Subaru XT 1988 Service Manual page 565

AUTOMATIC TRANSMISSION AND DIFFERENTIAL
(4) Line-pressure Control
CD
Ordinary line-pressure control and starting control
Control piston
(moves on the fulcrum in
the direction of the arrow
by feedback pressure to
move cam ring)
,"
----
--
....
------,
Cam ring
(moves on the fulcrum in
the direction of the arrow
I
I
I
I
by control piston to change
the amount of eccentricity X
with respect to rotor)
Fulcrum
x
-
-
Fig. 71
Oil pan
Rotor
(engages with oil pump drive shaft
and turns in response to engine speed)
51
~
Feedback pressure
o
Line pressure
r
Torque converter oil pressure
Pressure regulator valve
l
Throttle pressure
Line pressure
x
AfT
control
unit
ATF temperature sensor
Range signal
Vehicle speed
Throttle position
3-2
L3-932