DAF CF65, CF75, CF85 Series . Manual - part 1021

©

 200424

1-1

General

SINGLE REAR AXLE 1339

ΧΦ65/75/85 series

8

3

1. GENERAL

1.1 DESCRIPTION

Differential
The differential has a hypoid bevel gear.

A single reduction is applied.

The bevel gear-to-pinion backlash is achieved 

using adjusting nuts.

The pinion housing can be removed using jacking 

screws.

The pinion bearing is adjusted using shims which 

are placed between the inner bearing races.

Differential lock
The differential is equipped with a variable 

differential lock.

The right side of the satellite-gear housing flange 

is fitted with spline toothing. The left side of the 

selector sleeve is equipped with similar toothing.

The selector sleeve is fitted with splines, similar 

to the splines in the axle shaft.

The outside of the selector sleeve is fitted with a 

groove, in which a fork fits which is attached to 

the engaging cylinder.

If the engaging cylinder is pressurised using a 

pneumatic switch, the toothing of the selector 

sleeve will mesh with the toothing of the satellite-

gear housing.

If the engaging cylinder is vented via the 

pneumatic switch, the spring will ensure that the 

lock is deactivated.

Wheel hub unit
The wheel hub, wheel bearings in compact 

version and hub oil seal form a unit, also called 

the wheel hub unit (3).

The thrust washer (2) installed between the hub 

nut (1) and wheel bearing, is fitted with two 

straight surfaces on the inside to prevent the 

washer from turning. This is to prevent the hub 

nut (1) from loosening in case of wheel bearing 

problems. The hub nut (1) is of the self-locking 

type. The nut is locked by bending the lips on the 

hub nut outward.

The wheel bearings of the wheel hub unit are 

greased and are maintenance free.

The correct wheel bearing pre-load is achieved 

by installing the hub nut as specified.

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A8 00 356

SINGLE REAR AXLE 1339

1-2

©

 200424

General

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ΧΦ65/75/85 series

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1.2 OVERVIEW DRAWING, WHEEL HUB UNIT

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A8 00 341

1.

Axle shaft

2.

Hub nut

3.

Thrust washer

4.

Compact bearings

5.

Hub

6.

O-ring

7.

Axle journal

©

 200424

2-1

Inspection and adjustment

SINGLE REAR AXLE 1339

ΧΦ65/75/85 series

8

3

2. INSPECTION AND ADJUSTMENT

2.1 CHECKING THE DIFFERENTIAL OIL LEVEL

To prevent skin injury, avoid 

unnecessary contact with the 

drained oil.

1.

Position the vehicle on a level surface.

2.

Lower the trailing axle, if present, on a leaf-

sprung version.

3.

Remove the oil-level check/filler plug (A). 

The oil level should reach the level check/

filler opening.

4.

Fit the plug using the special tool 

(DAF no. 1329493) and tighten the plug to 

the specified tightening torque. See 

"Technical data".

}

M8013

A

B

SINGLE REAR AXLE 1339

2-2

©

 200424

Inspection and adjustment

3

ΧΦ65/75/85 series

8

2.2 CHECKING THE OPERATION OF THE DIFFERENTIAL LOCK

1.

Jack up the rear axle and support the axle on 

stands.

2.

Bring the air system to operating pressure.

3.

Engage the differential lock. The warning 

lamp should now come on.

4.

Check that there is a "rigid" connection 

between the driven wheels.

5.

Disengage the differential lock. The warning 

lamp should not light up and the "rigid" 

connection between the driven wheels 

should be broken.

2.3 CHECKING THE WHEEL SPEED SENSOR RING

1.

Remove the wheel hub unit.

2.

Check the sensor ring (2) for deposits. 

Special attention should be paid to deposits 

between the teeth of the sensor ring.

Clean the sensor ring if necessary.

3.

Check the sensor ring (2) for damage. Even 

the slightest damage can cause a failure.

If necessary replace the sensor ring.

4.

If possible, the sensor ring (2) should be 

checked for the maximum admissible axial 

end play. See "Technical data".

5.

Check the sensor (1) for freedom of 

movement.

If necessary, clean the sensor (1) and apply 

new grease.

1

2

A8 00 342