Troubleshooting
Fig. 29
Tool [4]
Fig. 30
42 Instructions on Design, Operation, Maintenance and Inspection
1.6.7 Checking the steering gear play
P
rerequisite for the test described below:
The transmission parts between the steering
wheel and the road wheel must be free from
play.
Versions with leaf spring:
Lock the LH front wheel (the RH front wheel
if the vehicle is RH steered) in the straight
ahead driving position by fitting tool [4] be-
tween the wheel rim (rear and front) and the
front spring (Fig. 29).
Attention:
Do not exert any pressures in excess of those
mentioned below on the tools and the wheel
rim in order to avoid damages to the wheel
rim.
Versions with single-wheel suspension:
Lock the LH front wheel (the RH front wheel if the vehicle is RH steered) as per vehicle manufac-
turer’s instructions.
Put tool [2] on the steering wheel and attach the pointer to the dashboard or to the wind-
screen (Fig. 30).
Raise the engine speed to approx. 1000
r.p.m..
Read the idle pressure at tool [1] (ZF Servot-
est/pressure gauge).
Rotate the steering wheel to the left until a
pressure of 1 bar above idle pressure is indi-
cated.
On tool [2] read the dial value.
Rotate the steering wheel to the right until a
pressure of 1 bar above idle pressure is indi-
cated.
On tool [2] read the dial value.
Calculate the total travel covered.
Specified value: max. 50 mm (steering wheel
Ø 500 mm)
For versions with bevel box:
Specified value: max. 55 mm (steering wheel
Ø 500 mm)
If the maximum value is exceeded, check the play of the steering column and, if required, repair
or replace the steering gear.
Remove tool [1] (ZF Servotest)/the pressure gauge.
Check the oil level and bleed the steering system - see Chapter III.
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