Ls Control Pressure - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
k. LS control pressure
The actual measurement of LS control differential pressure requires special equipment such as a dif-
ferential pressure instrument. General maintenance shops do not have such a expertise measuring
device. This section introduces a simple method that makes use of the swivel motion or travel opera-
tion. of an actual machine.
1)
2)
1. Place the machine on hard ground.
2. Warm up the machine to the oil temp. of 50 ± 5 °C
(122 ± 9 °F).
3. Raise up the engine speed at Max. rpm.
4. Measure the time for three turns constant swivel
function
Reference value : See Specifications
Machine condition : In case of swivel speed test
Boom raised, arm & bucket crowd
Dozer-down on ground.
5. Adjustment
1) If actual measurement speed is slower than
specification, loosen the lock nut and screw in
the set screw.
2) If actual measurement speed is faster than
specification, loosen the lock nut and screw
back the set screw.
Note:Before loosening the nut, put alignment mark
on body, lock nut and set screw.
1) LS control valve
2) Set screw
IV-S-51
Hydraulic system