Table 3-1. Operator/Crew Troubleshooting (Con't).
TEST OR INSPECTION
Wear safety goggles when working with airbrake system to protect eyes from high
Check brake hoses (13) and fittings (14) for damage or leaking by listening for hissing sound while
system is under pressure.
Check semitrailer air reservoir (12) for open draincock (11).
If draincock (11) is open, close.
If draincock (11) is closed and brakes still do not apply, notify unit maintenance.