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 TM 55-1905-223-24-3
Table 3-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Coolant temperature above normal.
STEP 1.
Check for obstructed or damaged oil cooler.
Clean and inspect oil cooler (para. 3-15).
2.
Loss of engine coolant (internal leakage).
STEP 1.
Check for leaking lubricating oil cooler.
Inspect cooler element (para. 3-15).
3.
Lubricating oil in coolant.
STEP 1.
Check for malfunctioning oil cooler.
Inspect oil cooler (para. 3-15).
4.
Low lubricating oil pressure.
STEP 1.
Check to see if main oil pressure regulator is indicating low
pressure on the lube ol cooler/filter.
i
Clean or replace pressure regulator (para. 3-15).
STEP 2.
Check to see if lubricating oil pump signal orifice is restricted or
plugged.
Clean signal line orifice (para. 3-22).
STEP 3.
Check for broken oil transfer to suction tube.
Remove and inspect oil pan, tubes, and fittings (para. 3-21).
STEP 4.
Check for lubricating oil pump malfunction.
Repair or replace pump as required (para. 3-22).
5.
High lubricating oil pressure.
STEP 1.
Check to see if main oil pressure regulator is malfunctioning on the
lube oil cooler/filter.
Clean or replace pressure regulator (para. 3-15).
6.
Coolant in the lubricating oil.
STEP 1.
Check for malfunctioning oil cooler.
Inspect oil cooler (para. 3-15).
7.
Excessive lubricating oil consumption.
STEP 1.
Check to see if piston rings are worn, broken, or not properly seated.
a. Refer to engine blowby checks in Table 2-2, Malfunction 16, Step 2.
3-4
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