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Gear Reducer / Bearing Assembly
Replacement
This procedure assumes the motor has been
removed (see Air or Electric Motor Removal , page
12). Refer to Fig. 8, page 12 for this procedure.
1. Loosen and remove the socket head cap screws
(70) and lock washers (72) holding the bearing
housing to the flange.
2. Remove the gear reducer and bearing housing (21
and 36) from the flange (75) as an assembly.
3. Unpack the new gear reducer and bearing assem-
bly (21 and 36), being very careful not to alter the
orientation and alignment of the gears.
4. Install the socket head cap screws (70) and lock
washers (72) to secure the bearing housing to the
flange, and tighten.
NOTE: For best results, apply lubricant, such as
grease or anti-seize compound, to screws when re-
assembling.
5. Loosen the set screw on the sun gear (9), remove
from the new gear carrier, and replace the old sun
gear on the motor shaft. Set the elevation of the
sun gear and drive coupling (102) from the motor
as shown in Fig. 7, page 12 (use the dimension
recorded in step 5.a on page 12, or nominal, as
shown).
6. Pack the new gear carrier with grease (see Gear
Carrier Lubrication), and continue with Air or
Electric Motor Replacement on page 14.
Service
Gear Carrier Lubrication
All agitator bearings are sealed and pre-packed with
lubricant. Lubrication of these bearings is not neces-
sary.
Change the gear housing grease when performing
service involving motor or gear removal, or whenever a
grease change is necessary due to deterioration or
discoloration.
To change the gear housing lubricant:
1. Remove the motor from the gear housing (see Air
or Electric Motor Removal). Secure the gear
housing in an upright position when removing the
motor from the gear housing to avoid spillage.
2. Remove all old grease from the gear chamber and
wipe clean.
3. Pack the gear chamber with fresh grease (use
Mobil Mobilith SHC 007). The housing grease
capacity is approximately 1 lb. (.45 kg). Fill the
gear housing to a level about two inches (50mm)
from the top of the housing.
Use only Mobil Mobilith SHC 007 lubricant to
lubricate the gear housing. The use of any other
may cause part deterioration or inadequate
performance.
NOTE: When packing grease, paddle the grease,
while rotating the shaft manually, and shake the
housing, for more complete coverage.
CAUTION
310500
13
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