Removal Procedure
Caution: When servicing brake parts, do not create dust by grinding or sanding
brake pads, by cleaning brake parts with a dry brush or with compressed air.
Many earlier models or aftermarket brake parts may contain asbestos fibers
which can become airborne if dust is created during servicing. Breathing dust
containing asbestos fibers may cause serious bodily harm. A water dampened
cloth or water based solution should be used to remove any dust on brake parts.
Equipment is commercially available to perform this washing function. These
methods will prevent fibers from becoming airborne.
- Block the wheels.
- Raise and support the vehicle under the frame rails. Ensure that
the vehicle rear wheels are off the floor. Refer to
Lifting and Jacking the Vehicle
.
- Release the parking brake.
- Remove the rear tire and wheel assemblies. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Remove the rear axle lubricant. Refer to
Lubricant Change
.
- Remove the propeller shaft. Refer to the following list in order
to select the correct procedure:
- Remove the rear air brake lines, if equipped. Refer to
Trailer Coupling Hose and Line Bracket Replacement
in Air Brakes.
- Remove the shift motor assembly, if equipped. Refer to
Two Speed Rear Axle Shift Motor Replacement
in
Rear Axle Controls.
- Cage the spring brake chambers, if equipped. Refer to
Caging the Rear Air Brake Chamber
.
- Drain Reservoirs Refer to
Draining Reservoirs
.
- Remove the rear brake drum, if equipped. Refer to
Brake Drum Replacement
.
- Remove the rear hub assemblies. Refer to
Rear Hub and Bearing Replacement
.
- Remove the rear brake caliper mounting plate, if equipped. Refer
to
Brake Caliper Mounting Plate Replacement
.
- Remove the rear cam brake assembly, if equipped. Refer to
Cam Brake Assembly Replacement
in Air Drums.
- Remove the wiring attached to the rear axle housing.
- Remove the rear shock absorber from the rear shock absorber lower
bracket. Refer to
Shock Absorber Replacement
in Rear Suspension.
- Remove the following components:
- Remove the rear shock absorber lower bracket, if equipped. Refer
to
Shock Absorber Replacement
in
Rear Suspension.
- Remove the rear spring anchor plate bracket. Refer to
Leaf Spring Replacement
in Rear Suspension.
- Support the axle. Use a hydraulic transmission dolly with adapters
in order to properly handle the axle housing.
- Fasten a chain over the top of the housing and to both sides of
the dolly.
- Remove the rear axle housing from the suspension.
- Remove the differential carrier. Complete the following steps:
| 23.1. | Set the rear axle housing on an axle stand with the differential
carrier facing up. |
| 23.2. | Remove the following differential carrier components: |
| 23.3. | Strike the differential carrier housing using a rubber mallet
in order to break the seal. |
| 23.4. | Lift the differential carrier from the rear axle housing. Use
a chain lift or equivalent. |
- Clean the differential carrier seal surface.
- Clean the rear brake drum or rear bake rotor, and rear brake assemblies
using brake parts cleaner.
- Clean the rear wheel bearings.
- Inspect the new rear axle housing for the following conditions:
Installation Procedure
- Install the differential carrier.
| • | Lift the differential carrier, then lower the carrier onto the
rear axle housing. |
| • | Use a chain lift or equivalent. |
- Install the rear axle assembly to the suspension.
| • | Support the rear axle housing using a hydraulic transmission dolly
with adapters in order to properly handle the rear axle housing. |
| • | Fasten a chain over the top of the rear axle housing and to both
sides of the dolly. |
- Install the rear spring anchor plate bracket.
- Install the rear shock absorber lower bracket, if equipped. Refer
to
Leaf Spring Replacement
in Rear
Suspension.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the following
components:
Tighten
For U-bolt tightening procedures, refer to
Fastener Tightening Specifications
.
- Install the rear shock absorber to the rear shock absorber lower
bracket. Refer to
Shock Absorber Replacement
in Rear Suspension.
- Install the wiring to the rear axle housing.
- Install the rear cam brake assembly, if equipped. Refer to
Cam Brake Assembly Replacement
in Air Drums.
- Install the rear brake caliper mounting plates, if equipped. Refer
to
Brake Caliper Mounting Plate Replacement
.
- Install the rear hub assemblies. Refer to
Rear Hub and Bearing Replacement
.
- Install the rear brake drum, if equipped. Refer to
Brake Drum Replacement
.
- Uncage the spring brake chambers, if equipped. Refer to
Caging the Rear Air Brake Chamber
.
- Install the differential lock air line, if equipped.
- Install the shift motor assembly, if equipped. Refer to
Two Speed Rear Axle Shift Motor Replacement
in
Rear Axle Controls.
- Install the air brake lines, if equipped. Refer to
Trailer Coupling Hose and Line Bracket Replacement
in Air Brakes.
- Install the propeller shafts. Refer to the following list in order
to select the correct procedure:
Important: Add 0.94 liters (1 quart) to the power divider of the
tandem axle front unit, if equipped.
- Install the rear axle lubricant. Refer to
Lubricant Change
.
- Install the rear tire and wheel assemblies. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Lower the vehicle Refer to
Lifting and Jacking the Vehicle
.
- Inspect for air leaks. Refer to Air Leak Test in Brakes.
- Verify proper brake operation.
- Remove the wheel blocks.
