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Inefficient operation of the triple control servo con- Inefficient operation of the parking brake manual con- YES NO YES YES NO YES 6 YES NO Inefficient operation of the relay valve Overhaul or replace the relay valve. POOR OR NO TRAILER PARKING BRAKING Air system pipes leak or burst Close or replace the worn or damaged fittings. Replace Overhaul or replace the triple control servo control Overhaul or replace the lever. Inefficient operation of the trailer brakes YES NO Trailer brake linings worn and/or vitrified Overhaul or replace the trailer brake linings. Overhaul the trailer brakes. NO Inefficient operation of the rear brakes Overhaul the rear brakes. YES (continued) S TRALIS AT/AD 54 AIR SYSTEM - BRAKES Base - January 2003 |