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TM10-3930-660-20
Table 2-3.
Mechanical Troubleshooting (Cont’d)
A C T I O N
TEST OR INSPECTION
CORRECTIVE ACTION
37. PARK BRAKE WILL NOT RELEASE
Step 1. Check for out of adjustment park brake linkage.
Adjust or replace park brake cable, para. 12-4.
Step 2. Check for binding of internal park
Remove park brake drum and inspect
38. POOR OR NO BRAKES
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
brake mechanism.
for wear or damage, para. 12-3.
Check
Bleed
Check
for air in brake system.
brake system, para. 12-5.
for leaking, damaged, or obstructed brake lines.
Repair or replace brake lines as necessary, para. 12-9.
Check for low accumulator pressure caused by weak tandem gear pump
output.
Replace tandem gear pump if small section flow and pressure is found,
para. 18-4.
Check for low accumulator charging pressure.
Adjust accumulator charging pressure as needed in brake control valve,
para. 12-8.
Check for low nitrogen precharge or faulty accumulator.
Replace or repair accumulator if necessary, para. 12-8.
Check for leakage at service brake shoe calipers.
Inspect service brake shoe calipers for oil. Replace service brake shoe
calipers. Refer to Direct Support Maintenance.
Check for worn service brake shoes.
Replace service brake shoes if necessary, para. 12-6.
Check for low hydraulic oil.
Add hydraulic oil to proper level, LO10-3930-660-12.
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