Kubota WSM 05-E4B Series User Manual

Symptom
Probable cause and checking
procedure
Solution
Refer-
ence
page
The output is deficient 5. There is compression leakage Check the compression pressure
and repair
4-17
6. The air cleaner is dirty or clog-
ged
Clean or replace the element 3-8
3-15
The lubricant oil consumption is
too much
1. The gap of the piston ring
points to the same direction
Move the ring gap direction 4-41
2. The oil ring is worn out or can-
not move
Replace the oil ring or piston as-
sembly
4-62
4-64
4-41
3. The piston ring groove is worn
out
Replace the piston and piston
ring
4-62
4-64
4-41
4. The valve stem and valve
guide are worn out
Replace 4-52
4-53
5. The crankshaft bearing and
the crankpin bearing is worn out
Replace 4-65
4-66
4-68
6. Oil is leaking due to damaged
seals or packing
Replace －
The fuel is mixed into the lubri-
cant oil
1. The plunger of injection pump
is worn out
Repair or replace 4-22
4-38
2. Deficient nozzle injection Repair or replace the nozzle 4-25
4-32
3. The injection pump is dam-
aged
Replace 4-22
4-38
Water is mixed into the lubricant
oil
1. The head gasket is damaged Replace 4-34
2. The crankcase or cylinder
head is damaged
Replace 4-34
The oil pressure is low 1. The engine oil is not sufficient Fill oil to the specified amount 3-6
2. The oil strainer is clogged Clean 4-40
3. The relief valve does not oper-
ate with dirt
Clean －
4. The relief valve spring is weak
or damaged
Replace －
5. The oil clearance of the bear-
ings are too much
Replace the metal, bushing or
shaft
4-44
4-44
4-45
6. Excessive oil clearance of
crankshaft bearing
Replace 4-45
7. Excessive oil clearance of
crankpin bearing
Replace 4-44
4-44
(Continued)
SERVICING
1. Troubleshooting 4. ENGINE
05-E4B SERIES,05-E4BG SERIES
4-7
KiSC issued 03, 2023 A

Kubota WSM 05-E4B Series Specifications

General

Brand	Kubota
Model	WSM 05-E4B Series
Category	Engine
Language	English