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GM COACH MAINTENANCE MANUAL
Sec. 19
Page 201
2. Thoroughly clean all old lubricant out of
inside of hub and wipe dry.
Make sure all par-
ticles of gasket are removed from inner end of
hub.
3. Clean lubricant off axle housing tube (rear)
or spindle (front).
Wipe lubricant off oil seals,
using a clean cloth dampened with cleaning fluid.
Do not permit cleaning fluid or grease to get on
brake linings.
4. Wash all small parts such as bearing nuts,
lock rings, and oil seal wipers in cleaning fluid
and wipe dry.
INSPECTION
1. Inspect bearing rollers for excessive wear,
chipped edges, or other damage. Slowly roll roll-
ers around cone to detect any flat or rough spots
on cone or rollers.
Replace bearing assemblies
if any part is damaged.
2. Examine bearing cups in hub.
If
cups are
pitted or cracked, they must be replaced.
3. Carefully examine oil seals for signs of
wear, deterioration, distortion, or damage at the
sealing surfaces.
Replace oil seal assembly if
any of the above conditions are evident.
4. Inspect oil seal wiper, sleeve, or bearing
spacer for nicks or rough spots which would cause
rapid wear of seals.
Replace with new parts as
necessary.
5. After inspection is completed and parts
replaced as necessary, lubricate bearings and in-
side of hub as directed in LUBRICATION (SEC.
13).
FRONT HUB AND BEARING
INSTALLATION
(Figure
1)
1.
If
bearing cups are removed, drive or
press new cups into hub with wide side of cups
toward inside.
Make sure cups are fully seated
against shoulder in hub and are not cocked. Make
sure bearings and inside of hub are lubricated
as directed in LUBRICATION (SEC. 13).
2. Place inner bearing cone and roller as-
sembly in hub; then press oil seal into hub until
flush with inner end of hub. Seal wiper must point
inward.
3. Coat face of oil seal and bearing spacer
with grease.
4. Install hub assembly on spindle, then place
outer bearing cone and roller assembly on spin-
dle and push into hub with fingers.
Install bear-
ing adjusting nut and draw up finger-tight.
5. Install brake drum and retaining screws,
then install wheel.
6. Adjust wheel bearings and complete the in-
stallation as previously directed under "Bearing
Adjustment" in this section.
HUBS AND BEARINGS
REAR HUB AND BEARING
INSTALLATION
(Figure 2)
1.
If
bearing cups were removed, drive or
press new cups into hub with wide side of cups
toward inside.
Make sure cups are fully seated
against shoulder in hub and are not cocked. Make
sure bearings and inside of hub are lubricated as
directed in LUBRICATION (SEC. 13).
2. If inner oil seal was removed, press new
oil seal assembly into seal retainer. Use extreme
care when pressing oil seal into place not to dis-
tort the seal flange.
Make sure inner oil seal
sleeve is in place on axle housing tube.
22
21
1 Drive Plate Cover
2
Axle Shaft
3
Oil Seal Wiper
4 Drive Plate
5 Drive Plate Ring
6
Outer Oil Seal
7 Outer Bearing Cone
and Roller Assy.
8
Outer Bearing Cup
9
Hub
10 Wheels
11 Brake Drum
Retaining Screw
12 Brake Drum
13 Oil Slinger
14 Inner Bearing Cup
15 Gasket
16 Inner Oil Seal
Retainer
17 Inner Oil Seal
1.8
Inner Oil Seal
Wiper
19 Inner Bearing Cone
and Roller Assy.
20 Wheel Stud
21 Outer Wheel Nut
22 Inner Wheel Nut
23 Bearing Adjusting
Nut
24 Adjusting Nut Lock
Ring
25 Lock Nut
Figure 2-Rear Hub, Bearings, and Oil Seals
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