MCi Crusader II 1989 Maintenance Manual page 466

Date
1-1-89
Page __
1_5-_1 _ _ _
MC-9 MAINTENANCE MANUAL
If excessive wear, deterioration, cracking, scoring or pitting
are present on the bearing cups, rollers or cones, the bearings
should be replaced. Seals should be inspected for wear, deter-
ioration, distortion, or damage at the sealing surfaces. Defective
seal assemblies should be replaced.
Installation is the reverse of disassembly. Refer to Oil Seals,
Front Wheels and Trailing Wheels, for oil seal installation. Bear-
ings must be adjusted as explained in previous procedure.
DRIVE WHEELS
Drive wheels use a single oil-seal assembly and are lubri-
cated from the supply of oil in the differential housing. Bearings
are tapered roller, adjustable for wear.
The hubs require no periodic checking of lubricant level,
provided correct level is maintained in the differential housing.
BEARING ADJUSTMENT
To adjust the drive wheel bearings, proceed as follows:
1. Jack up the rear of the coach after blocking the front
wheels to prevent rolling.
2. Remove the plug from the bottom of the axle housing and
drain the lubricant
3. Remove the axle shaft drive stud nuts and lock washers.
See figure 15-14.
4. Using a heavy steel hammer or drift, sharply rap the axle
shaft flange in the center to free the tapered dowels.
5. Remove the dowels.
CAUTION: Do not pry the axle shaft free. To
do so will damage the hub and oil seals.
6. Remove the axle sha~
7. Remove and discard the axle shaft gasket
8. Remove the outer bearing lock nut and washer.
9. While rotating the wheel, tighten the adjusting nut until .the
wheel binds. This assures proper contact of all bearing contact
surfaces.
10. Back off the adjusting nut approximately
¼
turn and
check that the wheel turns freely.
11. Replace the washer, positioning locking tab in groove of
axle beam.
12. Install lock nut, tighten· to 100-125 ft. lbs. (136-170 Nm)
torque.
13. Rotate wheel to check bearing adjustment Wheel must
rotate freely without any end play. .
14. Install axle shaft and new gasket Take care to properly
mate shaft splines in drive gear of differential.
15. Insert the tapered dowels into the shaft flange and hub.
16. Install the stud nuts and lock washers. Tighten to 200-
250 ft. lbs. (271-339 Nm) torque.
17. Clean differential drain plug of any steel particles cap-
tured by the plug's magnetism and install in differential case.
18. Remove fill plus and add proper quantity of oil as speci-
fied
in
Sections 2 and 10 of this manual.
27
29
J
I
28
HUB
OUTER WHEEL RIM
11
1. Nut
2. Lock Washer
3. Dowel
4. Axle Shafi Flange
5. Axle Shaft Gasket
6. Bearing Nut
7. Washer
8. Adjusting Nut
9.
Outer Bearing Cone
10. Ouler Bearing Cup
11. Screw
12. Nut
13. Nut
14. Retaining Screw
15. Drum ·
1 2 AXLE BEAM END
13
16. Stud
17. Stud
18. Hub
19. Inner Bearing Cup
20. Inner Bearing Cone
21.
Gasket
22. Seal Retainer
23. Seal
24. Washer
25. Retainer Screw
26. Oil Seal Wiper
27. Oil Slinger
28. Washer
29. Nut
INNER WHEEL RIM
Figure 15-14. Drive Axle Hub and Drum.
DRUM