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DAF LF45, LF55 Series. Manual - part 504

LF45/55 series

Inspection and adjustment

STEERING BOX

3-3

Adjusting the wheel-deflection limiting
valves
There are three procedures for making
adjustments.

Procedure A, to be used if:
-

a new or overhauled steering box is fitted.

Procedure B, to be used if:
-

the wheel deflection has been increased.

Procedure C, to be used if:
-

the wheel deflection has been reduced.

the steering box input shaft was rotated to
the end stop before the steering box with
the steering rod was connected to the
steering gear.

Adjustment following procedure A
1.

Make sure that the attachment bolts of the
steering box and of the steering bracket are
tightened to the specified tightening
torques, see “Technical data”.

Check the wheel deflection of the front axle
before the steering rod is installed. If
necessary, the wheel deflection should be
adjusted using the wheel deflection stop
bolts on the swivel axles.

Install the steering rod.

Turn the steering wheel fully anticlockwise
and clockwise with the engine running. The
wheel deflection stop bolts or end stop
points must abut the axle housing for this
procedure.
If the maximum wheel deflection is not
reached, partially unload the front axle by
jacking it up so that the maximum wheel
deflection is reached. Never completely
unload the front axle when doing this.
The stop bolt sliding bushes are now
pushed further onto the stop bolts. This
gives the correct setting for the wheel
deflection limiting valves.

ᓻ 200322

STEERING BOX

Inspection and adjustment

LF45/55 series

3-4

Adjustment following procedure B
1.

The wheel deflection must be increased
using the wheel deflection stop bolts on the
swivel axles.

Turn the steering wheel fully anticlockwise
and clockwise with the engine running. The
wheel deflection stop bolts must abut the
axle housing for this procedure.
If the maximum wheel deflection is not
reached, partially unload the front axle by
jacking it up so that the maximum wheel
deflection is reached. Never completely
unload the front axle when doing this.
The stop bolt sliding bushes are now
pushed further onto the stop bolts. This
gives the correct setting for the wheel
deflection limiting valves.

ᓻ 200322

LF45/55 series

Inspection and adjustment

STEERING BOX

3-5

Adjustment following procedure C
1.

The wheel deflection must be reduced using
the stop bolts on the swivel axles.

Remove both stop bolts and replace them
with new ones.
Tighten the new stop bolts to the specified
tightening torque, see “Technical data”.
If the steering oil has not been drained,
place a tray under the steering box. When
the stop bolt is removed, steering oil will
come out of the opening.

Note:
The sliding bush of a used stop bolt musst
not be taken off the stop bolt and the stop
bolt re-fitted.

Fill and bleed in the case of an integrated
steering box and steering gear.

S7 00 620

ᓻ 200322

STEERING BOX

Inspection and adjustment

LF45/55 series

3-6

3.2 INSPECTING THE PRESSURE POINT

Inspecting the pressure point
1.

Drain the steering oil.

Take the steering rod off the pitman arm.

Note:
If a steering rod is removed, the input shaft
must not be rotated more than one turn
(starting from the central position).
Otherwise, the setting of the wheel
deflection limiting valves will be changed.

Place the sector shaft in the central
position, by aligning the marks on the sector
shaft and the steering box.

Take the universal joint off the input shaft.

If the vehicle has an airbag, use adhesive
tape or some other means to prevent the
steering wheel from turning.

If the steering wheel is rotated more
than 3 turns to the left or right from
the central position, this will
damage the airbag contact unit.

Check whether the sector shaft is still in the
central position, using the marks.

Fit a micrometer (A) to the
resistance-torque tester (ZF order number
8090 798 151).

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