TM 5-3895-370-14&P
Table 5-4. Direct And General Support Troubleshooting Procedures - CONT.
Malfunction
Test or inspection
Corrective action
ENGINE (CONT)
Step 2. Check oil cooler for leaks (para 5-27).
If oil cooler leaks at 70 psi (483 kPa), replace oil cooler.
If oil cooler does not leak at 70 psi (483 kPa), go to step 3.
Step 3. Inspect cylinder head for cracks and gasket deterioration.
If cylinder head is cracked or gasket is deteriorated, replace cylinder head and gasket.
If cylinder head is not cracked and gasket not deteriorated, replace and repair cylinder block
(para 5-63).
12.
ENGINE OIL PRESSURE TOO LOW.
Step 1. Inspect engine block for damaged or missing cup plugs.
If any cup plugs are damaged or missing, replace cup plug(s) (para 5-63).
If cup plugs are not damaged or missing, go to step 2.
Step 2. Inspect oil pressure regulator valve in oil filter head (para 5-27).
If valve spring or plunger are damaged or restricted, replace valve spring and/or plunger.
If valve spring and plunger are not damaged, go to step 3.
Step 3. Inspect oil sump tube for looseness and damage (para 5-28).
If oil sump tube is loose or damaged, tighten or replace sump tube.
If oil sump tube is not loose or damaged, go to step 4.
Step 4. Inspect engine oil lube pump backlash (para 5-29).
If pump backlash measurements are not 0.003 to 0.013 in. (0.076 to 0.330 mm), replace lube
pump.
If pump backlash measurements are 0.003 to 0.013 in. (0.076 to 0.330 mm), go to step 5.
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