Table 2-1. Operator/Crew Preventive Maintenance Checks and Services (PMCS)
ITEM TO BE INSPECTED
B D A
PROCEDURES: CHECK FOR AND HAVE
REPAIRED, FILLED, OR ADJUSTED AS NEEDED
Two or more wheel
Check wheels for damage and wheel nuts
for tightness and presence.
nuts loose or
missing from any
AIR HOSES AND CABLES
Check intervehicular air hoses
Air hoses or inter-
and cables for cuts and breaks.
are broken or
broken or damaged.
(gland hands) for security and/or
b. Test brake system by connecting
Service brakes fail
semitrailer to towing vehicle. Check
hose connections and make sure the towing
vehicle air service line valve is turned
on. Actuate the service brakes.
Service brakes can be heard to
actuate at the semitrailer. Air
chamber push rods will compress.
c. With semitrailer connected to the
Air leaks are
towing vehicle, have an assistant actuate
the service brakes and listen for air
leaks at the gladhands, at the relay
valve, multi-function valve and at the
d. Be alert for unusual difficulty in
stopping that would indicate that the
semitrailer service brakes are