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 154 of 528

TM 9-2330-356-14

Table 4-9. Unit Troubleshooting (Con‘t).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE (Con’t)

21. BLACK SMOKE EXHAUST OR EXCESSIVE FUEL CONSUMPTION (Con’t).

Step 2.

Step 3.

Inspect for proper grade or dirty fuel,

Check fuel specification (para 2-10). Drain, fill with proper grade of fuel. If fuel is dirty, check

fuel filter (para 4-73).

Inspect for dirty air cleaner.

a.

Service air cleaner (para 3-18).

b.

Replace air cleaner if damaged (para 4-74).

22. PREHEAT INDICATOR LAMP WILL NOT LIGHT.

Step 1.

Check for burned out lamp (para 4-24).

Replace burned out lamp.

Step 2.

Check battery conditions (para 4-23).

a.

Clean cables and terminals.

NOTE

Do not slave start or jump start batteries.

b.

Charge battery (para 4-23).

Step 3.

Test preheat switch (para 4-24).

Replace if defective.

Step 4.

Remove engine junction box cover. Turn preheater solenoid switch to ON position and listen for

clicking sound.

a.

Replace preheater solenoid (para 4-18) if no sound is heard.

b.

If sound is heard, replace manifold heaters (para 4-20).

CENTRIFUGAL PUMP

23. PUMP FAILS TO DELIVER FUEL.

Step 1.

Check if pump either has lost prime or has not been primed.

Prime pump (para 4-90).

4-18