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 152 of 528
TM 9-2330-356-14
Table 4-9. Unit Troubleshooting (Con‘t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (Con’t)
16. LOW OIL PRESSURE (MINIMUM 20 PSI) (Con’t).
Step
2.
Inspect for defective oil gage (para 4-24).
Replace oil gage (para 4-24).
17. HIGH OIL PRESSURE (ABOVE 40 PSI WHEN ENGINE IS WARM).
Step 1.
Check if engine is overfilled with oil.
Drain oil until oil in engine is proper level.
Step 2.
Check for proper grade of oil. Oil maybe too heavy in viscosity.
Check oil specifications in Lubrication Charts (fig. 3-1 through 3-6). if wrong oil, drain the
engine and refill with the proper grade of oil.
18. ENGINE MISFIRES AT HEAVY LOAD.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Check for defective manifold heater and lead (para 4-20).
If defective, replace manifold heater or lead.
(Defective fuel system) Check fuel lines for leaks. Test for non-functioning electric fuel pumps
(para 4-73).
a.
Tighten all connections and replace or repair any damaged fuel lines.
b.
Replace fuel pump, if defective, or repair or replace fuel pump wiring (para 4-73).
Check air cleaner dirt indicator for showing of red band and examine for clogged filter intake.
a.
Replace filter element if red band is showing (para 3-18).
b.
Remove air cleaner intake cap and clean as necessary (para 3-18).
c.
Replace air cleaner if damaged (para 4-74).
Check for dirty fuel or clogged fuel filter.
a.
If fuel is dirty, drain and refill tank with clean fuel.
b.
Replace dirty fuel filters (para 4-73).
Inspect for proper grade of fuel.
Check fuel specifications (para 2-10), drain fuel tank, and fill with proper grade of fuel.
4-16
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