Stanley CS11 Service Manual page 25

9. The ball bearing(s) should be removed from the mo-
tor shaft only if they must be replaced because dam-
age can occur during removal. To remove the bear-
ings from the motor shaft, press on the threaded end
of the motor shaft while supporting the outer race of
the bearing(s). Dis card the bearings.
10. Remove the retaining ring at the bottom of the ball
bearing bore to service the motor shaft seal(s).
11. To remove the seal liner and associated parts on
current two and three-piece motor assemblies, in-
sert the small end of the motor shaft through the
seal liner. Place a rag across the gear face of the
front bearing retainer and blow air through the small
diameter motor shaft bearing. Use a shop air nozzle
to force the seal liner onto the motor shaft for re-
moval.
12. To remove the seal from former two-piece motor as-
semblies, use appropriate O-ring service tools to pry
it out of its bore. Take care to avoid damaging the
seal surfaces. Note seal orientation.
13. To remove the needle bearings on three-piece mo-
tors, use Collet P/N 05871, and Ac tuator Pin P/N
05872, along with Slide Hammer P/N 11931. These
tools are available in Bearing Puller Kit P/N 05064.
To remove the bushings on two-piece motors, use
Collet P/N 11930 and Actuator Pin P/N 05067, along
with Slide Hammer P/N 11931.
MOTOR INSPECTION AND
CLEANING
Inspect and clean all parts as follows:
CLEANING
Clean all parts with a degreasing solvent. Blow dry with
compressed air and wipe clean. Use only lint free cloths.
SMALL DIAMETER BEARINGS/BUSHINGS
On three-piece motors equipped with needle bear ings,
check to make sure all rollers are in place and not nicked
or seized. If shaft wear is present, the bearing and shaft
must be replaced.
On two- or three-piece motors equipped with bushings,
the inside of the bushing should be gray with some
bronze showing through. If a significant amount of yel-
low-bronze shows, bushing replace ment is required. In-
spect motor shaft for corre sponding wear and replace
as required.
GEAR CHAMBER
The chamber bores and end faces around the bearing
bores should be polished but not rough or grooved. The
flat surfaces around the chamber and bolt holes should
be flat and free of nicks or burrs that could cause mis-
alignment or leaks.
GEARS
Both gears should have straight tips without nicks;
square tooth ends and a smooth even polish on the
teeth and end faces. Check for cracks between the drive
gear keyway and gear tooth root. Discard the gear if
cracks are present.
MOTOR END HOUSINGS/RETAINERS
The gear face running surface should show two inter-
connecting polished circles without a step and should
not be rough or grooved.
The shaft seal bore should be smooth and free from
nicks or scratches.
SHAFTS
The shaft diameter at the bearing and seal locations
must be smooth. Grooves, roughness or a reduced di-
ameter indicate fluid contamination or damaged needle
bearings. Grit particles may have been imbedded in the
bushings grinding into the hardened shaft. If abnormal
shaft wear as above occurs (in excess of normal polish-
ing), both the shaft and associated bearings/bushings
must be replaced.
REASSEMBLY
1. On current two and three-piece motors, as semble
the seal liner assembly by installing the outside di-
ameter O-ring, quad ring and (seal liner washer on
three-piece motors only) as shown on the parts lo-
cation diagram. Place idler shaft through the seal
liner then loosely position the assembly in the seal
bore of the front bearing retainer (quad ring side
down). Place the seal liner washer over the shaft
then carefully push the seal liner into place. Install
the retaining ring. Remove the idler shaft.
IMPORTANT
The graphite seal liner must not be forced, pried
or pushed on directly because it can be easily
damaged.
SERVICE
CS11 Service Manual ◄ 25