chrysler technician manual

POWER STEERING - Pinion and Valve Assembly Construction 19-9
WHEN THE STEERING WHEEL IS TURNED TO
THE LEFT
JVhen the steering wheel is turned to the left, the
torsion bar is, as shown in the illustration, caused to
torque in the direction of turning to the left, with the
result that the input shaft rotates by the corresponding
amount to the left, and a rotational difference
between the input shaft and rotary valve develops.
The concave and convex parts of the input shaft and
rotary valve cause oil passageways L’ and R to
become constricted, with the result that, for the
fluid sent from the oil pump, the flow of fluid is
stopped from port “a” to port “d” and port “b”.
When this happens, the fluid flows from the oil
pump to sleeve “a”, port “a”, port “c” and sleeve
“c” and is sent to the cylinder tube left chamber,
thus causing the generation of a force to move the
rack in the rightward direction, thereby assisting the
steering effort of the steering wheel.
At the same time, the cylinder tube right chamber
fluid flows through sleeve “b”, port “b”, port “d”
and chamber “A”, and is returned to the oil
reservoir.
I
Port d
Oil pump
Oil reservoir
nber *
‘Y R
oil pump
V
To the left
cylinder tube
13LOO73
Sleeve
Sleeve c
Cylinder tube
left chamber
Cylinder tube
right chamber