BRAKE SYSTEM MAINTENANCE
GENERAL, REPLACEMENT, REPAIR
Air under 100 psi pressure is used in the operation of the air brake
system. Serious injury or death can result if precautions are not taken.
1. The following paragraphs cover procedures for testing, removal, disassembly, assembly and
installation of gladhand assembly, relay valve, and air lines. These paragraphs also cover cleaning,
inspection and repair of air lines.
2. The service brakes are straight air type with automatic break-away protection. When the
semitrailer brake system is properly connected to the service brake system of the towed vehicle,
the towing vehicle brake pedal operates the brakes on both vehicles.
END OF WORK PACKAGE