TM 10-3930-675-20-1
0006 00-16
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0006 00
Table 3. Brake System Troubleshooting Procedures (Non-Error Code).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Braking is Poor or Nonexistent.
1. Ensure that brake system
accumulator shutoff valves are
in closed position.
Close shutoff valve as required
(WP 0164 00).
2. Inspect brake pedals for
damage and obstructions.
a. Remove any obstructions.
b. Repair or replace damaged
brake pedal (WP 0130 00).
3. Check hydraulic brake lines
and hoses for damage and
signs of leakage.
a. Tighten loose connections.
b. Replace damaged or leaking
lines and hoses (WP 0125 00).
4. Test operating pressure for
brake system circuits 1 and 2
(WP 0186 00, test points no. 4
and 5). Operating pressure
should be 2523 psi (174 bar)
and
with
brake
pedal
depressed pressure should
stabilize at 1450 psi (100 bar).
a. Replace brake charging valve
(WP 0125 00).
b. Replace service brake control
valve (WP 0124 00).
c. Notify DS Maintenance to
replace boom and brake
system pump.
d. Notify DS Maintenance to
perform service brake pad
measurement checks.
5. Test accumulator pressure for
brake system circuits 1 and 2
(WP 0186 00, test points no. 1
and 2). Accumulator pressure
should be 2523 psi (174 bar).
Notify DS Maintenance to
service accumulators.
2. Parking Brake Will Not Release.
1. Ensure that brake system
accumulator shutoff valves are
in closed position.
Close shutoff valve as required
(WP 0164 00).
2. Inspect parking brake control
lever
for
damage
and
obstructions.
a. Remove any obstructions.
b. Repair or replace damaged
parking brake control lever
(WP 0122 00).
3. Check hydraulic brake lines
and hoses for damage and
signs of leakage.
a. Tighten loose connections.
b. Replace damaged or leaking
lines and hoses (WP 0123 00).
4. Test accumulator pressure for
brake system circuits 1 and 2
(WP 0186 00, test points no. 1
and 2). Accumulator pressure
should be 2523 psi (174 bar).
Notify DS Maintenance to
service accumulators.
