TM 10-3930-641-34-1
BRAKES TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. EMERGENCY BRAKE DOESN'T WORK
NOTE
Use parking/emergency brake test. (See TM 10-3930-641-10.)
Step 1. Inspect parking brake control valve linkage for correct adjustment or defective parts.
a.
Adjust linkage. (See TM 10-3930-641-20.)
b.
Replace defective parts. (See TM 10-3930-641-20.)
Step 2. Inspect for wear of plates and discs.
Replace plates and discs if thickness of plate and disc assembly is less than 1.394 in.
Step 3 Test compression of springs. (See page 5-63.)
Replace springs. (See page 5-63.)
Step 4. Inspect parking brake control valve.
Check for bent valve stem.
Replace valve stem and seals. (See page 5-63.)
11. EMERGENCY BRAKE DOESN'T DISENGAGE WHEN RELEASED PRIOR TO OPERATION OF VEHICLE
Step 1. Inspect linkage for correct adjustment. (See TM 10-3930-641-20.)
Adjust linkage. (See TM 10-3930-641-20.)
Step 2. Inspect for leakage around valve stem.
a. Inspect valve stem plug and seal.
Retorque valve stem plug (7 lbs to 11 lbs).
b. Inspect valve stem for wear.
Replace valve stem. (See page 5-63.)
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