TM-9-2330-227-14-P
SEMITRAILER, VAN: SHOP, 6-TON, SINGLE AXLE, M146
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
JUNE 1985
TM-9-2330-227-14-P - Page 62 of 576
TM 9-2330-227-14&P
OPERATOR TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. BRAKES WILL NOT APPLY OR RELEASE - CONTINUED
WARNIN G
Failure to wear protective goggles when opening air reservoir draincock could cause
serious eye injury.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Check semitrailer air reservoir for open draincock.
a. If draincock is open, close it (page 2-13).
b. If draincock is closed and brakes still will not apply, or apply
slowly, notify Organizational Maintenance.
Check air pressure of truck tractor.
If pressure is low, build up air pressure to normal level (see Truck
Tractor Operator’s Manual).
Check connections of air lines to couplings.
If air lines are not properly connected (Emergency-to-Emergency, and
Service-to-Service), connect air lines (page 2-20).
Check for dirty or leaking coupling connection.
a. If coupling is dirty, clean (page 3-10).
b. If coupling is leaking, notify Organizational Maintenance.
Inspect brake air hoses and hydraulic lines and connectors for leaks.
If hoses or connectors are leaking, notify Organizational Maintenance.
Check for damaged or missing preformed packing in coupling.
If preformed packing is damaged or missing, notify Organizational
Maintenance.
8. BRAKES GRAB
Notify Organizational Maintenance.
3-6
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