12. Install back-up ring, O-ring, and O-ring in flange
plate. Use clean, heavy grease to hold O-rings in
grooves.
13. Attach a piece of tape over shaft keyway to protect
seal during assembly.
14. With O-ring in flange plate facing down and keep-
ing plate true with shafts, slide it down until it
contacts dowels in gear plate. Bump flange very
lightly with hands or plastic hammer to force the
plate down on dowels, at the same time making
sure grease is holding O-rings in grooves. Once
plate is in position, remove tape protecting seal
from shaft keyway.
15. Coat capscrew (13, Figure 4-4) threads with clean
hydraulic oil. Install washers (14) on capscrews.
Tighten to 80 ft. lbs (108 N-m) torque.
16. Using a twelve inch wrench, check to see if shaft
will turn. It will be tight but should turn free with a
15 lbs (6.8 Kg) maximum force on wrench.
Installation
1. Slide motor shaft with key into flex coupling on
blower wheel shaft. Tighten set screw of flex cou-
pling to 65 ft. lbs. (88 N-m) torque.
2. Install motor mounting capscrews, tighten to
standard torque.
3. Connect all hoses, tighten split flange capscrews
to standard torque.
BLOWER BEARING REPAIR
Removal
1. Remove blower inlet and outlet hoses.
2. Loosen setscrew in flex coupling (3, Figure 4-3) on
blower wheel shaft.
3. Remove all nuts, washers and capscrews securing
housing halves. Remove inlet half of blower hous-
ing.
4. Loosen setscrews in blower wheel. Slide wheel
from shaft.
5. Remove four blower housing retainer plates from
blower housing and mount bracket.
6. Slide bearing housing and remaining blower hous-
ing half from mount brackets and flex coupling.
Replacement
1. Loosen clamp ring setscrew in locking collar (6,
Figure 4-3) of one bearing.
2. Push other bearing with shaft out of housing.
3. Remove bearing remaining in housing.
91458
FIGURE 4-6. PRESSURE PLATE INSTALLATION
1. Trap
2. Pressure Plate
3. Gear Plate
4. Dowel
91459
FIGURE 4-5. COVER PLATE SEALS
1. O-ring
2. O-ring
3. Backup Ring
4. Dowel
5. Cover Plate
6. Drive Gear Bore
M04002 12/89 Alternator and Wheelmotor Cooling Air Filter System M4-7
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