Parking Brake Shoe Replacement Bendix 229mm - 9in

1. Remove the drum (8). Refer to Park Brake Support Replacement .
2. Remove the return springs (2).
3. Remove the anchor springs (5).
4. Remove the linings (1).
5. Spread the brake shoes apart.
6. Inspect the linings (1) for contamination.
7. Inspect the linings (1) for excessive wear. The minimum thickness (with bonded linings) is 1.52 mm (0.60 in).
8. Replace the linings (1) as a set, if necessary.
9. Inspect the springs for distortion.
10. Replace the springs, if necessary.
11. Inspect the cam lever (3) for grooves at the brake shoe contact points.
12. Replace the cam lever (3), if necessary.

1. Install the linings (1).
2. Place the cam lever (3) in position with the two fingers between the shoe webs.
3. Install the anchor spring (5).
4. Use GM P/N 1051344 or the equivalent in order to lubricate the points where the brake shoes contact the support plate (6).
5. Install the return springs (2).
6. Install the drum.
7. Adjust the parking brake. Refer to Park Brake Support Replacement .

Parking Brake Shoe Replacement Bendix 305mm - 12in

1. Remove the drum. Refer to Brake Drum Replacement .
2. Remove the return springs (14, 24).
3. Remove the link (16).
4. Remove the linings (17, 25).
5. Pull the linings (17, 25) outward and twist the linings in order to clear the anchor pins (13).
6. Overlap the linings (17, 25) in order to remove the adjusting screw (21) assembly.
7. Remove the adjusting screw spring (19).
8. Remove the socket (22).
9. Remove the adjusting screw (21) out of the pivot nut (20).
10. Inspect the linings (17, 25) for contamination.
11. Inspect the linings (17, 25) for excessive wear. The minimum lining thickness is 1.52 mm (0.60 in).
12. Replace the linings, if necessary.

Always replace the linings as a set.

13. Inspect the return springs and the adjusting screw spring (19). The return springs and the adjusting screw spring should not have a loss of tension or openings in the coils.
14. Replace the return springs and the adjusting screw spring (19), if necessary.
15. Inspect the shoe webs where there is contact with the camshaft (18).
16. Replace the linings if the shoe webs are severely worn.
17. Inspect the adjusting screw (21) and the pivot nut (20) for nicked or sheared threads.
18. Replace the adjusting screw (21) and the pivot nut (20), if necessary.
19. Inspect the support plate (23) for damage, distortion and corrosion.
20. Remove corrosion from the contact surfaces with a fine emery cloth.
21. Replace the support plate (23) if there is damage or distortion.

1. Apply a thin coat of GM P/N 1051344 or the equivalent to the surface of the support plate (23) and the support plate guides.
2. Coat the threads and the socket end of the adjusting screw (21) sparingly with GM P/N 1051344 or the equivalent.
3. Install the adjusting screw (21) assembly in the following order:

3.1.	Thread the adjusting screw (21) all of the way into the pivot nut (20).

3.2.	Place the adjusting screw socket (22) over the end of the adjusting screw (21).

4. Install the adjusting screw (21) assembly between the adjusting ends of the brake shoes. The star wheel must be closer to the top lining (25).
5. Install the spring (14).
6. Move the anchor ends of the linings (17, 25) together in order to overlap the shoe webs.
7. Install one lining (17, 25) on the guides of the support plate (23).
8. Lubricate the anchor pins (13) where the anchor pins contact the shoe webs with GM P/N 1051344 or the equivalent.
9. Twist the lining slightly in order to clear the end of the anchor pin (13) and position the lining over the pin.
10. Install the second lining (17, 25).
11. Install the link (16).
12. Install the return springs.
13. Install the drum. Refer to Brake Drum Replacement .
14. Adjust the parking brake. Refer to Parking Brake Shoe Adjustment .

Parking Brake Shoe Replacement Rockwell 305mm - 12in

1. Block the wheels.
2. Release the parking brake.
3. Remove the propeller shaft. Refer to the following procedures:

•	One-Piece Propeller Shaft Replacement

•	Two-Piece Propeller Shaft Replacement

•	Three-Piece Propeller Shaft Replacement

4. Remove the drum. Refer to Brake Drum Replacement .
5. Remove the nut (2).
6. Remove the washer (3).
7. Remove the camshaft (7).
8. Remove the lever (1).
9. Remove the return springs (5).
10. Discard the old return springs.
11. Replace the old return springs with new return springs.

Important: Closely examine the linings for contamination and excessive wear.

12. Remove the linings (4).
13. Mark each brake shoe in order to ensure that the assembly will be in the same position.

Important: Closely examine all of the mounting bolt holes in the drum for stress cracks.

14. Inspect the drum for the following damage:

•

Cracks

•

Scoring

•

Pitting

•

Grooves

•	Overheating damage

15. Replace the drum if necessary.

1. Install the linings (4).
2. Align the marks on each shoe in order to ensure that the linings are assembled in the original position.
3. Install new return springs (5).
4. Install the camshaft (7).
5. Install the lever (1).
6. Install the nut (2).
7. Install the washer (3).
8. Install the drum. Refer to Brake Drum Replacement .
9. Install the propeller shaft. Refer to the following procedures:

•	One-Piece Propeller Shaft Replacement

•	Two-Piece Propeller Shaft Replacement

•	Three-Piece Propeller Shaft Replacement

10. Adjust the parking brake. Refer to Parking Brake Shoe Adjustment .