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2-4
CONTROL FUNCTIONS
Shifting
flow line
A
Piston for P3 shift
P3
Flow Q
Qmax
Total pressure
Piston
Swash plate
Spring
2)
The delivery pressure P1 and P2 are directed to the piston which slides on the swash plate and
acts on the swash plate.
The spring is provided to act against the delivery pressure.
When the oil pressure via piston acting on the swash plate is less than the installation load of the
spring the swash plate is fixed to the maximum tilting position.
When the oil pressure via piston acting on the swash plate exceeds the installation load of the
spring the swash plate is tilted and kept tilted at a position where the oil pressure is balanced with
the spring force.(Region A in above figure)
When the P3 oil pressure act on the shaft piston, the control shifting line is shifted.
R35Z72MP04
Į
P
Į
P1