b)
Control unit : ’
The contra! unit located below the steering wheel, consists of a distributor slide-valve ( C ) which. when
hydraulic pressure on either side of it is the same
ensures in chamber 1 the necessary pressure for the
steerinq piston
Movement of rockers E when turning
to the riqht
F
E
D
C
Return to reservoir
HP
QV
re
Wh <‘,I s I? cw%g .’
Within permitted clearance (1 J ):,
shaft A rotates pinion F Pinion B and pinion D are then in mesh f NII~/ nl(,<.l1~)ji(nll>~
lillk cd lo II1 1’ ~/~~c,~i/lg /~ir/io/l 1. Rockers E tilt, and cause slide-valve C to move.along its bore
_ Upward movement : Chamber 1 of hydraulic ram supplied in HP
- Downward movement Chamber 1 of hydraulic ram linked to the return to the reservoir
lic,Inr~i lo fm.silio~i 0 I ~~yiiilihrif~vf
Movement of rack causes movement of its control pinion. pinion B and pinion D Pinion F being then locked in posi-
tion, pinion D acts on rockers E. which in turn brinq back slide-valve C to its position of equilibrium.
NOTES :
1) Manual operation is ensured by shaft A being mechanically connected to pinion B after cancellation of clearance
a J )).
2) The steering rack is hydraulically locked for any steering position, which ensures great directional stability of
the vehicle.
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