The hydraulic steering-lock limitation is pre-adjusted on the test bench
before leaving the manufacturer. For practical reasons, fine adjustment
takes place when the steering gear is installed with the vehicle at rest.
The procedure is as follows:
Vehicle carrying normal load, steered wheels not raised clear of the ground, engine running. Turn
steering wheel to right until full lock is almost applied (if necessary, use a spacer of 2 - 3 mm in
thickness) (Fig. 4). Switch off engine and release steering wheel (steering will return to neutral
position, the steering wheel turning through approximately 1/4 of a turn).
With the engine at a standstill (with the engine running, the oil is under line pressure), remove the
lower stud bolt (b1) and by turning the adjuster ring (b2) through the threaded hole in the
intermediate flange (92), bring the protruding stops of all the rings into contact with each other. In
this position, turn the steering wheel back until the stud bolt can be screwed into the next radial hole
in the adjuster ring. Tighten the stud bolt. Refer to Technical Data for tightening torque.
Start the engine and carry out the adjustment in the same way for the left-hand lock. In this case, it
is the upper stud bolt (a1) which must be removed with the engine switched off.
Finish by checking the settings on both sides and correct if necessary.
Turn the lower adjuster ring anticlockwise with right-hand lock applied and turn the upper adjuster
ring clockwise with left-hand lock applied. If such a procedure appears beneficial, the upper adjuster
ring can be used for right-hand lock and the lower adjuster ring for left hand lock. Invariably,
however, the adjuster rings have to be turned as far as they will go in the direction opposite to that
in which the steering wheel is turned.
With the vehicle carrying its normal load, motionless with the engine running, steered wheels not
raised clear of the ground, turn the steering until full lock is applied in one direction. There should
now be a space of 1 - 3 mm between the full-lock stop components, corresponding to a wheel lock
of approximately 20 to 30 degrees.