Unit Maintenance Troubleshooting
TEST OR INSPECTION
7. LOW ENGINE OIL PRESSURE
Step 1. Shut down engine and check oil system for leaks. Check rocker lever cover and oil drain assembly for leaks.
Check for damaged and leaking oil lines and fittings. Check inside control panel cover assembly for
evidence of leakage from oil pressure indicator or oil pressure line hose. Check lube oil cooler for leaks.
Examine area of crankcase directly below lube oil cooler. If leaks cannot be easily detected and engine can
be run without damage, clean the engine as described below. After engine is clean, start the engine and
observe lubrication system for leaks.
Death or serious injury could occur if compressed air is directed against the skin. Do not
use compressed air for cleaning or drying unless the pressure is/has been reduced to 30
psi (2.11 kgcm 2) or less. When working with compressed air always use chip guards,
eye protection, and other personal protection equipment.
Remove accumulated dust and dirt with compressed air.
Tighten loose components. Replace leaking components (para 2-52) and start engine. If cover, front
cover, or associated surfaces, other than fittings or fasteners, are leaking, notify direct support
CHARGING INDICATOR LAMP (ALTERNATOR) LIGHTS WHEN ENGINE IS RUNNING
Step 1. Check for weak batteries or dirty, corroded, or loose battery cable connections.
Add distilled water as needed. Recharge batteries or replace if defective (para 2-27).
Step 2. Check V-belts for breaks or damage. Check belt tension. Check for damaged or frozen pulleys (para 2-48).
Tighten or replace V-belts as necessary (para 2-41).
Step 3. Check alternator.
Test/inspect alternator, replace alternator as required (para 2-42).
PUMP MAKES EXCESSIVE NOISE
Step 1. Check that suction and discharge valves are open.
Relocate suction hose connection below surface of liquid. Keep suction intake off of bottom when
pumping (refer to TM 10-4320-307-10).
Step 2. Check suction pipe, connections, or parting surface of suction flange for leaks.
Step 3. Check engine RPM. High RPM will cause pump cavitation.
Reduce engine speed to meet suction capability.