Table 2. Service Brakes Troubleshooting Procedures - continued

TM 9-2320-361-24-1

0010 00

COMPRESSED AIR AND BRAKE SYSTEM TROUBLESHOOTING (Contd)

Table 2. Service Brakes Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Check service brakeshoe (1) linings

If service brakeshoe (1) linings are

2. EXCESSIVE PEDAL

for oil or grease contamination.

saturated with oil or grease, repair oil

PRESSURE REQUIRED

or grease leak and replace brakeshoes

TO STOP VEHICLE

(WP 0167 00).

(BRAKE PEDAL

STOPS TWO INCHES 2. Direct assistant to apply service

1. If escaping air is present, replace

OR MORE ABOVE

brakes and listen for evidence of

air-hydraulic cylinder

FLOORBOARD); NO

air escaping at air hydraulic

(WP 0171 00).

APPARENT AIR

cylinder (2) and at vent (5).

2. If no air is escaping, proceed to

SYSTEM FAILURE

test 1.

Test 1. Check air-hydraulic cylinder

(2) for proper delivery line (7)

supply pressure.

1. Stop engine and open all drain

valves (TM 9-2320-361-10)

until brake system air

pressure is completely drained.

2. Remove two screws (3) and

shield (4) from air-hydraulic

cylinder (2).

3. Disconnect delivery line (7)

from elbow (6).

4. Remove elbow (6) from air-

hydraulic cylinder (2).

5. Install tee (9) on air-hydraulic

cylinder (2).

6. Connect test gauge (8) and

delivery line (7) to tee (9).

7. Direct assistant to start

engine (TM 9-2320-361-10)

and allow air pressure to build

to normal operating pressure.

NOTE

Air pressure gauge in instrument

panel has a maximum pressure

reading of 120 psi. If old governor has

been replaced with new governor, air

pressure may exceed maximum

pressure reading on instrument panel

gauge.

8. Check test gauge (8) reading

1. If reading on test gauge (8) is same

and compare with reading on

as instrument panel air pressure

instrument panel air pressure

gauge, replace air hydraulic

gauge.

cylinder (2) (WP 0171 00).

2. If reading on test gauge (8) is less

than instrument panel air pressure

gauge, check delivery line (7) for

restrictions. If delivery line (7) is

damaged or restricted, replace

(TM 9-243).

0010 00-6