TM 9-2320-366-10-2
Table 3-2. Troubleshooting (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
j. AIR SYSTEM
AIR SYSTEM LOSES PRESSURE DURING OPERATION/SLOW, NO, OR INCORRECT AIR
PRESSURE BUILDUP.
Notify Unit Maintenance.
LARGE QUANTITY OF MOISTURE EXPELLED FROM AIR RESERVOIRS.
Notify Unit Maintenance.
AIR DRYER PURGES CONSTANTLY.
Notify Unit Maintenance.
NO AIR PRESSURE PRESENT AT REAR GLADHAND(S) (ALL MODELS EXCEPT M1088).
Step 1. Check to see if vehicle brakes operate.
(a)
Check vehicle parking brakes (para 2-27).
If parking brakes do not apply, perform Brake System Troubleshooting i8 Parking Brakes Do
Not Apply.
(b)
Check vehicle service brakes (para 2-27).
If service brakes do not apply, perform Brake System Troubleshooting i1 Excessive Braking
Distance.
Step 2. Inspect air hoses for kinks, damage, and leaks.
(a)
Inspect air hoses from rear gladhands to air brake protecting valve.
(b)
Inspect air hoses from air brake protecting valve to TRAILER AIR SUPPLY valve.
(c)
Inspect air hose from air brake protecting valve to inversion valve.
(d)
Inspect air hose from inversion valve to front axle quick release valve tee fitting.
(e)
Inspect air hose from air brake protecting valve to load sensing valve (all models except
M1089).
(f)
Inspect air hose from load sensing valve to booster valve (M1089 only).
(g)
Inspect air hose from air brake protecting valve to booster valve (M1089 only).
(h)
Inspect air hose from booster valve to service gladhand two-way check valve.
If any air hose is kinked, damaged, or leaking; notify Unit Maintenance.
Step 3. If air pressure is still not present at rear gladhand(s), notify Unit Maintenance.
NO AIR PRESSURE PRESENT AT ALL M1088 REAR AND FIFTH WHEEL GLADHANDS.
Step 1. Check to see if vehicle brakes operate.
(a)
Check vehicle parking brakes (para 2-27).
Change 1
