5–3 Burnishing

After installing a new parking brake assembly, be sure to follow the burnishing procedure to attain full holding capacity. Follow the brake manufacturers recommended burnishing procedure. If a manufacturers procedure is not available, use the following procedure which is based on paragraph 7.3.2 of SAE procedure J360. Make ten stops from a maximum speed of 15 kph (9.5 mph) using only the parking brake to retard the vehicle. Space the stops at least 4 km (2.5 miles) apart and operate the vehicle at a minimum speed of 30 kph (18.5 mph) between each stop. Be sure to readjust the parking brake linkage when the burnishing procedure is completed.

CAUTION: Avoid sustained use of the parking brake while the engine is running and the transmission is in any selector position other than N (Neutral), P (Park), or PB (Park Brake Apply). Failure to observe this practice may cause transmission overheating and premature failure.