Stanley CO25 Service Manual page 22

12. Remove the seals from the motor-shaft bore in the
bearing housing using Method A or B.
METHOD A:
Remove the retaining ring at the bottom of the bore.
Use the appropriate O-ring service tool to carefully pry the
seal gland out of the bore.
Note:
Do not damage the seal surfaces. Note the seal orienta-
tion.
Remove the O-ring from the outside of the seal gland and
then remove the quad ring from inside the seal gland.
METHOD B:
Insert a rubber-tipped air nozzle in the gear side of the
bore.
Partially install the small end of the motor shaft through the
shaft seal.
Plug the seal vent holes on the face of the bearing housing
and apply air pressure to force the seal gland out and onto
the shaft.
PREPARE PARTS FOR ASSEMBLY
Before the tool can be reassembled, all parts must be
cleaned, inspected, and repaired or replaced as needed.
Remove and discard all seals and O-rings.
CLEANING
1. Clean all parts with degreasing solvent, making sure the
area is well ventilated.
2. Blow the parts dry with compressed air to thoroughly
clean oil passage ways, or wipe with clean, lint-free cloths.
INSPECTION
Inspect all parts for wear or damage; replace as needed.
Parts with special inspection requirements are listed below.
IMPORTANT
The tool parts are carefully machined at the factory
to critical tolerances. Do not attempt to refurbish the
parts.
SERVICE
To determine the extent of wear or damage to any part,
compare the surface to the examples in the Stanley Refur-
bishing Guide (P/N 28431). The kit includes a surface-fi nish
comparator and instructions for refurbishing parts.
BEARING HOUSING
Inspect the inner surface and bores of the front bearing
housing. The bore for the seal gland should be smooth to
prevent oil leakage. If it is nicked or scratched, replace the
bearing housing.
The surface near the gears should show two interconnect-
ing polished circles without a step and should not be rough
or grooved. Replace the housing if it is damaged or the mo-
tor appears to slow down excessively or be low on power.
Shake the bearing housing. The two seal check balls
should rattle. If they do not, the check valves are probably
plugged with contaminants and the bearing housing should
be replaced.
GEAR HOUSING
Inspect the inner surface and bores.
The chamber bores and bottoms around the shaft bushings
should appear smooth and polished. If they are rough or
grooved, replace the gear housing.
The fl at surface around the chamber and bolt holes should
be fl at and free of nicks or burrs that could cause misalign-
ment or leaks. If they are not smooth, replace the gear
housing.
BUSHINGS
Inspect the bushings for wear or discoloration.
The inside of the bushing should be gray with some bronze
showing through. If a signifi cant amount of yellow-bronze
shows, replace the bushing.
Inspect the motor shaft for corresponding wear. Replace as
required.
GEARS
Check the gears for wear or damage.
Both gears should have square tooth ends, straight tips
without nicks, and a smooth, even polish on the teeth and
end faces. Replace both gears if either one is worn or dam-
aged.
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