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1.6 TROUBLESHOOTING (Continued)
Symptom
Probable Cause Solution Reference
Excessive Lubricant
Oil Consumption
Piston ring’s gap facing the same direction
Oilringwornorstuck
Piston ring groove worn
Valve stem and valve guide worn
Crankshaft bearing, and crank pin bearing
worn
Oil leaking due to defective seals or packing
Shift ring gap
direction
Replace
Replace worn piston
Replace
Replace
Replace
2.2.6.a
2.3.3.d
2.3.3.e
2.3.1.d
2.3.4
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Fuel Mixed into
Lubricant Oil
Injection pump’s plunger worn
Deficient nozzle injection
Injection pump broken
Replace Injection
pump
Replace nozzle
Replace
5.1
5.2.3
5.1
Water Mixed into
Lubricant Oil
Head gasket defective
Cylinder block or cylinder head flawed
Replace
Replace
2.2.3.e
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Low Oil Pressure Engine oil level low
Oil strainer clogged
Relief valve stuck with dirt
Relief valve spring weak or broken
Excessive oil clearance of crankshaft bearing
Excessive oil clearance of crankpin bearing
Excessive oil clearance of rocker arm
Oil passage clogged
Incorrect oil type
Oil pump defective
Replenish
Clean
Clean
Replace
Replace
Replace
Replace
Clean
Use specified type of
oil
Repair or replace
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3.1.1
3.1.1
2.3.4.d
2.3.4.c
2.3.1.k
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3.2
High Oil Pressure Incorrect oil type
Relief valve defective
Use specified type of
oil
Replace
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3.1.1
Engine Overheated Engine oil level low
Fan belt broken or elongated
Coolant insufficient
Radiator net and radiator fin clogged with dust
Inside of radiator corroded
Coolant flow route corroded
Radiator cap defective
Overload running
Head gasket defective
Incorrect injection timing
Unsuitable fuel used
Replenish
Replace or adjust
Replenish
Clean
Clean or replace
Clean or replace
Replace
Loosen load
Replace
Adjust
Use specified fuel
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2.2.3.e
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Low Battery Charge Battery electrolyte level low
Fan belt slips
Wiring disconnected
Rectifier defective
Alternator defective
Battery defective
Replenish distilled
water and charge
Adjust belt tension or
change belt
Connect
Replace
Replace
Change
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