TM-9-2330-356-14

SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1

TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1990

TM-9-2330-356-14 - Page 146 of 528

TM 9-2330-356-14

Table

4-9.

Unit Troubleshooting.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM

1.

ALL LAMPS DO NOT LIGHT.

Step 1.

Check for burned out fuse in towing vehicle.

Replace fuse if burned out.

Step 2.

Check for loose receptacle ground leads.

a.

Remove front access cover (fig. 4-17).

b.

Check for loose ground leads. Tighten if loose.

c.

Replace access cover.

2.

ONE OR MORE LAMPS (BUT NOT ALL) WILL NOT LIGHT

Step 1.

Check for burned out lamp.

Replace burned out lamp.

Step 2.

Check for corroded or dirty lamp sockets.

Clean lamp sockets.

Step 3.

Check for a broken circuit.

Refer to chassis wiring schematic (fig. 4-15) and check circuit with a multimeter (para 4-9).

3.

DIM OR FLICKERING LIGHTS.

Check for loose receptacle ground leads,

See Step 2 under Malfunction 1,

ALL LMPS DO NOT LIGHT.

BRAKE SYSTEM

4.

BRAKES WILL NOT RELEASE.

Step 1.

Check for broken brake shoe tension spring. Remove wheel and tire and brake drum to expose

wheel brake (para 4-49).

If brake shoe tension spring is broken, replace the spring (para 4-33 or 4-34).

Step 2.

Test for leaking fail-safe chamber (para 4-39 or 4-40).

If fall-safe chamber is leaking, replace fail-safe chamber (para 4-39 or 440).

Step 3.

Charge air system from towing vehicle or outside source.

Check for leaks in secondary reservoir and connections if brakes still do not release.

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