Kubota M5040 Workshop Manual page 128

M5040, M6040, M7040, WSM
Symptom
Engine Revolution Is
Not Smooth
Either White or Blue
Exhaust Gas Is
Observed
Either Black or Dark
Gray Exhaust Gas Is
Observed
Deficient Output
Excessive Lubricant
Oil Consumption
Probable Cause
Fuel filter clogged or dirty
Air cleaner clogged
Fuel leak due to loose injection pipe retaining nut
Injection pump malfunctioning
Incorrect nozzle opening pressure
Injection nozzle stuck or clogged
Governor malfunctioning
Excessive engine oil
Piston ring and cylinder worn or stuck
Incorrect injection timing
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
Air cleaner dirty or clogged
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
Replace
Clean or replace
Tighten retaining nut
Repair or replace
Repair or replace
Repair or replace
Repair
Reduce to specified
level
Repair or replace
Adjust
Reduce the load
Use specified fuel
Replace
Clean or replace
Repair or replace
nozzle
Adjust
Repair or replace
Repair or replace
Repair or replace
nozzle
Check the
compression
pressure and repair
Clean or replace
Shift ring gap
direction
Replace
Replace piston
Replace
Replace
Replace
1-S2
ENGINE
Reference
Solution
Page
G-30
G-23
1-S28
1-S20, 40,
41, 42
1-S21, 28
1-S21, 28
1-S35, 36
G-17, 18
1-S48, 49,
66, 71
1-S19
–
G-10
G-30
G-23
1-S21, 28
1-S19
–
1-S20, 40,
41, 42
1-S21, 28
1-S13, 28,
29, 30, 31,
32
G-23
1-S48, 49
1-S48, 49,
66
1-S48, 49,
66
1-S32, 54
1-S49, 50,
68, 69
–
W1014322
KiSC issued 06, 2008 A