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 TM 55-1905-223-24-3
Table 2-2. Troubleshooting-CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
STEP 3.
Check for oil diluted with fuel.
Refer to Malfunction 13.
STEP 4.
Check for incorrect oil specifications.
Check oil specification (LO 55-1905-223-12).
Change oil (PMCS, Table 2-1, Item 15).
STEP 5.
Check if oil temperature is above normal 250F (120C).
Refer to Malfunction 8.
7.
High lubricating oil pressure.
STEP 1.
Check if oil pressure gauge is malfunctioning.
Refer to Malfunction 6, Step 2.
STEP 2.
Check for incorrect oil specifications.
Check oil specifications (L0 55-1905-223-12).
Change oil (PMCS Table 2-1, Item 15).
STEP 3.
Check for defective oil filter/cooler.
Replace oil filter/cooler (para. 2-34).
8.
Lubricating oil temperature above normal.
STEP 1.
Check for incorrect oil level.
Add or drain engine oil as required.
STEP 2.
Check for high engine temperature (above 212 ) (100 ).
F
C
a.
Check coolant level and thermostat operation. Refer to malfunction 1, Step 10.
b.
Check for damaged coolant hoses and tubing. Replace as necessary.
c.
Check for loose water pump belt and tighten as required (para. 2-33).
d.
Check water pump operation. Replace as required (para. 2-33).
STEP 3.
Check if oil temperature gauge is malfunctioning as follows:
a.
Drain the oil from the oil pan (TM 55-1905-223-10).
b.
Remove the pipe plug on either side of the oil pan. Install the oil temperature gauge sending unit.
c.
Fill the oil pan with clean oil. Refer to PMCS Table 2-1, Item 15.
d.
Check the following for defects:
(1)
Electrical wiring broken.
(2)
Sending unit malfunction (refer to step e. below).
e.
Use a master gauge of known accuracy to verify the reading of th suspect gauge.
e
f.
Replace the sending unit or the gauge if it is defective (para. 2-26).
2-30
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