DAF CF65, CF75, CF85 Series . Manual — part 1108

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200448

2-3

Inspection and adjustment

REAR AXLE ALIGNMENT

ΧΦ65/75/85 series

9

6

3.

From the small circle between the wheels

(on the vehicle centreline), draw a straight

line to the test reading scales at the side of

the wheel. This should be done for both

wheels (drawing 3).

The axle (mis)alignment relative to the

vehicle centreline is now visible.

4.

To realign the axle in this example, it would

have to be rotated 3 mm/m to the right

(drawing 4).

Drawing 3

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3

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Drawing 4

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3mm/m

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REAR AXLE ALIGNMENT

2-4

©

200448

Inspection and adjustment

6

ΧΦ65/75/85 series

9

Example 2
1.

Mark the test readings in the scales at the top

and side of the measured wheel. In the

example (drawing 5) the misalignment has

been determined as a 3 mm/m toe-in in

relation to the vehicle centreline for the left

wheel and a 1 mm/m toe-out in relation to the

vehicle centreline for the right wheel.

2.

From the small circle at the bottom of the

wheel, draw a straight line to the test reading

indicated on the wheel top scale. This should

be done for both wheels (drawing 6).

The (mis)alignment of the wheels relative to

the vehicle centreline is now visible.

3.

From the small circle between the wheels

(on the vehicle centreline), draw a straight

line to the test reading scales at the side of

the wheel. This should be done for both

wheels (drawing 7). The axle (mis)alignment

relative to the vehicle centreline is now

visible. From the figure it becomes apparent

that this axle is not entirely straight. The

wheels of this axle have a 2 mm/m toe-in

relative to one another.

Drawing 5

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Drawing 6

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Drawing 7

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©

200448

2-5

Inspection and adjustment

REAR AXLE ALIGNMENT

ΧΦ65/75/85 series

9

6

4.

Divide the total toe-in equally over the two

wheels. The toe-in per wheel would be 1 mm/

m. Mark these values on the top scales

(drawing 8).

5.

From the small circle at the bottom of the

wheels, draw straight dotted lines to the 1

mm/m markings on the scales (drawing 8).

6.

From the small circle between the wheels

draw a straight dotted line to the 1 mm/m

marking on the scale at the side of the wheel.

This should be done for both wheels

(drawing 9).

The ideal position of the axle is now made

visible by the dotted lines (drawing 9).

7.

To realign the axle in this example, it would

have to be rotated 2 mm/m to the left

(drawing 10).

Drawing 8

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Drawing 9

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Drawing 10

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2mm/m

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REAR AXLE ALIGNMENT

2-6

©

200448

Inspection and adjustment

6

ΧΦ65/75/85 series

9

Example 3
This example refers to a vehicle with two rear

axles.

1.

The adjacent drawing shows the axles of the

previous two examples. The positions of the

two axles relative to the vehicle centreline

have already been determined.

2.

The necessary realignment value (in mm/m)

for the two axles is also the misalignment

value relative 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 circles in the centre of the left

wheels, draw straight lines to the markings

on the scale (drawing 12). The position of the

two axles relative to each other is now

visible. With this, it can be determined

whether the axles need realigning, and

which one needs realigning.

Any adjustment necessary can also be

indicated as a dotted line in the figure.

Note:

Quite often, it is only necessary to realign

one of the axles to get both axles positioned

parallel to each other (within the permitted

tolerance limits).

4.

The non-parallelism in this example is 5 mm/

m. In this case, it is therefore sufficient to

reposition only the front axle.

Note:

The method of repositioning the axle

depends on the type of axle suspension.

Drawing 11

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2mm/m

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3mm/m

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Drawing 12

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