MCi Crusader II 1989 Maintenance Manual page 467

Date
1-1-89 Page ___
1_5-_a _ _
MC-9 MAINTENANCE MANUAL
DISASSEMBLY AND INSPECTION
First block the front wheels to preventthe coach from rolling,
jack up the rear and remove the wheel nuts, tires and rims. Then
perform steps 2 thru 8 of the previous procedure (Bearing
Adjustment). Follow this procedure for disassembly and repair.
1:
Remove the drum-to-hub retaining screws.
2. Remove the brake drum from the hub.
3. Remove the bearing nut washer and adjusting nut
4. Remove the hub, taking care that the outer bearing cone
does not fall out of the hub.
5. Remove the outer bearing cone.
6. Remove the nut and washer mounting the oil slinger to the
hub. Remove the slinger.
7. Remove the seal retainer screws, seal wiper, washer, the
seals. seal retainer and gasket Discard the gasket
8. Remove the inner bearing cone.
9. Using a hammer and brass driver, remove the inner and
outer bearing cups.
10. Clean all parts thoroughly with cleaning solvent Dry with
compressed air. Use a stiff brush to remove hard, caked•on
lubricant
11.
Inspect bearing cups. cones including rollers and hub for
pitting, scoring, cracks, deterioration or wear: Replace as
necessary.
12. Inspect seals for distortion, cracks, deterioration . or
damage. Replace as necessary. Refer to Oil Seal Installation,
below.
13. Installation procedure is reverse of disassembly.
14. Perform adjustment procedure as specified.
OIL SEAL INSTALLATION
FRONT HUBS AND TRAILING WHEEL HUBS
Tool 20-103 should be used for the installation of oil seals
into the seal bore of the hub. Use of this tool assures correct .
placement of the seal to prevent leakage of lubricant
FRONT HUBS AND TRAILING WHEEL HUBS
Proceed as follows to install the oil seal in the front hubs and
trailing wheel hubs (inner bearing cup must be in place in hub):
1. Remove any burrs or nicks from spindle shoulder. Use
emery cloth or stone.
2. Apply liberal coat of Boretite sealant (Chicago-Rawhide)
or equivalent to spindle shoulder 0.D.
3. Bolt the centering plate of tool 20-103 to the hub. Bolts
need only be finger-tight
4. Turn wheel over and remove any burrs or nicks from the
bore of the hub.
5. Lightly coat bore of hub with Boretite or equivalent
6. Insert rod (cotter pin end) of tool 20-103 in hole of center-
ing plate.
7. Apply lubricant to inner bearing cone and insert into cup
in hub.
8. Place tool 20-103 squarely on edge of seal bore.
9. Slip the seal adapter over the tool rod. Rest it on the seal so
that the lip of the adapter fits over the outside of the seal (figure
15-15).
10. Insert centering plug in bore of inner bearing cone (fig-
ure
15-16).
Figure 15-15. Seal and Adapter on Tool Rod.
Figure 15-16. lnstalllng Tool With Seal in Hub.
Figure 15-17. Driving Seal Into Bore.
11. Using either a 3-5 lb. (1.4-2.3 kg) hammer or slide-
hammer, drive the seal into the bore until it bottoms out See
figure 15-17.
12. Remove tool 20-130 and centering plate. Wheel is now
ready for installation on the axle.
CAUTION: Do not damege .... when install-
ing
wheel
over axle spindle.
Refer to Bearing Adjustment, above. to seat and adjust the
wheel bearings. Add the correct quantity of SAE 30 engine oil to
the hub for proper lubrication.