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Disassembly
Note: The preferred method for rebuilding the front
wheel hub and spindle assembly is to remove these
components as a complete unit, then support the
assemblies in a fabricated rebuild fixture, allowing
disassembly and reassembly with the axis of the
spindle positioned vertically. If repairs are made with
spindle installed on truck, be certain to observe
CAUTION statement below.
1. Remove wheel hub and spindle as a complete
assembly as covered in "Removal".
2. To aid in complete disassembly of wheel hub
and spindle assembly, support assembly in a
vertical position using a fabricated spindle
stand.
3. Remove brake calipers from support as outlined
in Section "J", Brakes.
4. Remove cap screws & lockwashers (2, Figure
3-5) and cover (3).
5. Remove O-ring (10) from cover.
6. Remove cap screws & flat washers (5), bearing
retainer plate (8), and shims (7).
7. Attach a lifting device to the wheel hub and
carefully lift it straight up and off the spindle.
Remove outboard bearing cup (10) and cone
(9).
If disassembly of the wheel hub is accomplished
while on the truck, the outboard bearing cone
should be supported during wheel hub removal
to prevent cone from dropping and being dam-
aged.
NOTE: Half of the face seal (16) will remain in the
bore of the hub. Do not remove seal unless
replacement is required. Use extreme caution when
handling face seals. Seals must be replaced in a
matched set. If one seal is damaged, both seals
must be replaced.
G3-8
8. Remove face seal, bearing cone (19), and
spacer (18) from spindle.
9. If brake disc replacement is required, attach a
lifting device to the brake disc (1, Figure 3-6),
remove cap screws (2), and lift and brake disc
from hub (3).
10. If brake support replacement is necessary,
remove cap screws and flatwashers (21, Figure
3-5) and remove support (13).
FIGURE 3-6. BRAKE DISC REMOVAL
1. Brake Disc
2. Cap Screws & Flatwash-
ers
Cleaning and Inspection
1. Clean all metal parts in fresh cleaning solvent.
2. Replace any worn or damaged parts.
3. Replace O-rings and face seals if worn or dam-
aged.
4. Inspect wheel hub and spindle for damage.
5. Check all lips and cavities in spindle and wheel
hub for nicks or tool marks that may damage
the rubber seal ring on the face seals.
Front Wheel Hub and Spindle
3. Wheel Hub
G03029
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