Removal Procedure
- Remove the drum. Refer to Propeller Shaft Parking Brake Drum Replacement .
- Remove the companion flange retainer bolt.
- Remove the companion flange at the transmission mainshaft.
- Remove the cotter pin and the clevis pin that hold the clevis at the operating lever (6).
- Remove the return springs.
- Remove the link (16).
- Remove the return spring.
- Remove the operating lever (1).
- Mark the operating lever (1) and the camshaft (2) in order to ensure proper assembly.
- Loosen the clamping bolt and the nut.
- Use a brass or hardwood punch in order to free the camshaft (2) from the operating lever (1).
- Remove the washer (10).
- Remove the camshaft (18).
- Remove the anchor pin nuts (3) and the washers (3), if necessary.
- Remove the camshaft support bracket (9), if necessary.
- Remove the anchor pins (13), if necessary.
- Inspect the camshaft support bracket (9) and the anchor pins (13) for distortion.
- Inspect the surface of the camshaft (18) where there is contact with the shoe webs for excessive wear.
- Inspect the anchor pins (13) and the nuts (3) for nicked or sheared threads.
- Inspect the camshaft (2) and the operating lever (1) for worn or stripped splines.
Replace the camshaft support bracket (9) and the anchor pins (13), if necessary.
Replace the camshaft (18) and shoe webs, if necessary.
Replace the anchor pins (13) and the nuts (3), if necessary.
Replace the camshaft (2) and the operating lever (1), if necessary.
Installation Procedure
- Lubricate the threads of the anchor pins (13) with GM P/N 1051344 Canadian 993037 or equivalent if the anchor pins were removed.
- Install the anchor pins (13) if the anchor pins (13) were removed.
- Install the camshaft support plate (18) if the camshaft support bracket (9) was removed.
- Install the spring washers (11) and the nuts (1) if the spring washers and the nuts were removed.
- Coat the camshaft (18) with GM P/N 1051344 Canadian 993037 or equivalent.
- Spread the ends of the parking brake shoes apart.
- Center the camshaft (18) between the ends of the parking brake shoes.
- Install the camshaft (18) into the support plate (23) and the camshaft support bracket (9).
- Install the link (16).
- Install the return springs 14,19.
- Coat the washer (2) with GM P/N 1051344 Canadian 993037 or the equivalent.
- Install the washer (2).
- Line up the marks on the camshaft (2) and the operating lever (1).
- The operating lever (1) must be held against the washer with the camshaft (2) against the link (4).
- Install the operating lever (1).
- Wrap the return spring (24) around the camshaft support bracket (9) and attach the spring ends.
- Install the following items:
- Install the companion flange and the retainer bolt to the transmission mainshaft.
- Install the drum. Refer to Propeller Shaft Parking Brake Drum Replacement .
- Adjust the parking brake. Refer to Park Brake Adjustment .
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.
Tighten
Tighten the nuts to 195 N·m (145 lb ft).
Tighten
Tighten the clamping bolt to 38 N·m (28 lb ft).
| • | The operating lever clevis |
| • | The clevis pin |
| • | The new cotter pin |
Tighten
Tighten the companion flange retainer bolt to 150 N·m (111 lb ft).