We have recently checked several cases where a “crunching” noise occurs when brakes are applied at low car speeds. Although this noise can be caused by several points of movement in the 1950 Buick brake assembly, it appears that a major portion originates between the 1950 Buick brake shoe hold-down spring retainers and the brake shoe web. Retainers used in current production have a heavy burr on the outer edges which may scrape on the shoe web. (See Figure 36)
Use the following procedure to correct this difficulty:
- Remove the hold-down spring retainers. (Both sides)
- Remove the burr with a file. (Inset – Figure 36)
- Apply Lubriplate to the inner retainer and reinstall.
- To complete the correction, apply Lubriplate sparingly to the shoe ledges and to the ends of the brake shoe return spring.
- Adjust 1950 Buick brake shoe clearance as required.
It has been brought to our attention that some dealers are attempting to make 1950 Buick brake line repairs with copper tubing. We wish to emphasize that copper is subject to failure in this application and should not be used under any circumstances. In the future all 1950 Buick brake line replacements must be made with factory parts specifically intended for that purpose.