TM 10-3930-641-34-1
BRAKES TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. BRAKES FEEL SOFT OR SPONGY
Check for air in system.
Bleed air from system. (See TM 10-3930-641-20.)
7. TRANSMISSION DOES NOT DISENGAGE WHEN LEFT BRAKE PEDAL IS PUSHED
Step 1. Inspect adjustment of brake control linkage.
Adjust linkage. (See TM 10-3930-641-20.)
Step 2. Inspect neutralizer valve.
Inspect spools and springs.
Replace spools or springs. (See page 5-31.)
Step 3. Inspect transmission valve.
Repair/Replace. (See page 4-157.)
8. ACCUMULATOR PRESSURE IS NOT WITHIN RANGE
Step 1. Test cut-out pressure. (See page 5-14.)
Adjust cut-out pressure by adding or removing shims to charging spool springs. (See page 5-14.)
Step 2. Check cut-in pressure. (See page 5-14.)
Cut-in pressure must be within 475 psi to 575 psi of cut-out pressure.
Adjust by adding or removing shims to detent ball spring on the opposite end of spool.
ACCUMULATOR VALVE RELIEF VALVE DOESN'T WORK
Step 1. Inspect valve.
Repair/Replace. (See page 5-14.)
Step 2. Test relief valve cut-out pressure. (See page 5-31.)
Add or remove shims until relief cut-out pressure is 2650 psi to 2750 psi. (See page 5-14.)
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