Kubota KX080-4 Workshop Manual page 460

KX080-4, WSM
Problem and/or
Situation
Not cooling effectively
(low-pressure level too
low)
Not cooling effectively
(both low and high
pressure levels too
high)
Not cooling effectively
(both low and high
pressure levels too
low)
Cannot control
temperature
(servo motor and/or
temperature control
dial defective)
Cannot control the
temperature
(hot water valve does
not open normally)
Cannot control the
temperature
(poor heater hose
layout)
Water leak (water leak
inside the cab)
Wiper
Problem and/or
Situation
Wiper doesn't work
Wiper moves too
slowly
Wiper fails to stop in
the correct position
Possible Cause
Not enough refrigerant
Frost on the evaporator
Error in the low-pressure line
(cracked or clogged)
Expansion valve clogged
Refrigerant overcharged
Not enough refrigerant
Servo motor broken
Temperature control dial broken
Controller of the wire harness is off
Servo motor broken
Hot water valve damaged
Heater hose is pinched
Heater hose is bent or broken
Drain hose bent or broken
Drain hose clogged
Possible Cause
Fuse blown (a part inside the wiper motor or
some other moving part is shorted or burned out)
Wiper motor faulty (damaged armature, worn
motor brushes, motor shaft locked)
Wiper switch faulty
Faulty operation of linkage mechanism due to
foreign matter
Wiper arm locked or rusted together
Wiper motor faulty (damaged armature, poor
contact due to worn motor brushes, faulty
operation of motor shaft)
Battery voltage low
Wiper arm shaft rusty, foreign matter stuck in it
Poor contact in wiper switch
Wiper motor faulty
(Dirty or poor contact of the contacts at the
auto-stop position due to foreign matter)
Check with a manifold gauge
Clean or replace
Replace
Replace
Check with a manifold gauge
Check with a manifold gauge
Replace
Replace
Repair or replace
Replace
Replace
Fix
Repair or replace
Check and repair
Clean
Pinpoint the cause of the damage
and replace
Replace
Replace
Fix
Grease up or replace
Replace
Recharge or replace
Grease up or replace
Replace
Replace
5-S3
CABIN
Solution
Solution
RY9212001CAS0001US0
KiSC issued 08, 2015 A