Parking Brake Operational Check

P4 MM 42.05; 5th Generation Cascadia MM
    Caution: Perform the following check in a clear safe area. If the parking brakes fail to hold the vehicle, personal injury or property damage may result.
    Important: This procedure should be performed prior to lubrication of the brake components.
  1. With the engine running, and air pressure at cut-out pressure, set the parking brake.
  2. Put the vehicle in the lowest gear and gently attempt to move it forward. The vehicle should not move. If the vehicle moves, the parking brakes are not operating correctly and must be repaired before the vehicle is returned to service. See General Description, Meritor WABCO Antilock Braking System, ABS in the New Cascadia Workshop Manual.
Note:
Parent topic: Inspection of the Brake
Document Number: 0000103252
Manual Publication Date: 2025-07-14
Topic Publication Date: 2026-05-06