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
3
ΧΦ65/75/85 series
8
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
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