Gorman-Rupp Pumps 02C3-X2 3P 390873 and up - Manual (Page 23)

OM-01098 0 SERIES
MAINTENANCE & REPAIR PAGE E - 5
charge hoses and piping must be re­
moved from the pump before lifting.
Impeller Removal
For access to the impeller (2), disengage the
screws (5) and remove the vane plate (19). Immo­
bilize the impeller by inserting a bar between the
impeller vanes, being careful not to damage the
vanes. Disengage the impeller nut (21).
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 (17). 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 (11 and 12) securing the in­
termediate (9) to the motor (13). Slide the inter­
mediate off the shaft and use a suitably sized dowel
to press the seal stationary element and seat out of
the intermediate 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
age. If any components are worn, replace the com­
plete 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 bel­
lows with water or a very small amount of light lu­
bricating oil, and apply a drop of light lubricating oil
on the finished faces. Assemble the seal as follows
(see Figure 2).