Deficient Output; Excessive Lubricant Oil Consumption; Fuel Mixed Into Lubricant Oil; Low Oil Pressure - Kubota B2410 Workshop Manual

1 ENGINE
82410 • 82710 • 82910 W8M, 12271
Symptom
Probable Cause Solution
Reference
Page
Either Black or Dark
• Overload
Lessen load
-
Gray Exhaust Gas Is
• Low grade fuel used
Use specified fuel G-8
Observed
• Fuel filter clogged
Replace G-20
• Air cleaner clogged
Clean or replace G-20
• Deficient nozzle injection Repair or replace 1-856
nozzle
Deficient Output
• Incorrect injection timing
Adjust 1-853
• Engine's moving parts seem to be seizing
Repair or replace
-
• Uneven fuel injection
Repair or replace 1-824
injection pump
• Deficient nozzle injection
Repair or replace 1-856
nozzle
• Compression leak
Replace head 1-820
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
Excessive Lubricant • Piston ring's gap facing the same direction 8hift ring gap 1-829
Oil Consumption
direction
• Oil ring worn or stuck
Replace 1-829
• Piston ring groove worn
Replace piston 1-829
• Valve stem and valve guide worn
Replace 1-832
• Oil leaking due to defective seals or packing Replace -
Fuel Mixed into • Injection pump's plunger worn Replace pump 1-824
Lubricant Oil
element or injection
pump
• Deficient nozzle injection
Repair or replace 1-856
nozzle
• Injection pump broken
Replace 1-824
Water Mixed into
• Head gasket defective
Replace 1-820
Lubricant Oil • Cylinder block or cylinder head flawed Replace
1-820
Low Oil Pressure • Engine oil insufficient Replenish
G-8
• Oil strainer clogged
Clean
1-827
• Oil filter cartridge clogged
Replace G-12
• Relief valve stuck with dirt
Clean
-
• Relief valve spring weaken or broken
Replace
-
• Excessive oil clearance of crankshaft bearing
Replace 1-845
• Excessive oil clearance of crankpin bearing Replace 1-844
• Excessive oil clearance of rocker arm Replace 1-835
• Oil passage clogged
Clean -
• Different type of oil
Use specified type of G-8
oil
• Oil pump defective
Repair or replace 1-849
High Oil Pressure
• Different type of oil
Use specified type of
G-8
oil
• Relief valve defective
Replace
-
12271810020
1-82