Wheel Bearing/Cup Replacement - GMC G Service Manual

1. Wheel and tire assembly.
2. Axle shaft (52). Refer to "Axle Shaft Replacement" in
this section.
3. Nut (40) using J 2222-C (figure 25), or retaining ring
(56).
4. Lock (41) or key (57).
5. Adjusting nut (42 or 58). Refer to figure 25.
6. Washer (43).
7. Hub and drum (48 and 49).
] Inspect
• All parts and replace as necessary.
Figure 25 — Removing or Installing Bearing
Adjusting Nut
Install or Connect (Figures 24 and 25)
NOTICE: For steps 3, 4 and 5 see " Notice" on
page 4B1-1 of this section.
Tool Required:
J 2222-C Wheel Bearing Nut Wrench
1. Hub and drum (48 and 49) to the tube.
• Be sure the bearings (44 and 46 or 59 and 61)
and the oil seal (47 or 62) are positioned
properly.
• Apply a light coat of high melting point EP bear­
ing lubricant to the contact surfaces and the out-
side of the a xle tu b e (6 3 ). R e fe r to
M A IN TE N A N C E AND LU B R IC A TIO N
(SEC. OB).
2. Washer (43)
• Engage tang in keyway.
3. Adjusting nut (42 or 58). Refer to figure 25.
0 Adjust
• Adjusting nut (42 or 58) to "Specifications" at
the end of this section while turning the hub
(49).
REAR AXLE 4B1-17
4. Lock (41) or key (57).
• Bend the tang to the flat of the adjusting nut (42)
or insert the key (57).
5. Nut (40) or retaining ring (46). Refer to figure 25.
Tighten
• Nut (40) to "Specifications" at the end of this
section.
6. Axle shaft (52). Refer to "Axle Shaft Replacement" in
this section.
7. Wheel and tire assembly.
• Lower the vehicle.
WHEEL BEARING/CUP
REPLACEMENT
M Remove or Disconnect (Figures 24 and 26)
Tools Required:
J 8092 Driver Handle
J 24426 Outer Wheel Bearing Cup Installer
• Raise the vehicle until the wheels are free to rotate.
1. Axle shaft (52). Refer to "Axle Shaft Replacement" in
this section.
2. Hub and drum assembly (48 and 49). Refer to "Hub
and Drum Assembly Replacement" in this section.
3. Inner bearing (46 or 61) and oil seal (47 or 62).
• Lay the drum (48) on a flat surface with a shop
towel to catch the bearing (46 or 61) and seal
(47 or 62).
• Use a drift to remove the bearing cup and seal.
4. Retaining ring (45 or 60).
• Use snap ring pliers to remove the ring.
5. Outer bearing (44 or 59) using J 8092 with J 24426
(figure 26).
• Drive the bearing (44 or 59) and cup from the
hub (49).
B l n
Clean
• Old sealing compound from the oil seal (47 or 62)
bore in the hub (49).
• Bearing assemblies in a solvent using a stiff brush to
remove the old lubricant. Dry the bearings with com­
pressed air. Do not spin them.
• Lubricant from the axle tube (63) and inside the hub
(49).
• Gasket material (if used) from the hub (49) and axle
shaft (52).
V ? \ Inspect
• Bearings for wear, chipped edges or other damage.
Check for flat or rough spots on the rollers. Refer to
wheel bearing diagnosis illustrations in this section
(figures 2 through 5).
• Cups for pits and cracks.