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 313 of 528

TM 9-2330-356-14

Table 5-4. Troubleshooting - Direct Support (Con‘t).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE (Con’t)

4.

SLOW STARTER SPEED.

Step 1.

Check for worn armature shaft bushings (para 7-78).

Replace bushings. Replace starter if necessary.

Step 2.

Check for burned solenoid contacts (para 7-78).

Replace solenoid.

Step 3.

Check for open or shorted field windings (para 7-90).

Replace starter.

Step 4.

Check for worn engine crankshaft, rod, and camshaft bearings (para 7-77).

Replace bearings as necessary. Repair or replace other worn components as necessary.

5.

STARTER WILL NOT ENGAGE FLYWHEEL.

Step 1.

Check starter clutch (bendix) and pinion (para 7-78).

Repair or replace as necessary.

Step 2.

Check for damaged ring gear (para 7-78).

Replace ring gear if necessary.

6. ENGINE WILL NOT START WHEN CRANKED.

Step 1.

Check for faulty injection caused by dirty fuel.

Replace with clean fuel. Service fuel filters. Clean and, if necessary, repair or replace fuel

injection nozzle (paras 7-28 and 7-70).

Step 2.

Check for poor compression.

See Malfunction 15,

LOW ENGINE COMPRESSION.

Step 3.

Check for incorrect timing.

Retime engine (para 7-87).

7.

ENGINE MISFIRES.

Step 1.

Check for poor compression.

See Malfunction 15,

LOW ENGINE COMPRESSION.

Step 2.

Check for defective or dirty injection nozzles (para 7-70).

Clean or replace nozzles.

5-5