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.
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.
Check for proper grade of oil. Oil maybe too heavy in viscosity.
Step 2.
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.
If defective, replace manifold heater or lead.
(Defective fuel system) Check fuel lines for leaks. Test for non-functioning electric fuel pumps
Step 2.
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.
Step 3.
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).
Check for dirty fuel or clogged fuel filter.
Step 4.
a. If fuel is dirty, drain and refill tank with clean fuel.
Inspect for proper grade of fuel.
Step 5.
Check fuel specifications (para 2-10), drain fuel tank, and fill with proper grade of fuel.
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