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4. Low oil pressure
Normal
Normal Too high
Normal
Normal Adjust or replace
Check if oil pressure gauge
indicates exactly
Check cooling water temperature
Too low
Refill with recommanded oil
Check oil quality Refer to ‘Engine overheating’
Check oil pressure relief valve Water, fuel, etc. mixed in oil
Overhaul engine or injection pump
Inadequate
Replace with suggested lub. oil
Overhaul the engine
Check oil level
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