7. Lubrication system
127
Failure Diagnosis
Lubrication
oil pressure
(kPa)
Idle speed Min. 100
Governed
speed
Min. 250
Max. oil temperature (°C)
120
Oil specifica-
tion
Oil class above API CD
SAE 15W/40
Item
DP222L
Remarks
DP222LAS DP222LBS DP222LBF DP222LCS DP222LCF
Phenomenon Causes Troubleshooting
Too much oil consumption
Bad oil Replace oil with specified oil.
Oil leakage from the oil seal ring and packing part Replace it
Worn or damaged piston and piston ring Replace it
Worn cylinder liner Replace it
Burnt piston ring Replace it
Worn valve guide oil seal, valve guide, or valve
stem
Replace it
Low oil pressure
Bad oil Replace oil with specified oil.
Burnt oil pump relief valve Replace it
Clogged oil pump strainer Cleanse the strainer
Worn oil pump gear Replace it
Cracked oil delivery pipe of the oil pump Replace it
Defect oil pump Repair or replace it
Oil pressure gauge fault Repair or replace it
Worn bearings Replace it
Contaminated oil
Clogged oil filter
Replace the oil filter with a new
one
Gas leakage Replace piston ring with a new one
Bad oil Replace oil with specified oil.
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