, or
plugs.

5. Close the suction and discharge
valves.

6. Vent the pump slowly and cau­tiously.

7. Drain the pump.

Do not operate the pump against a
closed discharge valve for long periods
of time. If operated against a closed dis­charge valve, pump components will
deteriorate, and the liquid could come
to a boil, build pressure, and cause the
pump casing to rupture or explode.

Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over­heated pump. Vapor pressure within the
pump can cause parts being disen­gaged to be ejected with great force. Al­low the pump to cool before servicing.

This pump is designed to handle corro-
sive liquids containing specified en­trained solids, residues and slurries. Do
not attempt to pump volatile or flam­mable liquids which may damage the
pump or endanger personnel as a result
of pump failure.

This pump is designed to pump materi­als which could cause serious illness or
injury through direct exposure or
emitted fumes. Wear protective cloth­ing, such as rubber gloves, face mask,
and rubber apron, as necessary before
disassembling the pump or piping.

PAGE A − 1SAFETY

10 SERIESOM−00711−04

Overheating may produce dangerous
fumes. Use extreme caution when vent­ing the pump, or when removing covers,
plates, plugs, or fittings.

Do not operate the pump without
shields and/or guards in place over the
drive shafts, belts, and/or couplings, or
other rotating parts. Exposed rotating
parts can catch clothing, fingers, or
tools, causing severe injury to person­nel.

Never run this pump backwards. Be cer­tain that rotation is correct before fully
engaging the pump.

PAGE A − 2 SAFETY

10 SERIES OM−00711−04

INSTALLATION − SECTION B

Review all SAFETY information in Section A.

Since pump installations are seldom identical, this
section offers only general recommendations and
practices required to inspect, position, and ar­range the pump and piping.

Most of the information pertains to a standard
static lift application where the pump is positioned
above the free level of liquid to be pumped.

If installed in a flooded suction application where
the liquid is supplied to the pump under pressure,
some of the information such as mounting, line
configuration, and priming must be tailored to the

OUTLINE DRAWING

specific application. Since the pressure supplied
to the pump is critical to performance and safety,
be sure to limit the incoming pressure to 50% of the
maximum permissible operating pressure as
shown on the pump performance curve (see Sec­tion E, Page 1).

For further assistance, contact your Gorman-Rupp
distributor or the Gorman-Rupp Company.

Pump Dimensions

See Figure B−1 for the approximate physical di­mensions of this pump.

Figure B−1. Pump Model 16A22−B

PREINSTALLATION INSPECTION

The pump assembly was inspected and tested be­fore shipment from the factory. Before installation,
inspect the pump for damage which may have oc­curred during shipment. Check as follows:

a. Inspect the pump for cracks, dents, damaged

threads, and other obvious damage.

b. Check for and tighten loose attaching hard-

ware. Since gaskets tend to shrink after dry­ing, check for loose hardware at mating sur­faces.

PAGE B − 1INSTALLATION

OM−00711−04 10 SERIES

c. Carefully read all tags, decals, and markings

on the pump assembly, and perform all duties
indicated. Note that the pump shaft rotates in
the required direction.

Only operate this pump in the direction in­dicated by the arrow on the pump body
and on the accompanying decal. Other­wise, the impeller could become loosened
from the shaft and seriously damage the
pump.

d. Check levels and lubricate as necessary. Re-

fer to LUBRICATION in the MAINTENANCE
AND REPAIR section of this manual and per­form duties as instructed.

e. If the pump has been stored for more than 12

months, some of the components or lubri­cants may have exceeded their maximum
shelf life. These must be inspected or re-
placed to ensure maximum pump service.

damaged if the chains or cables used to lift
and move the unit are improperly wrapped
around the pump.

Mounting

Locate the pump in an accessible place as close as
practical to the liquid being pumped. Level mount­ing is essential for proper operation.

The pump may have to be supported or shimmed
to provide for level operation or to eliminate vibra­tion.

Clearance

A minimum clearance of 18 inches in front of the
cover plate is required to permit removal of the cov­er and easy access to the pump interior.

SUCTION AND DISCHARGE PIPING

Pump performance is adversely effected by in­creased suction lift, discharge elevation, and fric­tion losses. See the performance curve on Page
E-1 to be sure your overall application allows pump
to operate within the safe operation range.

If the maximum shelf life has been exceeded, or if
anything appears to be abnormal, contact your
Gorman-Rupp distributor or the factory to deter­mine the repair or updating policy. Do not put the
pump into service until appropriate action has
been taken.

POSITIONING PUMP

Lifting

Use lifting equipment with a capacity of at least
3550 pounds (1610 kg). This pump weighs ap­proximately 706 pounds (320 kg), not including
the weight of accessories, base and power source.
Customer installed equipment such as suction and
discharge piping must be removed before at­tempting to lift.

The pump assembly can be seriously

Materials

Either pipe or hose maybe used for suction and
discharge lines; however, the materials must be
compatible with the liquid being pumped. If hose is
used in suction lines, it must be the rigid-wall, rein­forced type to prevent collapse under suction. Us­ing piping couplings in suction lines is not recom­mended.

Line Configuration

Keep suction and discharge lines as straight as
possible to minimize friction losses. Make mini­mum use of elbows and fittings, which substan­tially increase friction loss. If elbows are necessary,
use the long-radius type to minimize friction loss.

Connections to Pump

Before tightening a connecting flange, align it ex­actly with the pump port. Never pull a pipe line into
place by tightening the flange bolts and/or cou­plings.

PAGE B − 2 INSTALLATION

10 SERIES OM−00711−04

Lines near the pump must be independently sup­ported to avoid strain on the pump which could
cause excessive vibration, decreased bearing life,
and increased shaft and seal wear. If hose-type
lines are used, they should have adequate support
to secure them when filled with liquid and under
pressure.

Gauges

Most pumps are drilled and tapped for installing
discharge pressure and vacuum suction gauges. If
these gauges are desired for pumps that are not
tapped, drill and tap the suction and discharge
lines not less than 18 inches (457,2 mm) from the
suction and discharge ports and install the lines.
Installation closer to the pump may result in erratic
readings.

SUCTION LINES

To avoid air pockets which could affect pump prim­ing, the suction line must be as short and direct as
possible. When operation involves a suction lift, the
line must always slope upward to the pump from
the source of the liquid being pumped; if the line
slopes down to the pump at any point along the
suction run, air pockets will be created.

Fittings

three or four times the cross section of the suction
line, and that the openings will not permit passage
of solids larger than the solids handling capability
of the pump.

This pump is designed to handle up to 2 1/2 inch
(63,5 mm) diameter spherical solids.

Sealing

Since even a slight leak will affect priming, head,
and capacity, especially when operating with a
high suction lift, all connections in the suction line
should be sealed with pipe dope to ensure an air­tight seal. Follow the sealant manufacturer’s rec­ommendations when selecting and applying the
pipe dope. The pipe dope should be compatible
with the liquid being pumped.

Suction Lines In Sumps

If a single suction line is installed in a sump, it
should be positioned away from the wall of the
sump at a distance equal to 1-1/2 times the diame­ter of the suction line.

If there is a liquid flow from an open pipe into the
sump, the flow should be kept away from the suc­tion inlet because the inflow will carry air down into
the sump, and air entering the suction line will re­duce pump efficiency.

Suction lines should be the same size as the pump
inlet. If reducers are used in suction lines, they
should be the eccentric type, and should be in­stalled with the flat part of the reducers uppermost
to avoid creating air pockets. Valves are not nor­mally used in suction lines, but if a valve is used,
install it with the stem horizontal to avoid air pock­ets.

Strainers

If a strainer is furnished with the pump, be certain
to use it; any spherical solids which pass through a
strainer furnished with the pump will also pass
through the pump itself.

If a strainer is not furnished with the pump, but is
installed by the pump user, make certain that the
total area of the openings in the strainer is at least

If it is necessary to position inflow close to the suc­tion inlet, install a baffle between the inflow and the
suction inlet at a distance 1-1/2 times the diameter
of the suction pipe. The baffle will allow entrained
air to escape from the liquid before it is drawn into
the suction inlet.

If two suction lines are installed in a single sump,
the flow paths may interact, reducing the efficiency
of one or both pumps. To avoid this, position the
suction inlets so that they are separated by a dis­tance equal to at least 3 times the diameter of the
suction pipe.

Suction Line Positioning

The depth of submergence of the suction line is
critical to efficient pump operation. Figure B−2
shows recommended minimum submergence vs.

velocity.

PAGE B − 3INSTALLATION

OM−00711−04 10 SERIES

NOTE

The pipe submergence required may be reduced
by installing a standard pipe increaser fitting at the
end of the suction line. The larger opening size will

reduce the inlet velocity. Calculate the required
submergence using the following formula based
on the increased opening size (area or diameter).

Figure B−2. Recommended Minimum Suction Line Submergence vs. Velocity

DISCHARGE LINES

Siphoning

Do not terminate the discharge line at a level lower
than that of the liquid being pumped unless a si­phon breaker is used in the line. Otherwise, a si­phoning action causing damage to the pump
could result.

Valves

If a throttling valve is desired in the discharge line,
use a valve as large as the largest pipe to minimize
friction losses. Never install a throttling valve in a
suction line.

A check valve in the discharge line is normally rec­ommended, but it is not necessary in low dis­charge head applications.

With high discharge heads, it is recommended that
a throttling valve and a system check valve be in­stalled in the discharge line to protect the pump
from excessive shock pressure and reverse rota­tion when it is stopped.

If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.

Bypass Lines

Self-priming pumps are not air compressors. Dur­ing the priming cycle, air from the suction line must
be vented to atmosphere on the discharge side. If
the discharge line is open, this air will be vented
through the discharge. However, if a check valve
has been installed in the discharge line, the dis­charge side of the pump must be opened to atmos­pheric pressure through a bypass line installed be-

PAGE B − 4 INSTALLATION

10 SERIES OM−00711−04

tween the pump discharge and the check valve. A
self-priming centrifugal pump will not prime if
there is sufficient static liquid head to hold the dis­charge check valve closed.

Except in certain specific applications (to

NOTE

The bypass line should be sized so that it does not
affect pump discharge capacity; however, the by­pass line should be at least 1 inch (25,4 mm) in di­ameter to minimize the chance of plugging.

prevent flooding during service of an auto­matic air release valve in a below-ground
lift station), if a manual shut-off valve is in­stalled anywhere in a bypass line, it must
be a full-opening, ball-type valve to pre-
vent plugging by solids.

In low discharge head applications (less than 30
feet (9,1 m)), it is recommended that the bypass
line be run back to the wet well, and located 6
inches below the water level or cut-off point of the
low level pump. In some installations, this bypass
outline may be terminated with a six-to-eight foot
(1,8 to 2,4 m) length of 1-1/4 inch (31,8 mm) I.D.
smooth-bore hose; air and liquid vented during
the priming process will then agitate the hose and
break up any solids, grease, or other substances
likely to cause clogging.

A manual shut-off valve should not be
installed in any bypass line. A manual
shut-off valve may inadvertently be left
closed during operation. A pump which
has lost prime may continue to operate
without reaching prime, causing dan­gerous overheating and possible explo­sive rupture of the pump casing. Per­sonnel could be severely injured.

A bypass line that is returned to a wet well
must be secured against being drawn into
the pump suction inlet.

It is also recommended that pipe unions be in­stalled at each 90_ elbow in a bypass line to ease
disassembly and maintenance.

In high discharge head applications (more than
30 feet (9,1 m), an excessive amount of liquid may
be bypassed and forced back to the wet well under
the full working pressure of the pump; this will re­duce overall pumping efficiency. Therefore, it is

recommended that a Gorman-Rupp Automatic
Air Release Valve be installed in the bypass line.

Gorman-Rupp Automatic Air Release Valves are
reliable, and require minimum maintenance. See
Automatic Air Release Valves in this section for
installation and theory of operation of the Auto­matic Air Release Valve. Consult your Gorman­Rupp distributor, or contact the Gorman-Rupp
Company for selection of an Automatic Air Release
Valve to fit your application.

Allow an over-heated pump to cool be­fore servicing. Do not remove plates,
covers, gauges, or fittings from an over­heated pump. Liquid within the pump
can reach boiling temperatures, and va­por pressure within the pump can cause
parts being disengaged to be ejected
with great force. After the pump cools,
drain the liquid from the pump by re­moving the casing drain plug. Use cau­tion when removing the plug to prevent
injury to personnel from hot liquid.

AUTOMATIC AIR RELEASE VALVE

When properly installed and correctly adjusted to
the specific hydraulic operating conditions of the
application, the Gorman-Rupp Automatic Air Re­lease Valve will permit air to escape through the by­pass line, and then close automatically when the
pump is fully primed and pumping at full capacity.

PAGE B − 5INSTALLATION

OM−00711−04 10 SERIES

Theory of Operation

Figures B−3 and B−4 show a cross-sectional view
of the Automatic Air Release Valve, and a corre­sponding description of operation.

Some leakage (1 to 5 gallons (3,8 to 18,9
Liters) per minute) will occur when the
valve is fully closed. Be sure the bypass
line is directed back to the wet well or
tank to prevent hazardous spills.

When the pump shuts down, the spring returns the
diaphragm to its original position. Any solids that
may have accumulated in the diaphragm chamber
settle to the bottom and are flushed out during the
next priming cycle.

NOTE

Figure B−3. Valve in Open Position

During the priming cycle, air from the pump casing
flows through the bypass line, and passes through
the Air Release Valve to the wet well (Figure B−3).

The valve will remain open if the pump does not
reach its designed capacity or head. Valve closing
pressure is dependent upon the discharge head of
the pump at full capacity. The range of the valve
closing pressure is established by the tension rate
of the spring as ordered from the factory. Valve clos­ing pressure can be further adjusted to the exact
system requirements by moving the spring retain­ing pin up or down the plunger rod to increase or
decrease tension on the spring. Contact your Gor­man-Rupp distributor or the Gorman-Rupp Com­pany for information about an Automatic Air Re­lease Valve for your specific application.

Air Release Valve Installation

The Automatic Air Release Valve must be inde-

Figure B−4. Valve in Closed Position

When the pump is fully primed, pressure resulting
from flow against the valve diaphragm com­presses the spring and closes the valve (Figure
B−4). The valve will remain closed, reducing the
bypass of liquid to 1 to 5 gallons per minute, until
the pump loses its prime or stops.

PAGE B − 6 INSTALLATION

pendently mounted in a horizontal position and
connected to the discharge line of the self-priming
centrifugal pump (see Figure B−5).

NOTE

If the Air Release Valve is to be installed on a staged
pump application, contact the factory for specific
installation instructions.

10 SERIES OM−00711−04

INSTALL AIR RELEASE VALVE
IN HORIZONTAL POSITION

90_ LONG

RADIUS
ELBOW

BLEED LINE 1"
(25,4 MM) DIA. MIN.
(CUSTOMER FUR­NISHED) EXTEND 6"
(152 MM) BELOW
PUMP OFF LIQUID
LEVEL

SUPPORT
BRACKET

CLEAN-OUT
COVER

SUCTION
LINE

WET WELL
OR SUMP

DISCHARGE PIPE

DISCHARGE
CHECK VALVE

PUMP DISCHARGE

SELF-PRIMING
CENTRIFUGAL

PUMP

Figure B−5. Typical Automatic Air Release Valve Installation

The valve inlet line must be installed between the
pump discharge port and the non-pressurized side
of the discharge check valve. The valve inlet is at
the large end of the valve body, and is provided
with standard 1 inch NPT pipe threads.

The valve outlet is located at the opposite end of
the valve, and is also equipped with standard 1
inch NPT pipe threads. The outlet should be con­nected to a bleed line which slopes back to the wet
well or sump. The bleed line must be the same size
as the inlet piping, or larger. If piping is used for the
bleed line, avoid the use of elbows whenever pos­sible.

NOTE

It is recommended that each Air Release Valve be
fitted with an independent bleeder line directed
back to the wet well. However, if multiple Air Re­lease Valves are installed in a system, the bleeder
lines may be directed to a common manifold pipe.
Contact your Gorman-Rupp distributor or the Gor­man-Rupp Company for information about installa­tion of an Automatic Air Release Valve for your spe­cific application.

ALIGNMENT

The alignment of the pump and its power source is
critical for trouble-free mechanical operation. In
either a flexible coupling or V-belt driven system,
the driver and pump must be mounted so that their
shafts are aligned with and parallel to each other. It
is imperative that alignment be checked after the
pump and piping are installed, and before opera­tion.

NOTE

Check Rotation, Section C, before final alignment
of the pump.

When mounted at the Gorman-Rupp factory, driver
and pump are aligned before shipment. Misalign­ment will occur in transit and handling. Pumps
must be checked and realigned before operation.
Before checking alignment, tighten the foundation
bolts. The pump casing feet and/or pedestal feet,
and the driver mounting bolts should also be tightly
secured.

PAGE B − 7INSTALLATION

OM−00711−04 10 SERIES

When checking alignment, disconnect
the power source to ensure that the
pump will remain inoperative.

Adjusting the alignment in one direction
may alter the alignment in another direc­tion. Check each procedure after altering
alignment.

Coupled Drives

When using couplings, the axis of the power
source must be aligned to the axis of the pump
shaft in both the horizontal and vertical planes.
Most couplings require a specific gap or clearance
between the driving and the driven shafts. Refer to
the coupling manufacturer’s service literature.

Align spider insert type couplings by using calipers
to measure the dimensions on the circumference
of the outer ends of the coupling hub every 90_.
The coupling is in alignment when the hub ends
are the same distance apart at all points (see Fig­ure B−6).

Figure B−7. Alignment of V-Belt Driven

Pumps

Check parallel adjustment by laying a straightedge
across both coupling rims at the top, bottom, and
side. When the straightedge rests evenly on both
halves of the coupling, the coupling is in horizontal
parallel alignment. If the coupling is misaligned,
use a feeler gauge between the coupling and the
straightedge to measure the amount of misalign­ment.

V-Belt Drives

When using V-belt drives, the power source and
the pump must be parallel. Use a straightedge
along the sides of the pulleys to ensure that the pul­leys are properly aligned (see Figure B−8). In drive
systems using two or more belts, make certain that
the belts are a matched set; unmatched sets will
cause accelerated belt wear.

Figure B−6. Alignment of V-Belt Driven

Pumps

Align non-spider type couplings by using a feeler
gauge or taper gauge between the coupling halves
every 90_. The coupling is in alignment when the
hubs are the same distance apart at all points (see
Figure B−7).

MISALIGNED:

SHAFTS

NOT PARALLEL

MISALIGNED:

SHAFTS

NOT IN LINE

ALIGNED: SHAFTS

PARALLEL AND

SHEAVES IN LINE

Figure B−8. Alignment of V-Belt Driven

Pumps

Tighten the belts in accordance with the belt manu­facturer’s instructions. If the belts are too loose,

PAGE B − 8 INSTALLATION

10 SERIES OM−00711−04

they will slip; if the belts are too tight, there will be
excessive power loss and possible bearing failure.
Select pulleys that will match the proper speed ra­tio; overspeeding the pump may damage both
pump and power source.

Do not operate the pump without the
guard in place over the rotating parts.
Exposed rotating parts can catch cloth­ing, fingers, or tools, causing severe in­jury to personnel.

PAGE B − 9INSTALLATION

10 SERIES

OM−00711−04

OPERATION − SECTION C

Review all SAFETY information in Section A.

Follow the instructions on all tags, labels and
decals attached to the pump.

This pump is designed to handle corro­sive liquids containing specified en­trained solids, residues and slurries. Do
not attempt to pump volatile, or flam­mable liquids which may damage the
pump or endanger personnel as a result
of pump failure.

Pump speed and operating condition
points must be within the continuous per­formance range shown on the curve (see
Section E, Page 1).

PRIMING

not prime when dry. Extended operation of
a dry pump will destroy the seal assembly.

Add liquid to the pump casing when:

1. The pump is being put into service for the
first time.

2. The pump has not been used for a consider­able length of time.

3. The liquid in the pump casing has evapo­rated.

Once the pump casing has been filled, the pump
will prime and reprime as necessary.

After filling the pump casing, reinstall
and tighten the fill plug. Do not attempt
to operate the pump unless all connect­ing piping is securely installed. Other­wise, liquid in the pump forced out un­der pressure could cause injury to per­sonnel.

To fill the pump, remove the pump casing fill cover
or fill plug in the top of the casing, and add clean
liquid until the casing is filled. Replace the fill cover
or fill plug before operating the pump.

Install the pump and piping as described in IN-
STALLATION. Make sure that the piping connec­tions are tight, and that the pump is securely
mounted. Check that the pump is properly lubri­cated (see LUBRICATION in MAINTENANCE
AND REPAIR).

This pump is self-priming, but the pump should
never be operated unless there is liquid in the
pump casing.

STARTING

Consult the operations manual furnished with the
power source.

Rotation

The correct direction of pump rotation is indicated
by an arrow on the pump body or accompanying
decals. If the pump is operated in the wrong direc­tion, the impeller could become loosened from the
shaft and seriously damage the pump.

Never operate this pump unless there is
liquid in the pump casing. The pump will

OPERATION PAGE C − 1

The pump must operate in the direction in-

OM−00711−04 10 SERIES

dicated by the arrow on the pump, or ac­companying decals. Reverse rotation
could loosen the impeller and seriously
damage the pump.

Consult the operating manual furnished with the
pump power source before attempting to start the
power source.

If an electric motor is used to drive the pump, re­move V-belts, couplings, or otherwise disconnect
the pump from the motor before checking motor
rotation. Operate the motor independently while
observing the direction of the motor shaft, or cool­ing fan.

If rotation is incorrect on a three-phase motor, have
a qualified electrician interchange any two of the
three phase wires to change direction. If rotation is
incorrect on a single-phase motor, consult the lit­erature supplied with the motor for specific instruc­tions.

OPERATION

Lines With a Bypass

slowly and guard against excessive shock pres­sure which could damage pipe ends, gaskets,
sprinkler heads, and any other fixtures connected
to the line. When the discharge line is completely
filled, adjust the throttling valve to the required flow
rate.

Leakage

No leakage should be visible at pump mating sur­faces, or at pump connections or fittings. Keep all
line connections and fittings tight to maintain maxi­mum pump efficiency.

Liquid Temperature And Overheating

The maximum liquid temperature for this pump is
160_ F (71_C). Do not apply it at a higher operating
temperature.

Overheating can occur if operated with the valves
in the suction or discharge lines closed. Operating
against closed valves could bring the liquid to a
boil, build pressure, and cause the pump to rup­ture or explode. If overheating occurs, stop the
pump and allow it to cool before servicing it. Refill
the pump casing with cool liquid.

If a Gorman-Rupp Automatic Air Release Valve has
been installed, the valve will automatically open to
allow the pump to prime, and automatically close
after priming is complete (see INSTALLATION for
Air Release Valve operation).

If the bypass line is open, air from the suction line
will be discharged through the bypass line back to
the wet well during the priming cycle. Liquid will
then continue to circulate through the bypass line
while the pump is in operation.

Lines Without a Bypass

Open all valves in the discharge line and start the
power source. Priming is indicated by a positive
reading on the discharge pressure gauge or by a
quieter operation. The pump may not prime imme­diately because the suction line must first fill with
liquid. If the pump fails to prime within five minutes,
stop it and check the suction line for leaks.

After the pump has been primed, partially close the
discharge line throttling valve in order to fill the line

Do not remove plates, covers, gauges,
pipe plugs, or fittings from an over­heated pump. Vapor pressure within the
pump can cause parts being disen­gaged to be ejected with great force. Al­low the pump to cool before servicing.

Strainer Check

If a suction strainer has been shipped with the
pump or installed by the user, check the strainer
regularly, and clean it as necessary. The strainer
should also be checked if pump flow rate begins to
drop. If a vacuum suction gauge has been in­stalled, monitor and record the readings regularly
to detect strainer blockage.

Never introduce air or steam pressure into the
pump casing or piping to remove a blockage. This
could result in personal injury or damage to the

OPERATIONPAGE C − 2

10 SERIES

OM−00711−04

equipment. If backflushing is absolutely neces­sary, liquid pressure must be limited to 50% of the
maximum permissible operating pressure shown
on the pump performance curve (see Section E,
Page 1).

Pump Vacuum Check

With the pump inoperative, install a vacuum gauge
in the system, using pipe dope on the threads.
Block the suction line and start the pump. At oper­ating speed the pump should pull a vacuum of 20
inches (508,0 mm) or more of mercury. If it does
not, check for air leaks in the seal, gasket, or dis­charge valve.

Open the suction line, and read the vacuum gauge
with the pump primed and at operating speed.
Shut off the pump. The vacuum gauge reading will
immediately drop proportionate to static suction
lift, and should then stabilize. If the vacuum reading
falls off rapidly after stabilization, an air leak exists.
Before checking for the source of the leak, check
the point of installation of the vacuum gauge.

Cold Weather Preservation

In below freezing conditions, drain the pump to
prevent damage from freezing. Also, clean out any
solids by flushing with a hose. Operate the pump
for approximately one minute; this will remove any
remaining liquid that could freeze the pump rotat­ing parts. If the pump will be idle for more than a
few hours, or if it has been pumping liquids con­taining a large amount of solids, drain the pump,
and flush it thoroughly with clean water. To prevent
large solids from clogging the drain port and pre­venting the pump from completely draining, insert
a rod or stiff wire in the drain port, and agitate the
liquid during the draining process. Clean out any
remaining solids by flushing with a hose.

BEARING TEMPERATURE CHECK

Bearings normally run at higher than ambient tem­peratures because of heat generated by friction.
Temperatures up to 160_F (71_C) are considered
normal for bearings, and they can operate safely to
at least 180_F (82_C).

STOPPING

Never halt the flow of liquid suddenly. If the liquid
being pumped is stopped abruptly, damaging
shock waves can be transmitted to the pump and
piping system. Close all connecting valves slowly.

If the application involves a high discharge
head, gradually close the discharge
throttling valve before stopping the pump.

After stopping the pump, disconnect the power
source or lock it out to ensure that the pump will re­main inoperative.

Checking bearing temperatures by hand is inaccu­rate. Bearing temperatures can be measured ac­curately by placing a contact-type thermometer
against the housing. Record this temperature for
future reference.

A sudden increase in bearing temperatures is a
warning that the bearings are at the point of failing
to operate properly. Make certain that the bearing
lubricant is of the proper viscosity and at the cor­rect level (see LUBRICATION in Section E). Bear­ing overheating can also be caused by shaft
misalignment and/or excessive vibration.

When pumps are first started, the bearings may
seem to run at temperatures above normal. Con­tinued operation should bring the temperatures
down to normal levels.

OPERATION PAGE C − 3

TROUBLESHOOTING − SECTION D

Review all SAFETY information in Section A.

Before attempting to open or service the
pump:

1. Familiarize yourself with this manual.

2. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.

3. Allow the pump to completely cool if
overheated.

4. Check the temperature before open­ing any covers, plates, or plugs.

5. Close the suction and discharge
valves.

6. Vent the pump slowly and cautiously.

7. Drain the pump.

OM−00711−0410 SERIES

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP FAILS TO
PRIME

PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE

Not enough liquid in cas­ing.

Suction check valve contaminated or
damaged.

Air leak in suction line. Correct leak.

Lining of suction hose collapsed. Replace suction hose.

Leaking or worn seal or pump gasket. Check pump vacuum. Replace

Suction lift or discharge head too high. Check piping installation and install

Strainer clogged. Check strainer and clean if neces-

Air leak in suction line. Correct leak.

Lining of suction hose collapsed. Replace suction hose.

Suction intake not submerged at
proper level or sump too small.

Impeller or other wearing parts worn
or damaged.

Add liquid to casing. See
PRIMING.

Clean or replace check valve.

leaking or worn seal or gasket.

bypass line if needed. See INSTAL-
LATION.

sary.

Check installation and correct
submergence as needed.

Replace worn or damaged parts.
Check that impeller is properly
centered and rotates freely.

TROUBLESHOOTING PAGE D − 1

OM−00711−04 10 SERIES

TROUBLE POSSIBLE CAUSE PROBABLE REMEDY

PUMP STOPS OR
FAILS TO DELIVER
RATED FLOW OR
PRESSURE (cont.)

PUMP REQUIRES
TOO MUCH
POWER

PUMP CLOGS
FREQUENTLY

Leaking or worn seal or pump gasket. Check pump vacuum. Replace

leaking or worn seal or gasket.

Free impeller of debris.Impeller clogged.

Pump speed too slow. Check driver output; check

belts

Pump running back­wards.

Suction lift or discharge head too high. Check piping installation and install

Pump speed too high. Check driver output check that

Discharge head too low.

Discharge flow too slow.

Suction check valve or foot valve
clogged or binding.

or couplings for slippage.

Check direction of rotation and
correct by interchanging any two
motor leads at control box. (See
Pump Rotation, Section C).

bypass line if needed. See INSTAL-
LATION.

sheaves or couplings are correctly
sized.

Adjust discharge
valve.

Dilute if possible.Liquid solution too thick.

Open discharge valve fully to in­crease flow rate, and run power
source at maximum governed
speed.

Clean valve.

EXCESSIVE NOISE Cavitation in pump. Reduce suction lift and/or friction

losses in suction line. Record vac­uum and pressure gauge readings
and consult local representative or
factory.

Locate and eliminate source of air
bubble.

Secure mounting hard­ware.

parts.

Check bearing temperature regular­ly to monitor any increase.

Check for proper type and level of
lubricant.

Check piping installation for proper
support.

Align drive proper­ly.

BEARINGS RUN
TOO HOT

Pumping entrained
air.

Pump or drive not securely mounted.

Impeller clogged or damaged. Clean out debris; replace damaged

Bearing temperature is high, but
within limits.

Low or incorrect lubricant.

Suction and discharge lines not prop­erly supported.

Drive misaligned.

TROUBLESHOOTINGPAGE D − 2

10 SERIES OM−00711−04

PUMP MAINTENANCE AND REPAIR - SECTION E

MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPER­ATING PERFORMANCE.

STANDARD PERFORMANCE FOR PUMP MODEL 16A22−B

Based on 70_ F (21_ C) clear water at sea level

with minimum suction lift. Since pump installations
are seldom identical, your performance may be dif­ferent due to such factors as viscosity, specific

gravity, elevation, temperature, and impeller trim.

Contact the Gorman-Rupp Company to verify per­formance or part numbers.

Pump speed and operating condition

If your pump serial number is followed by an N",
your pump is NOT a standard production model.

MAINTENANCE & REPAIR PAGE E − 1

points must be within the continuous per­formance range shown on the curve.

PARTS PAGE

10 SERIESOM−00711−04

SECTION DRAWING

Figure E−1. Pump Model 16A22−B

MAINTENANCE & REPAIRPAGE E − 2

10 SERIES OM−00711−04

PARTS LIST

Pump Model 16A22−B

(From S/N 1068713 up)

If your pump serial number is followed by an N", your pump is NOT a standard production model. Contact
the Gorman-Rupp Company to verify part numbers.

ITEM

PART NAME PART

NO.

NUMBER

MAT’L
CODE

QTY ITEM

NO.

PART NAME PART

NUMBER

MAT’L
CODE

QTY

1 VOLUTE HOUSING 7748 17070 1
2 IMPELLER 7759B 17070 1
3 SEAL ASSEMBLY 12461B −−−−− 1

4 ACCESSORY PLUG P04 17090 1
5 DISCH FLANGE GSKT 1679G 19410 1

6 HEX HD CAPSCREW B1208 17090 8
7 LOCKWASHER J12 17090 8
8 DISCHARGE FLANGE 1758 17070 1
9 NAME PLATE 38818−023 17010 1

10 DRIVE SCREW BM#04−03 17000 4
11 CASING GSKT SET 34GB 19410 1
12 SEAL PLATE 38272−517 17070 1

13 PIPE COUPLING AE02 15079 1
14 PIPE NIPPLE T02 15079 1
15 AIR VENT S2162 −−−−− 1
16 BOTTLE OILER S1933 −−−−− 1
17 PIPE ELBOW R02 11999 1
18 PIPE NIPPLE T0212 15079 1
19 STREET ELBOW AGS02 11999 1
20 BALL BEARING S1030 −−−−− 1

21 IMPELLER SHAFT 38515−516 1706H 1
22 AIR VENT S1703 −−−−− 1

23 PEDESTAL 3020B 10010 1
24 BALL BEARING S1077 −−−−− 1
25 BEARING SHIM SET 8546 15990 1
26 O−RING 25152−245 −−−−− 1
27 BRG RETAINING RING S1165 −−−−− 1
28 OIL SEAL 25227−534 −−−−− 1
29 SHAFT KEY N0615 15991 1
30 RD HD MACHINE SCREW X#10−01 1/2S 15991

2

31 LOCKWASHER J#10 15991 2
32 BEARING RETAINER 38322−522 26000 1

33 OIL LEVEL SIGHT GAUGE S1471 −−−−− 1
34 PIPE PLUG P12 15079 1
35 PEDESTAL DRAIN PLUG P06 15079 1

36 OIL SEAL 25227−534 −−−−− 1
37 BRG CAP O−RING 25152−248 −−−−− 1

38 BEARING CAP 38322−418 10010 1
39 STUD C0607 15991 6
40 HEX NUT D06 15991 6
41 LOCKWASHER J06 15991 6

42 SLINGER RING 3209 19120 1
43 OIL SEAL S1935 −−−−− 1

44 SEAL DRAIN PLUG P02 17090 1
45 HEX NUT D08 17090 8
46 STUD C0810 17090 8

47 WEAR PLATE ASSY 2545X 17040 1

INDICATES PARTS RECOMMENDED FOR STOCK

Above Serial Numbers Do Not Apply To Pumps Made In Canada.

48 CASING DRAIN PLUG P16 17090 1
49 IMPELLER WASHER 10278 17090 1
50 SOC HD CAPSCREW DM1004S 17090 1
51 COVER PLATE GSKT 7668GB 19410 1
52 COVER PLATE ASSY 42111−933 −−−−− 1
53 −COVER PLATE NOT AVAILABLE 1

54 −DRAIN PLUG P08 17090 1
55 −WARNING PLATE 2613EV 17090 1
56 −DRIVE SCREW BM#04−03 17000 4
57 HEX NUT D08 17090 2
58 LOCKWASHER J08 17090 2
59 CLAMP BAR SCREW 2536 24000 1
60 CLAMP BAR 2547 11010 1

61 CHECK VALVE GSKT 7261GB 19410 1
62 CHECK VALVE SEAT 7261 17070 1

63 SUCTION FLANGE GSKT 1679G 19410 1
64 SUCTION FLANGE 1758 17070 1
65 STUD C1214 17090 8
66 HEX NUT D12 17090 8
67 RD HD MACH SCREW X0404 17090 2
68 CHECK VALVE ASSY 7265F −−−−− 1
69 −HEX HD CAPSCREW B0403 17090 2
70 −LOCKWASHER J04 17090 2
71 −VALVE WEIGHT 7263 17090 1
72 −CHECK VALVE 7264E 19540 1
73 −VALVE WEIGHT 7262 17090 1
74 IMPELLER SHIM SET 5091 17090 REF
75 SHAFT SLEEVE 11907 1706H 1
76 FILL COVER ASSEMBLY 42111−346 −−−−− 1
77 −FILL COVER GSKT 50G 19210 1
78 −COVER PLATE NOT AVAILABLE 1
79 −WARNING PLATE 38816−097 17090 1
80 −DRIVE SCREW BM#04−03 17000 2
81 CLAMP BAR 38111−004 11010 1
82 MACHINE BOLT A1014 17090 2
83 PIPE PLUG P04 17090 1
84 CLAMP BAR SCREW 31912−009 15000 1

NOT SHOWN:

DISCHARGE STICKER 6588BJ −−−−− 1
ROTATION DECAL 2613M −−−−− 1
SUCTION STICKER 6588AG −−−−− 1
PRIMING DECAL 6588AH −−−−− 1
LUBE DECAL 38816−079 −−−−− 1

OPTIONAL:

HI TEMP SHUT−DOWN KITS:

−145_ F 48313−186 −−−−− 1

−130_ F 48313−256 −−−−− 1

−120_ F 48313−257 −−−−− 1

CANADIAN SERIAL NO. .............................. AND UP

MAINTENANCE & REPAIR PAGE E − 3

10 SERIESOM−00711−04

PUMP AND SEAL DISASSEMBLY AND REASSEMBLY

Review all SAFETY information in Section A.

Follow the instructions on all tags, label and de­cals attached to the pump.

This pump requires little service due to its rugged,
minimum-maintenance design. However, if it be­comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional view (see Figure E−1) and the ac­companying parts list.

Before attempting to service the pump, disconnect
or lock out the power source to ensure that the
pump will remain inoperative. Close all valves in the
suction and discharge lines.

Suction Check Valve Removal and Disassem­bly

Before attempting to service the pump, remove the
pump casing drain plug (48) and drain the pump.
Clean and reinstall the drain plug.

To service the suction check valve assembly (68),
remove the suction piping. Remove the nuts (66)
securing the suction flange (64) and suction flange
gasket (63) to the check valve seat (62). Remove
the machine screws (67) securing check valve seat
(62) and check valve assembly (68) to the pump
casing (1). Separate the check valve assembly
from the check valve seat. Discard the suction
flange gasket (63) and check valve gasket (61).

Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(69 and 70), and separate the check valve gasket
(72), and weights (71 and 73).

If no further disassembly is required, see Suction
Check Valve Installation.

For power source disassembly and repair, consult
the literature supplied with the power source, or
contact your local power source representative.

Before attempting to open or service the
pump:

1. Familiarize yourself with this man­ual.

2. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.

3. Allow the pump to completely cool
if overheated.

4. Check the temperature before
opening any covers, plates, or
plugs.

5. Close the suction and discharge
valves.

6. Vent the pump slowly and cau­tiously.

7. Drain the pump.

Back Cover Removal

The wear plate (47) is easily accessible and may be
serviced by removing the back cover assembly
(52). Loosen the clamp bar screw (59) and remove
the clamp bar (60). Pull the back cover and wear
plate from the pump casing. Remove the back cov­er gasket (51). Clean the mating surfaces of the
back cover plate and pump casing.

Inspect the wear plate and replace it if badly scored
or worn. To remove the wear plate, disengage the
hardware (57 and 58) securing it to the back cover.

If no further disassembly is required, see Back

Cover Installation.

Pump Casing Removal

To service the impeller or seal assembly, discon­nect the discharge piping. Remove the hardware
securing the pump to the base. Disconnect the
power source. Tie and tag any leveling shims used
under the pump mounting feet to ease reassembly.

Remove the nuts (45), and using a suitable hoist
and sling of sufficient capacity separate the pump
casing (1) and gasket set (11) from the seal plate

MAINTENANCE & REPAIRPAGE E − 4

OM−00711−0410 SERIES

(12) and pedestal (23). Clean the mating surfaces
of the seal plate and pump casing. Tie and tag the
gaskets, or measure and record their thickness for
ease of reassembly.

Impeller Removal

Before removing the impeller, remove the bottle oil­er and piping (16, 17, 18 and 19). Remove the seal
drain plug (44) and drain the oil from the seal cavity
to prevent the oil from escaping when the impeller
is removed. Clean and reinstall the drain plug.

Immobilize the impeller by wedging a block wood
between the vanes. Remove the impeller caps­crew and washer (49 and 50).

If removed, install the shaft key (29). Install a lathe
dog on the drive end of the shaft (21) with the V"
notch positioned over the shaft keyway.

With the impeller rotation still blocked, strike the
lathe dog sharply in a counterclockwise direction
(when facing the drive end of the shaft). The impel­ler may also be loosened by using a long piece of
heavy bar stock to pry against the arm of the lathe
dog in a counterclockwise direction (when facing
the drive end of the shaft) as shown in Figure 2.
Use caution not to damage the shaft or keyway.
When the impeller breaks loose, remove the lathe
dog and wood block and unscrew the impeller
from the shaft.

Unscrew the impeller from the shaft. Use caution
when removing the impeller; tension on the seal
spring will be released as the impeller is un­screwed.

Inspect the impeller and replace it if cracked or
badly worn. Slide the impeller adjusting shims (74)
off the impeller shaft. Tie and tag the shims or mea­sure and record their thickness for ease of reas­sembly.

Seal Removal and Disassembly

Remove the spring centering washer and seal
spring. Slide the shaft sleeve (75) and rotating por­tion of the seal off the shaft as a single unit. Apply oil
to the sleeve and work it up under the bellows.
Slide the rotating portion of the seal off the shaft
sleeve. Use a stiff wire with a hooked end to re­move the stationary element, seat and O-rings
from the seal plate. Slide the seal plate (12) and oil
seal (43) off the shaft. Use a suitable sized dowel
and press the oil from the seal plate.

NOTE

An alternate method of removing the seal assembly
is to slide the seal plate, shaft sleeve and seal as­sembly off the shaft as a single unit. Place the seal
plate on a flat surface with the impeller side down.
Using a suitable sized dowel, press the seal com­ponents from the seal plate. Press the oil seal from
the seal plate.

Inspect the seal plate and replace it if cracked or
badly worn.

If no further disassembly is required, see Seal

Reassembly and Installation.

Shaft and Bearing Removal and Disassembly

When the pump is properly operated and main­tained, the pedestal should not require disassem­bly. Disassemble the shaft and bearings only
when there is evidence of wear or damage.

Counterclockwise

Lathe Dog Arm

Heavy

Bar Stock

Turn

V" Notch

Shaft Key

Impeller Shaft

Lathe Dog

Setscrew

Shaft and bearing disassembly in the field

Figure 2. Loosening Impeller

MAINTENANCE & REPAIR PAGE E − 5

is not recommended. These operations

10 SERIESOM−00711−04

should be performed only in a properly­equipped shop by qualified personnel.

Remove the pedestal drain plug (35) and drain the
bearing lubricant. Clean and reinstall the drain
plug.

Remove the slinger ring (42).

Using snap ring pliers, remove the bearing retain­ing ring (27) from the pedestal bore.

Remove the machine screws and lockwashers (30
and 31) in the bearing retainer (32). Install two ma­chine screws (#10−32 X 1" long) and using two
screwdrivers against the heads of the machine
screws pry the bearing retainer from the pedestal
bore.

NOTE

Do not use the machine screws to jack against the
ball bearings.

be replaced any time the shaft and bear-
ings are removed.

Clean the pedestal, shaft and all component parts
(except the bearings) with a soft cloth soaked in
cleaning solvent. Inspect the parts for wear or dam­age and replace as necessary.

Most cleaning solvents are toxic and
flammable. Use them only in a well ven­tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain­ers.

Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.

Remove the bearing shim set (25); tie and tag the
shims or measure and record their thickness for
ease of reassembly.

Press the oil seal (28) from the bearing retainer,
and remove the bearing retainer O-ring (26) from
the pedestal bore.

Remove the hardware (40 and 41) and remove the
the bearing cap (38). Press the oil seal (36) from
the bearing cap. Remove the O-ring (37).

Place a block of wood against the drive end of the
shaft and tap the shaft (21) and assembled bear­ings (20 and 24) from the pedestal. Be careful not
to damage the shaft.

After removing the shaft and bearings, clean and
inspect the bearings in place as follows.

Bearings must be kept free of all dirt and
foreign material. Failure to do so will great­ly shorten bearing life. Do not spin dry
bearings. This may scratch the balls or
races and cause premature bearing fail­ure.

Rotate the bearings by hand to check for rough­ness or binding and inspect the bearing balls. If ro­tation is rough or the bearing balls are discolored,
replace the bearings.

The bearing tolerances provide a tight press fit
onto the shaft and a snug slip fit into the pedestal.
Replace the bearings, shaft, or pedestal if the
proper bearing fit is not achieved.

If bearing replacement is required, use a bearing
puller or an arbor (or hydraulic) press to remove
the bearings from the shaft.

To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is

strongly recommended that the bearings

Shaft and Bearing Reassembly and Installa­tion

Clean and inspect the bearings as indicated in

Shaft and Bearing Removal and Disassembly.

MAINTENANCE & REPAIRPAGE E − 6

To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the shaft and bear-
ings are removed.

Inspect the shaft for distortion, nicks or scratches,
or for thread damage on the impeller end. Dress
small nicks and burrs with a fine file or emery cloth.
Replace the shaft if defective.

The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear­ings should never be heated with a direct flame or
directly on a hot plate.

NOTE

If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor-
oughly filtered.

Heat the bearings to a uniform temperature no
higher than 250_F (120_C), and slide the bearings

onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con­tinuous motion, to prevent the bearings from cool­ing and sticking on the shaft.

Use caution when handling hot bear­ings to prevent burns.

After the bearings have been installed and allowed
to cool, check to ensure that they have not moved
away from the shaft shoulders in shrinking. If
movement has occurred, use a suitable sized
sleeve and a press to reposition the bearings
against the shaft shoulders.

If heating the bearings is not practical, use a suit­able sized sleeve and an arbor (or hydraulic) press
to install the bearings on the shaft until fully seated

OM−00711−0410 SERIES

against the shaft shoulders. Position the inboard
bearing on the shaft with the retaining ring facing
toward the impeller end of the shaft.

When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.

Slide the shaft and assembled bearings into the
pedestal until the inboard bearing seats against
the pedestal bore.

When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.

Install the oil seal (36) in the bearing cap (38) with
the lip positioned as shown in Figure 1. Install the
bearing cap O-ring (37) in the bearing cap. Slide
the assembled bearing cap over the shaft and se­cure it to the pedestal (23) with the hardware (40
and 41). Be careful not to damage the oil seal lip.

Apply a light coating of soft grease on the bearing
retainer O-ring (26) and the O-ring groove. Install
the O-ring in the pedestal. Install the same thick­ness of bearing adjusting shim (25) as previously
removed.

Press the outboard oil seal (28) in the bearing re­tainer (32) with the lip positioned as shown in Fig­ure E−1. Press the bearing retainer into the pedes­tal until it seats against the bearing. Be careful not
to damage the oil seal lip on the shaft keyway. Be
sure the machine screws and lockwashers (30 and

31) are fully screwed into the bearing retainer and
are positioned horizontally in line.

Using snap ring pliers, secure the bearing retainer
with the bearing retaining ring (27). Check the shaft
endplay.

NOTE

Shaft endplay should be between .002 and .010
inch (.05 to .25 mm). Add or remove bearing adjust­ing shims to achieve the correct endplay.

MAINTENANCE & REPAIR PAGE E − 7

10 SERIESOM−00711−04

Lubricate the pedestal as indicated in LUBRICA­TION at the end of this section.

Seal Reassembly and Installation

Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.

Most cleaning solvents are toxic and
flammable. Use them only in a well ven­tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain­ers.

Inspect the impeller shaft for damage. Small
scratches or nicks may be removed with a fine file
or emery cloth. If excessive wear exists, the shaft
will have to be replaced.

The seal is not normally reused because wear pat­terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-

gency, carefully wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.

Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision
finished faces; even fingerprints on the faces can
shorten seal life. If necessary, clean the faces with a
non-oil based solvent and a clean, lint-free tissue.
Wipe lightly in a concentric pattern to avoid
scratching the faces.

Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak­age. Clean and polish the shaft sleeve (75), or re­place it if there are nicks or cuts on either end. If any
components are worn, replace the complete seal;
never mix old and new seal parts.

If a replacement seal is being used, remove it from
the container and inspect the precision finished
faces to ensure that they are free of any foreign
matter.

To ease installation of the seal, lubricate the O­rings, bellows and shaft sleeve with water or a very
small amount of oil, and apply a drop of light lubri­cating oil on the finished faces. Assemble the seal
as follows, (see Figure E−3).

MAINTENANCE & REPAIRPAGE E − 8

OM−00711−0410 SERIES

SPRING CENTERING

WASHER

IMPELLER

SHIMS

IMPELLER

SPRING

BELLOWS

DRIVE BAND

RETAINER

ROTATING ELEMENT

SEAL PLATE

O-RINGS

SHAFT

SLEEVE

STATIONARY

SEAL SEAT

IMPELLER

SHAFT

OIL SEAL

STATIONARY

ELEMENT

Figure E−3. 12461B Seal Assembly

This seal is not designed for operation at
temperatures above 160_F (71_C). Do not
use at higher operating temperatures.

Install the slinger ring (42) on the shaft.

Place the seal plate on a flat surface with the impel­ler side up. Press the oil seal (43) into the seal plate
(12) with the lips positioned as shown in Figure
E−1.

Lightly lubricate the stationary seat O-rings with a
small amount of oil. Subassemble the stationary
element in the stationary seat with the chambered
side out. Press the stationary seat into the seal
plate until it bottoms against the seal plate bore. A
push tube cut from a length of plastic pipe would
aid this installation. The I.D. of the pipe should be
approximately the same diameter as the I.D. of the
seal spring.

Slide the seal plate over the shaft until fully seated
against the pedestal (23). Be careful not to dam­age the oil seal lip on the shaft threads.

Align the threaded seal lubricant hole in the seal
plate with the pedestal opening and temporarily
secure the seal plate using two capscrews and
nuts (1/2 UNC X 1-1/2 inch long, not supplied).

Slide the lubricated shaft sleeve (75) onto the shaft
and push it through the stationary seat and oil lip
seal. Be careful not to damage the oil seal lip.
Lightly lubricate the rotating subassembly (con­sisting of the rotating element, retainer and bel­lows) and press it onto the lubricated shaft sleeve.
Continue to push the subassembly until the seal
faces contact. Install the seal spring and the spring
centering washer.

After the impeller has been installed, reinstall the
bottle oiler and piping (16, 17, 18 and 19) and the
air vent and piping (13, 14 and 15) in the seal plate.
Lubricate the seal assembly as indicated in

LUBRICATION.

MAINTENANCE & REPAIR PAGE E − 9

10 SERIESOM−00711−04

Impeller Installation And Adjustment

Inspect the impeller, and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (74) as previously removed. Apply ‘Never­Seez’ or equivalent compound to the shaft threads
and screw the impeller onto the shaft until tight.

A clearance of .020 to .040 inch (0,51 to 1,02 mm)
between the impeller and the seal plate is neces­sary for maximum pump efficiency. Measure this
clearance and add or remove impeller shims until
this clearance is reached.

NOTE

Be sure the seal plate is tight against the pedestal
while measuring this clearance.

Apply a thin coat of ‘Never-Seez’ or equivalent
compound to the threads on the socket head caps­crew (50) and install the capscrew and impeller
washer (49). Torque the impeller capscrew to 90 ft.
lbs. (1080 in. lbs. or 12,4 m. kg.)

After the face clearance has been set, tighten the
nuts (45) securing the pump casing to the pedes­tal.

Back Cover Installation

If the wear plate (47) was removed for replace­ment, secure it to the cover plate (53) using the at­taching hardware (57 and 58). The wear plate must
be concentric to prevent binding when the back
cover is installed.

Clean any scales or debris from the contacting sur­faces on the pump casing that might prevent a
good seal with the back cover. Replace the back
cover gasket (51) and slide the back cover assem­bly (52) into the pump casing. Be sure the wear
plate does not scrape against the impeller.

NOTE

To ease future disassembly, apply a film of grease
or ‘Never-Seez’ on the back cover shoulder, or any
surface that contacts the pump casing. This action
will reduce rust and scale build-up.

Pump Casing Installation

Remove the hardware temporarily securing the
seal plate to the pedestal. Install the same thick­ness of pump casing gaskets (11) as previously re­moved. Using a suitable hoist and sling, secure
the pump casing (1) to the seal plate (12) and ped­estal (23) with the nuts (45). Do not fully tighten the
nuts at this time.

NOTE

It is recommended that the back cover be installed
now. The back cover assembly must be in place to
adjust the impeller face clearance.

A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the wear plate (47) is also
recommended for maximum pump efficiency. Set
this clearance by adding or removing gaskets in
the pump casing gasket set (11) until the impeller
scrapes against the wear plate when the shaft is
turned. After the impeller scrapes, add approxi­mately .008 inch (0,20 mm) of gaskets.

Secure the back cover assembly by installing the
clamp bar (60) and tightening the clamp bar screw
(59). Do not over-tighten the clamp bar screw; it
should be just tight enough to seal the back cover
shoulder.

Suction Check Valve Installation

Inspect the check valve components and replace
as required. Subassemble the check valve weights
(71 and 73) and check valve gasket (72) using the
attaching hardware (69 and 70).

Position the check valve assembly (68) in the
check valve seat (62) with the large weight toward
the inside of the pump casing. Install the check
valve seat gasket (61) and secure the valve seat to
the suction port with the machine screws (67).

NOTE

To ease future disassembly, apply a film of grease in
the valve seat slot for the check valve. This action
will help reduce rust and seizing.

Replace the suction flange gasket (63) and secure
the suction flange (64) with the nuts (66). Check

MAINTENANCE & REPAIRPAGE E − 10

OM−00711−0410 SERIES

the operation of the check valve to ensure proper
seating and free movement.

Final Pump Assembly

Secure the pump to the base with the previously re­moved hardware. Be sure to reinstall any leveling
shims used under the pump mounting feet.

Install the shaft key (29) and secure the pump to
the power source with the previously removed
hardware. Be sure the pump and power source
are securely mounted to the base.

Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure. Open all the
valves in the suction and discharge lines.

Be sure the pump and power source have been
properly lubricated, see LUBRICATION.

Bearings

The pedestal was fully lubricated when shipped
from the factory. Check the oil level regularly
through the sight gauge (33) and maintain it at the
middle of the gauge. When lubrication is required,
add SAE No. 30 non-detergent oil through the hole
for the air vent (22). Do not over-lubricate. Over-lu­brication can cause the bearings to over-heat, re­sulting in premature bearing failure.

NOTE

The white reflector in the sight gauge must be posi­tioned horizontally to provide proper drainage.

Under normal conditions, drain the pedestal once
each year and refill with clean oil to the middle of
the sight gauge. Change the oil more frequently if
the pump is operated continuously or installed in
an environment with rapid temperature change.

Remove the fill cover assembly (76) and fill the
pump casing with clean liquid. Reinstall the fill cov­er and tighten it.

Refer to OPERATION, Section C, before putting
the pump back into service.

LUBRICATION

Seal Assembly

Fill the bottle oiler (16) with SAE No. 30 non-deterg­ent oil while venting the seal cavity at the air vent
(15). Check the oil level regularly and keep the
bottle oiler full.

Monitor the condition of the bearing lubri­cant regularly for evidence of rust or mois­ture condensation. This is especially im­portant in areas where variable hot and
cold temperatures are common.

For cold weather operation, consult the factory or a
lubricant supplier for the recommended grade of
oil.

Power Source

Consult the literature supplied with the power
source, or contact your local power source repre­sentative.

MAINTENANCE & REPAIR PAGE E − 11

For U.S. and International Warranty Information,

Please Visit www.grpumps.com/warranty

or call:

U.S.: 419−755−1280

International: +1−419−755−1352

For Canadian Warranty Information,

Please Visit www.grcanada.com/warranty

or call:

519−631−2870

THE GORMAN-RUPP COMPANY D MANSFIELD, OHIO

GORMAN-RUPP OF CANADA LIMITED D ST. THOMAS, ONTARIO, CANADA