High-Speed Stage - Kubota KX080-3 Workshop Manual

WSM KX080-3 Mechanism

2. High-speed stage

At the high-speed stage, the pilot pressure of over 1.96 MPs (20 kgf/cm
such state, the spool (371) surpasses the force of spring (381) and is pushed to the right. The pressure
oil at port F is then introduced through the spool (371) into the chamber S.
The pressure oil in the chamber S makes the thrust of piston (161) high. The piston (161) pushes up the
swash-plate (103) until it comes into contact with the face X. The swash-plate (103) stays in this position
at the maximum tilt angle of 2.
In other words, the hydraulic motor comes to its minimum cylinder capacity and runs at the high speed.
(381)
(371) (103)
(423)
(425)
IV-M-107
2
) is supplied from the port P. In
(421)
(422)
(161)
(424)
IV Hydraulic System
(103)Swash plate
(161)Piston
(371)Spool
(381)Spring
(421)Spindle
(422)Chamber S
(423)Support
(424)Face X
(425)Motor case