Gorman-Rupp Pumps 82D1-GX160 1257391 and up - Manual (Page 24)

OM−05297 80 SERIES
MAINTENANCE & REPAIR PAGE E − 7
gage the hardware (15, 16, 18 and 19) and pull the
wear plate from the pump casing.
Impeller Removal
(Figure 2)
To loosen the impeller (2), tap the vanes of the im-
peller in a counterclockwise direction (when facing
the impeller) with a block of wood or a soft-faced
mallet. Be careful not to damage the impeller
vanes. 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. Remove the impeller adjusting shims
(4) from the shaft. Tie and tag the shims or measure
and record their thickness for ease of reassembly.
Seal Removal and Disassembly
(Figures 2 and 3)
Remove the spring retainer (5) and seal spring.
Slide shaft sleeve (6) and rotating portion of the
seal off the shaft as a unit. Apply oil to the sleeve
and work it under the bellows. Slide the rotating
portion of the seal off the sleeve.
To remove the stationary seat, remove the hard-
ware (9 and 10), and slide the stationary portion of
the seal and intermediate (8) off the shaft as a unit.
Position the intermediate on a flat surface with the
impeller side down. Use thumb pressure to press
the stationary seat from the intermediate.
If no further disassembly is required, see Seal
Reassembly and Installation.
Seal Reassembly and Installation
(Figures 2 and 3)
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.
Inspect the engine 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 (refer to the engine service
manual).
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. Clean and polish the shaft sleeve, or replace it
if there are nicks or cuts on either end. If any com-
ponents 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 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 2).