Hi-Low Speed Function Specifications - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
(3) Hi-Low speed function
Trouble
Machine turns during traveling.
Piston speed will not
between two stages.
Possible Cause
Spool does not switch.
1)Foreign matter exists between the
spool and the valve body.
2) Spring is not set properly.
3) Spring is damaged or broken.
Hydraulic oil leaks due to abnormal
abrasion of the 2-stage speed con-
trol piston.
2-stage speed control piston is not
set properly.
Foreign matter existing between the
2-stage speed control piston at the
right side and the valve body blocks
motion of the piston.
Abnormal abrasion of steel ball.
switch Foreign matter existing between the
2-stage speed control spool and the
valve body blocks motion of the
spool.
Foreign matter existing between the
2-stage speed control piston and
the valve body blocks motion of the
piston.
Hydraulic oil leaks due to abnormal
abrasion of the 2-stage speed con-
trol piston.
Orifice of the 2-stage speed control
signal passage is clogged.
IV-S-20
Remedy
Remove foreign matter completely.
Repair damaged part and
assemble it after cleaning. If the
damage and leakage are severe,
replace the part.
Set the spring at proper position.
Replace the spring. Remove foreign
matter completely. Repair damaged
part and re-assemble it after clean-
ing.
Replace the 2-stage speed control
piston. Remove foreign matter com-
pletely. Repair damaged part and
re-assemble it after cleaning.
Set the 2-stage speed control piston
at proper position.
Remove foreign matter completely.
Repair damaged part and
assemble it after cleaning. If the
damage and leakage are severe,
replace the part.
Replace the steel ball. Remove for-
eign matter completely. Repair dam-
aged part and re-assemble it after
cleaning.
Remove foreign matter completely.
Repair damaged part and
assemble it after cleaning. If the
damage and leakage are severe,
replace the part.
Remove foreign matter completely.
Repair damaged part and
assemble it after cleaning. If the
damage and leakage are severe,
replace the part.
Replace the 2-stage speed control
piston. Remove foreign matter com-
pletely. Repair damaged part and
re-assemble it after cleaning.
Remove foreign matter completely.
Hydraulic system
re-
re-
re-
re-