DAF 95XF. Manual — part 785

9

REAR AXLE ALIGNMENT

Inspection and adjustment

2-6

Example 3
This example refers to a vehicle with two rear
axles.

1.

The adjacent illustration shows the axles
from the previous examples. The positions
of the two axles in relation to the vehicle
centreline have already been determined.

2.

The angle (in mm/m) through which the
axles should have to be rotated in order for
them to be realigned in relation to the
vehicle centreline, corresponds with the
misalignment in relation to the vehicle
centreline.
Enter these values in the scale of the figure
at the bottom of drawing 11. Take care to
enter this value on the correct side (+ or
-- side) of the vehicle centreline indicated in
this drawing.

3.

From the small circle in the left wheels,
draw a straight line to the values on the
scale (illustration 12).
The position of the two axles in relation to
each other is now visible. It can now be
determined whether realigning is required
and which axle must be realigned.

If necessary, the required realignment can
also be indicated as a dotted line in the
figure.

Note:

Often it is only necessary to realign one of
the axles to ensure that the non-parallelism
of both axles in relation to each other is
within the permitted tolerance limits.

4.

The non-parallelism in this example is
5 mm/m. In this case it is therefore
sufficient to realign the front axle only.

Note:

The realignment option depends on the
type of axle suspension.

-

+

+

-

-

+

+

-

1

1

3

3

2mm/m

1

1

1

1

-

+

+

-

-

+

+

-

3

3

3

3

3mm/m

3

2

Afb. 11

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3

2

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Afb. 12

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9

Inspection and adjustment

REAR AXLE ALIGNMENT

2-7

Measurement report

-

+

+

-

-

+

+

-

-

+

+

-

-

+

+

-

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9

REAR AXLE ALIGNMENT

Inspection and adjustment

2-8

Adjusting the position of the air-sprung
axle(s) and tandem axle suspension
-

The misalignment of the axle can be
corrected by inserting a hardened steel ring
(DAF no. 0202838) between the torque rod
and the torque rod bracket. This ring is
3 mm thick. If necessary, grind down the
ring. It is not allowed to use more than 1
ring per bolt. The use of several rings would
increase the risk of a connection coming
loose.

-

The thickness of this shim in millimetres
should be equal to the rear-axle
misalignment in mm/m.

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Adjusting the axle position (leaf-sprung
trailing axle suspension)
To allow correction of the misalignment of the
driven axle in relation to the trailing axle
(non-parallelism), the position of the driven axle
can be adjusted.

The position of the driven axle is determined by
a metal block (A) placed in a recess of the axle
seat.
This block contains a hole for the spring
assembly centre bolt. Replacing this block with
a block with the hole further to the front or the
rear will cause the entire axle to shift forward or
backward at that side.

A

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9

Inspection and adjustment

REAR AXLE ALIGNMENT

2-9

For correction purposes, blocks (B) without a
hole can be ordered under DAF-no. 0893145.
The hole must then be custom drilled in the
correct position.

1.

Have a block without a hole at hand.

2.

Determine the misalignment of the driven
axle in relation to the trailing axle in mm/m.

3.

This misalignment value corresponds with
the distance between the centre of the hole
to be drilled and the centre of the block
(distance L in the adjacent illustration).

4.

Very accurately drill a

∅ 17.5 mm hole in

the block in the correct place. Check the
distance.

5.

Remove the nuts from the U-bolts.

6.

Jack up the chassis until there is sufficient
clearance between the spring assembly and
the axle seat. Support the chassis in a safe
way.

7.

Remove the metal block which is now loose
in the axle seat.

8.

Place the new block in the axle seat,
making sure that the axle is realigned in the
correct direction.

9.

Fit the U-bolt nuts and tighten them to the
specified torque. See “Technical data”.

L

B

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