Kubota D1503-M-DI Workshop Manual page 27

03-M-DI Series, WSM
Symptom
Either White or Blue
Exhaust Gas Is
Observed
Oil Leak into Exhaust
Pipe or Suction Pipe
Either Black or Dark
Gray Exhaust Gas Is
Observed
Deficient Output
Excessive Lubricant
Oil Consumption
Fuel Mixed into
Lubricant Oil
Water Mixed into
Lubricant Oil
Probable Cause
• Excessive engine oil
• Piston ring and liner worn or stuck
• Incorrect injection timing
• Deficient compression
• Waste oil pipe clogged or deformed
• Piston ring seal faulty
• Overload
• Low grade fuel used
• Fuel filter clogged
• Air cleaner clogged
• Deficient nozzle injection
• Incorrect injection timing
• Engine's moving parts seem to be seizing
• Injection pump malfunctioning
• Deficient nozzle injection
• Compression leak
• Gas leak from exhaust system
• Air leak from compressor discharge side
• Air cleaner dirty or clogged
• Compressor wheel turning heavily
• Piston ring's gap facing the same direction
• Oil ring worn or stuck
• 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
• Injection pump's plunger worn
• Deficient nozzle injection
• Injection pump broken
• Head gasket defective
• Cylinder block or cylinder head flawed
Reduce to specified
level
Repair or replace
Adjust
Check the cylinder
compression
pressure and top
clearance
Repair or replace
Replace the
turbocharger
assembly
Lessen load
Use specified fuel
Clean or change
Clean or change
Replace nozzle
Adjust
Repair or replace
Replace
Replace nozzle
Check the
compression
pressure and repair
Repair or replace
Repair or replace
Clean or replace
Replace the
turbocharger
assembly
Shift ring gap
direction
Replace
Replace piston
Replace
Replace
Replace
Replace injection
pump
Replace nozzle
Replace
Replace
Replace
S-6
DIESEL ENGINE
Reference
Solution
Page
S-19
S-42, 56,
57, 71, 72,
79
S-86
S-42
–
S-101
–
–
S-21, 25
S-21
S-88
S-86
–
S-49
S-88
S-42
S-101
S-101
S-24
S-101
S-56
S-56, 71,
72
S-56, 71,
72
S-48, 62,
63
–
–
S-49
S-88
S-49
S-46, 47
S-46, 61
W1014322
KiSC issued 10, 2009 A