OM-01171
0 SERIES
MAINTENANCE & REPAIR
PAGE E - 5
prohibit smoking, wear static‐resistant
clothing and shoes. Clean up all fuel
spills immediately after occurrence.
Use
Only Genuine Gorman-Rupp
re
placement parts. Failure to do so may cre
ate a hazard and damage the pump or di
minish optimal pump performance. Any
such hazard, damage or diminished per
formance is not covered by the warranty.
NOTE
When appropriate recycling facilities are available,
the user should recycle components and fluids
when doing any routine maintenance / repairs and
also at the end of the pump’s useful life. All other
components and fluids shall be disposed of ac
cording to all applicable codes and regulations.
Pump Disassembly
Before attempting to service the pump, remove the
pump casing drain plug (17) and drain the pump.
Clean and reinstall the drain plug.
To service the impeller (9), seal assembly (7), or va
ne plate (11), the pump housing (1) must be sepa
rated from the intermediate (2).
Remove the suction and discharge lines. Remove
the nuts (6) and use a suitable hoist and sling to
separate the pump casing and gasket (15) from
the intermediate. Remove the vane plate O‐ring
(14).
Impeller Removal
For access to the impeller (9), disengage the
screws (12 and 13) and remove the vane plate (11).
Immobilize the impeller by inserting a bar between
the impeller vanes, being careful not to damage
the vanes. Disengage the impeller nut (10).
Immobilize the motor shaft by inserting a large flat
head screwdriver into the slot in the end of the shaft
in the front end of the motor.
Unscrew the impeller from the shaft. Use caution
when removing the impeller; tension on the seal
spring will be released as the impeller is removed.
Remove the impeller adjusting shims (8). Tie and
tag the shims or measure and record their thick
ness for ease of reassembly.
Seal Removal and Disassembly
Remove the spring retainer and spring. Apply oil to
the shaft and work it up under the rubber bellows.
Slide the rotating portion of the seal off the shaft.
Remove the hardware (5 and 6) securing the inter
mediate (2) to the motor (3). Slide the intermediate
off the shaft and use a suitably sized dowel to press
the seal stationary element and seat out of the in
termediate from the back side.
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 ven
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain
ers.
The seal is not normally reused because wear pat
terns 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 leak
