0 SERIES
OM--05688
MAINTENANCE & REPAIR
PAGE E -- 10
drive shaft and use a suitable puller to remove the
drive shaft and assembled bearing (27) from the
gearbox housing. Retain the woodruff key (16) and
helical gear as they come free of the shaft.
Remove the capscrew from the tapped hole in the
end of the drive shaft.
The inboard bearing (29) will remain in the gearbox
housing. Reach through the cover plate opening to
remove the bearing.
After removing the shafts and bearings, clean and
inspect the bearings
in place
as follows.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected
in place
. It is
strongly
recommended that the bearings
be replaced
any
time the shaft and bear-
ings are removed.
Clean the gear housing, helical gear, drive and pin-
ion shafts, and all component parts (except the
bearings) with a soft cloth soaked in cleaning sol-
vent. Inspect the parts for wear or damage and re-
place as necessary.
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.
Clean the bearings thoroughly in
fresh
cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. failure to do so will greatly
shorten bearing life.
Do not
spin dry bear-
ings. This may scratch the balls or races
and cause premature bearing failure.
Rotate the bearings by hand to check for rough-
ness or binding and inspect the bearing balls. If ro-
tation is rough or the bearing balls discolored, re-
place the bearings.
The bearing tolerances provide a tight press fit
onto the shafts and a snug slip fit into the gearbox
housing. Replace the bearings, shafts or gearbox
housing if the proper bearing fit is not achieved.
If the bearings, pinion or drive shafts require re-
placement, use a suitable puller to remove the
bearings.
GEARBOX REASSEMBLY
Clean and inspect the bearings as indicated in
GEARBOX DISASSEMBLY
.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected
in place
. It is
strongly
recommended that the bearings
be replaced
any
time the shaft and bear-
ings are removed.
Inspect the helical gear (15), pinion shaft (45) and
drive shaft (24) for distortion, excessive wear, bro-
ken teeth, damaged keyways, nicks or scratches,
or for damage on the impeller or drive ends of the
shafts. Dress small nicks or burrs with a fine file or
emery cloth. Replace the shafts or gear as re-
quired.
NOTE
All of the bearings used in the gearbox are identical
parts; however, the inboard drive shaft bearing (28)
should not
be heated and installed on the shaft
prior to reassembling the gearbox.
The outboard drive bearing (27) and pinion shaft
bearings (30 and 31) may be heated to ease instal-
lation. An induction heater, hot oil bath, electric
oven, or hot plate may be used to heat the bear-
ings. Bearings should
never
be heated with a di-
rect flame or directly on a hot plate.
