Gorman-Rupp Pumps UNIT 608 1347755 thru 1395613 - Manual (Page 34)

UNIT SERIES OM−01228
MAINTENANCE & REPAIR PAGE E − 14
Clean the adhesive sealant from the faces of the
vane plate and the intermediate. Remove the vane
plate O-ring (19).
Insert a large flat head screwdriver in the slot in the
end of the shaft of the motor (22, Figure 1) to pre-
vent shaft rotation and remove the impeller nut
(18).
Insert a soft metal bar between the vanes of the im-
peller and use the bar to unscrew the impeller from
the motor shaft in a counterclockwise direction.
Use caution not to damage the impeller vanes.
Use caution when removing the impeller; tension
on the seal spring will be released as the impeller is
removed.
Remove the impeller adjusting shims (14). Tie and
tag the shims or measure and record their thick-
ness for ease of reassembly.
Seal Removal and Disassembly
(Figure 2)
Remove the seal spring. Apply oil to the shaft and
work it up under the rubber bellows. Slide the rotat-
ing portion of the seal off the shaft.
Remove the hardware (12 and 13) securing the in-
termediate bracket (6) to the motor, and slide the
intermediate bracket and stationary seal compo-
nents off the shaft as a unit. 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
(Figure 2)
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 7).