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Group 8 - Rear Axle

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100% found this document useful (1 vote)

201 views278 pages

Group 8 - Rear Axle

Uploaded by

Enoc Arenas

We take content rights seriously. If you suspect this is your content, claim it here.

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Download as PDF, TXT or read online on Scribd

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8 STRUCTURE

ΧΦ65/75/85 series

TECHNICAL DATA
Structure

0
DIAGNOSTICS
1
SINGLE REAR AXLE 1132
2
SINGLE REAR AXLE 1339
3
SINGLE REAR AXLE 1347
4
SINGLE REAR AXLE 1354
5
TANDEM REAR AXLE 1132T
6
TANDEM REAR AXLE 1355T
7
TRAILING AXLES
8
HYDRAULIC LIFTING GEAR
9
09N044 LEADING REAR AXLE (FTP VEHICLE)
10

CONTENTS
0 Technical data

Page Date 0
1. SINGLE REAR AXLE 1132. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424
1.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424

2. SINGLE REAR AXLE 1339. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424
2.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424

3. SINGLE REAR AXLE 1347. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424

4. SINGLE REAR AXLE 1354. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424
4.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 . . . . . 200424
4.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 . . . . . 200424

5. TANDEM REAR AXLE 1132T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200424

5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200424
5.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 . . . . . 200424
5.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 . . . . . 200424

6. TANDEM REAR AXLE 1355T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200424

6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200424
6.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 . . . . . 200424
6.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 . . . . . 200424

7. TANDEM REAR AXLE RT40-145/MT21-144 . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200424

7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200424
7.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200424
7.3 Filling capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200424

8. TRAILING AXLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 . . . . . 200424

8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 . . . . . 200424
8.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2 . . . . . 200424

9. HYDRAULIC LIFTING GEAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 . . . . . 200424

9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 . . . . . 200424
9.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2 . . . . . 200424

10. 09N044 LEADING REAR AXLE (FTP VEHICLE). . . . . . . . . . . . . . . . . . . . . . . . 10-1 . . . . 200424

10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 . . . . 200424
10.2 Tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2 . . . . 200424

1. SINGLE REAR AXLE 1132

1.1 GENERAL 0
Sealant for differential
Mating surface and around bolt holes of axle
body Loctite 5910

Sealant for axle shaft

Mating surface of axle shaft flange Loctite 5910

Wheel speed sensor ring

Axial end play maximum 0.25 mm

Installation of wheel hub unit

Axle journal for installing the wheel hub unit treat-
ed with Gleitmo 805

Driven axle caster

FA model 4,5

1.2 TIGHTENING TORQUES

0 The tightening torques stated in this section are
different from the standard tightening torques
stated in the overview of the standard tightening
torques. The other threaded connections not
specified must therefore be tightened to the
torque stated in the overview of standard
tightening torques.
When attachment bolts and nuts are replaced, it
is important that - unless stated otherwise - these
bolts and nuts are of exactly the same length and
property class as those removed.

Differential
Drive flange attachment nut 1250 Nm(1)
Differential lock cover attachment bolts 30 Nm
Attachment bolts differential to axle housing 170 Nm(2)
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 262 to secure

(2) Apply Loctite 572

Hub
Hub nut(1)
1st phase 500 Nm
2nd phase turn the hub 10 revolutions at a speed of
approx. 40 rpm
3rd phase 550 Nm
4th phase turn the hub 10 revolutions at a speed of
approx. 40 rpm
5th phase 1300 Nm
Axle shaft attachment bolts 260 Nm

(1) Only fit a new hub nut

1.3 FILLING CAPACITIES

Differential Minimum caster Maximum caster

Filling capacity approx. 15.0 litres approx. 17.5 litres

2. SINGLE REAR AXLE 1339

2.1 GENERAL 0
Sealant for differential
Mating surface and around bolt holes of axle
body Loctite 5910

Sealant for axle shaft

Mating surface of axle shaft flange Loctite 5910

Wheel speed sensor ring

Axial end play maximum 0.25 mm
Driven axle caster
FAG 3,5
FAS (11/7 ratio)(1) 4
FAS (10/10 ratio)(1) 3,5
Other 4,5

(1) With a lowered trailing axle

Trailing axle lifting height

Leaf-sprung trailing axle lifting height 100 mm min.

Installation of wheel hub unit

Axle journal for installing the wheel hub unit
treated with Gleitmo 805

2.2 TIGHTENING TORQUES

Differential
Drive flange attachment nut 1250 Nm(1)
Differential lock cover attachment bolts 30 Nm
Attachment bolts differential to axle housing 260 Nm(2)
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 262 to secure

(2) Apply Loctite 572

Hub
Hub nut(1)
1st phase 500 Nm
2nd phase rpm turn the hub 10 revolutions at a speed of
approx. 40 rpm
3rd phase 550 Nm
4th phase rpm turn the hub 10 revolutions at a speed of
approx. 40 rpm
5th phase 1300 Nm
Axle shaft attachment bolts 260 Nm

(1) Only fit a new hub nut

2.3 FILLING CAPACITIES

Differential Minimum caster Maximum caster

Filling capacity approx. 18.0 litres approx. 20.0 litres

3. SINGLE REAR AXLE 1347

3.1 GENERAL 0
Sealant for differential
Mating surface and around bolt holes of axle
body Loctite 5910

Sealant for axle shaft

Mating surface of axle shaft flange Loctite 5910

Wheel speed sensor ring

Axial end play maximum 0.25 mm
Driven axle caster
FAG 3,5
FAS (11/7 ratio)(1) 4
FAS (10/10 ratio)(1) 3,5
Other 4,5

(1) With a lowered trailing axle

Trailing axle lifting height

Leaf-sprung trailing axle lifting height 100 mm min.
Installation of wheel hub unit
Axle journal for installing the wheel hub unit
treated with Gleitmo 805

3.2 TIGHTENING TORQUES

Differential gear
Drive flange attachment nut 1250 Nm(1)
Differential lock cover attachment bolts 30 Nm
Attachment bolts differential to axle housing 260 Nm(2)
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 262 to secure

(2) Apply Loctite 572

(1) Only fit a new hub nut

3.3 FILLING CAPACITIES

Differential Minimum caster Maximum caster

Filling capacity approx. 21.5 litres approx. 23.5 litres

4. SINGLE REAR AXLE 1354

4.1 GENERAL 0
Sealant for differential
Mating face and around stud bolts of banjo
housing Loctite 5910

Wheel bearings
Wheel bearings pre-load:
frictional force without hub seal 30 - 62 N(1)

(1) Measured at the circumference of the hub

Wheel speed sensor ring

Axial end play maximum 0.25 mm
Driven axle caster
FAG 3,5
FAS (11/7 ratio)(1) 4,0
FAS (10/10 ratio)(1) 3,5
Other 4,5

(1) With a lowered trailing axle

Trailing axle lifting height

Leaf-sprung trailing axle lifting height 100 mm min.

Studs from axle housing

Fit studs with locking compound Loctite 243

4.2 TIGHTENING TORQUES

Differential
Drive flange attachment nut 1325 Nm(1)
Locking nut of differential-lock cylinder 80 Nm
Attachment nuts differential to axle housing 260 Nm
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 262 to secure

Hub
Hub nut 2125 Nm
Locking plate attachment bolts 30 Nm(1)
Planet wheel attachment bolts 45 Nm
Hub cap attachment bolts 30 Nm
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 243 to secure

4.3 FILLING CAPACITIES

Differential
Filling capacities approx. 16.5 litres

Hub
Oil capacity, per hub 2.0 litres

5. TANDEM REAR AXLE 1132T

5.1 GENERAL 0
Sealant for differential
Mating surface and around bolt holes of axle
body Loctite 5910

Sealant for axle shaft

Mating surface of axle shaft flange Loctite 5910

Wheel bearings
Wheel bearing play 0.025 - 0.25 mm

Wheel speed sensor ring

Axial end play maximum 0.2 mm

Caster
Caster 5

5.2 TIGHTENING TORQUES

Differential
First axle drive flanges attachment nut 1385 Nm(1)
Second axle drive flanges attachment nut 1250 Nm(1)
Differential lock cover attachment bolts 30 Nm
M12 attachment bolts of pinion housing cover 70 Nm(2)
Attachment bolts differential to axle housing 170 Nm(3)
Torx plug (level check/filler and drain plug) 85 Nm
Hub
Hub nut (outside nut) 560 Nm
Axle shaft attachment bolts 260 Nm
Torx plug, wheel hub 85 Nm

(1) Use Loctite 262 to secure

(2) Use Loctite 243 to secure
(3) Use Loctite 572 to secure

5.3 FILLING CAPACITIES

Differential Minimum caster Maximum caster

Filling capacity of 1st axle approx. 17.0 litres approx. 25.0 litres
Filling capacity of 2nd axle approx. 15.0 litres approx. 17.5 litres

Hub
Oil capacity, per hub 0.8 litres

6. TANDEM REAR AXLE 1355T

6.1 GENERAL 0
Sealant for differential
Mating surface of banjo housing Loctite 5910
Flanges of attachment nuts and bolts, differential
to axle housing Loctite 5910
Bearing-house cover, input shaft Loctite 5910

Wheel bearings
Wheel bearings pre-load:
frictional force without hub seal 30 - 62 N (1)

(1) Measured at the circumference of the hub

Wheel speed sensor ring

Axial end play maximum 0.2 mm

Caster
Caster 5

6.2 TIGHTENING TORQUES

Differential
Drive flange attachment bolt 1385 Nm (1)
Differential lock cover attachment bolts 30 Nm
Attachment bolts differential to axle housing:
Attachment bolt M12 110 Nm (2)
Attachment bolt M14 x 1.5 200 Nm (2)
Attachment bolts of input shaft bearing cover 60 Nm
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 262 to secure

(2) Use Loctite 243 to secure

Adjusting the differential lock

Selector shaft adjusting screw is 0.1 mm under
the mating surface of the differential housing at
full engaging of the claws.

Hub
Hub nut 2125 Nm (1)
Locking plate attachment bolts 30 Nm
Planet wheel attachment bolts 45 Nm
Hub cap attachment bolts 30 Nm
Torx plug (level check/filler and drain plug) 85 Nm

(1) Use Loctite 243 to secure

6.3 FILLING CAPACITIES

Differential Minimum caster Maximum caster

Filling capacity of 1st axle approx. 13.0 litres approx. 18.0 litres
Filling capacity of 2nd axle approx. 11.5 litres approx. 13.0 litres

Hub
Oil capacity, per hub 2.0 litres

7. TANDEM REAR AXLE RT40-145/MT21-144

7.1 GENERAL 0
For technical data, please refer to the Meritor
product manuals or visit the Meritor web site at
"http://www.arvinmeritor.com".

7.2 TIGHTENING TORQUES

For tightening torques, please refer to the Meritor

product manuals or visit the Meritor web site at
"http://www.arvinmeritor.com".

7.3 FILLING CAPACITIES

Differential gear
Filling capacity of 1st axle approx. 14.3 litres
Filling capacity of 2nd axle approx. 12.2 litres

8. TRAILING AXLES
8.1 GENERAL 0
Installation of wheel hub unit
Axle journal for installing the wheel hub unit
treated with Gleitmo 805

8.2 TIGHTENING TORQUES

Hub
Hub nut of 09N075 trailing axle(1)
1st phase 400 Nm
2nd phase turn the hub 10 revolutions at a speed of
approx. 40 rpm
3rd phase 450 Nm
4th phase turn the hub 10 revolutions at a speed of
approx. 40 rpm
5th phase 950 Nm
Hub nut of 09N220 trailing axle(1)
1st phase 500 Nm
2nd phase turn the hub 10 revolutions at a speed of
approx. 40 rpm
3rd phase 550 Nm
4th phase turn the hub 10 revolutions at a speed of
approx. 40 rpm
5th phase 1300 Nm

(1) Only fit a new hub nut

Trailing axle
Attachment bolts, bearing block to bearing sup-
port 260 Nm
Outer bearing block adjusting nut 90 Nm
Pull-rod/push-rod attachment nut 130 Nm

9. HYDRAULIC LIFTING GEAR

9.1 GENERAL 0
Cut-out pressure, pressure switch 160 bar
Pre-set value, pressure relief valve 180 bar
Maximum admissible system pressure 200 bar
Test pressure, lifting cylinder 220 bar
Delivery line while lifting Line connection B
Delivery line while lowering Line connection A
(The characters are printed on the pump unit)
Safety device Once the trailing axle has been lowered, it can
only be lifted again after approx. 2.5 minutes. If
the control switch is put into the "lifting" position
before approx. 2.5 minutes has elapsed, the
lifting gear will not be activated and the time relay
will be reset. In that case you will have to wait
about another 2.5 minutes before the trailing axle
can be lifted.

9.2 TIGHTENING TORQUES

Pump unit
2/2 valve 25 Nm
4/2 valve 25 Nm
Pressure relief valve 30 Nm
Pressure switch 25 Nm
Pump attachment bolts 25 Nm
Engine attachment bolts 17 Nm

Cylinder
Piston attachment bolts 200 Nm

10.09N044 LEADING REAR AXLE (FTP VEHICLE)

10.1 GENERAL 0
Wheel bearing play, 09N044 leading rear axle 0 mm

10.2 TIGHTENING TORQUES

0 The tightening torques stated in this paragraph
are different from the standard tightening torques
stated in the overview of the standard tightening
torques. The other threaded connections not
specified must therefore be tightened to the
torque stated in the overview of standard
tightening torques.
When attachment bolts and nuts are replaced, it
is important that - unless stated otherwise - these
bolts and nuts are of exactly the same length and
property class as those removed.

Hub nut 100 Nm (1)

Hub cap 500 Nm
U-bolt nut M20, property class 10 553 Nm (2)

(1) Turn back until split pin can be fitted.

(2) Evenly tighten the two U-bolt nuts alternately.

CONTENTS
1 Diagnostics

Page Date

1. SINGLE REAR AXLE 1132. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1
2. SINGLE REAR AXLE 1339. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

3. SINGLE REAR AXLE 1347. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

4. SINGLE REAR AXLE 1354. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

5. TANDEM REAR AXLE 1132T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200424

5.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200424

6. TANDEM REAR AXLE 1355T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200424

6.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200424

7. HYDRAULIC LIFTING GEAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200424

7.1 Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200424

1. SINGLE REAR AXLE 1132

1.1 FAULT-FINDING TABLE

SYMPTOM: NOISES IN REAR AXLE AND DRIVE ASSEMBLY 1

Possible cause Remedy
Oil level too low Top up oil
Incorrect oil viscosity Drain oil and top up
Loosened attachment bolts or broken differential Drain oil and check drained oil for presence of
lock parts pieces of metal
Pinion-bearing play Adjust and/or replace

SYMPTOM: OIL LEAK

Possible cause Remedy
Oil level too high Drain oil
Incorrect oil viscosity Drain oil and top up
Leaking oil seal Replace oil seal
Bleeding system blocked Clean or replace the bleeding system
Oil leakage between the differential gear housing Clean mating surfaces and apply new sealant
mating surfaces

SYMPTOM: DIFFERENTIAL LOCK IS NOT FUNCTIONING

Possible cause Remedy
No air pressure at engaging cylinder Check compressed-air system
Defective pneumatic control Check or replace pneumatic switch
Defective mechanical shift control Check shift control

SYMPTOM: DIFFERENTIAL LOCK WARNING LAMP IS NOT FUNCTIONING

Possible cause Remedy
Switch on cylinder fitted too high Readjust switch
Switch on cylinder defective Replace switch
Fault in electrical circuit Check electrical circuit

2. SINGLE REAR AXLE 1339

2.1 FAULT-FINDING TABLE

SYMPTOM: NOISES IN REAR AXLE AND DRIVE ASSEMBLY 1

SYMPTOM: OIL LEAK

SYMPTOM: DIFFERENTIAL LOCK IS NOT FUNCTIONING

SYMPTOM: DIFFERENTIAL LOCK WARNING LAMP IS NOT FUNCTIONING

Possible cause Remedy
Switch on cylinder fitted too high Readjust switch
Switch on cylinder defective Replace switch
Fault in electrical circuit Check electrical circuit

3. SINGLE REAR AXLE 1347

3.1 FAULT-FINDING TABLE

SYMPTOM: NOISES IN REAR AXLE AND DRIVE ASSEMBLY 1

SYMPTOM: OIL LEAK

SYMPTOM: DIFFERENTIAL LOCK IS NOT FUNCTIONING

SYMPTOM: DIFFERENTIAL LOCK WARNING LAMP IS NOT FUNCTIONING

Possible cause Remedy
Switch on cylinder fitted too high Readjust switch
Switch on cylinder defective Replace switch
Fault in electrical circuit Check electrical circuit

4. SINGLE REAR AXLE 1354

4.1 FAULT-FINDING TABLE

SYMPTOM: NOISES IN REAR AXLE AND DRIVE ASSEMBLY 1

SYMPTOM: OIL LEAK

Possible cause Remedy
Oil level too high Drain oil
Incorrect oil viscosity Drain oil and top up
Leaking oil seal Replace oil seal
Bleeding system blocked Clean or replace the bleeding system
Oil leakage between the differential housing Clean mating surfaces and apply new sealant
mating surfaces

SYMPTOM: DIFFERENTIAL LOCK IS NOT FUNCTIONING

Possible cause Remedy
No air pressure at engaging cylinder Check compressed-air system
Defective pneumatic control Check or replace pneumatic switch
Incorrect setting engaging cylinder Adjust engaging cylinder
Defective mechanical shift control Check shift control

SYMPTOM: DIFFERENTIAL LOCK WARNING LAMP IS NOT FUNCTIONING

Possible cause Remedy
Defective pressure switch Replace pressure switch
Fault in electrical circuit Check electrical circuit

5. TANDEM REAR AXLE 1132T

5.1 FAULT-FINDING TABLE

SYMPTOM: NOISES IN REAR AXLE AND DRIVE ASSEMBLY 1

SYMPTOM: OIL LEAK

SYMPTOM: DIFFERENTIAL LOCK IS NOT FUNCTIONING

SYMPTOM: DIFFERENTIAL LOCK WARNING LAMP IS NOT FUNCTIONING

Possible cause Remedy
Switch on cylinder fitted too high Readjust switch
Switch on cylinder defective Replace switch
Fault in electrical circuit Check electrical circuit

6. TANDEM REAR AXLE 1355T

6.1 FAULT-FINDING TABLE

SYMPTOM: NOISES IN REAR AXLE AND DRIVE ASSEMBLY 1

SYMPTOM: OIL LEAK

SYMPTOM: DIFFERENTIAL LOCK IS NOT FUNCTIONING

SYMPTOM: DIFFERENTIAL LOCK WARNING LAMP IS NOT FUNCTIONING

Possible cause Remedy
Switch on cylinder fitted too high Readjust switch
Switch on cylinder defective Replace switch
Fault in electrical circuit Check electrical circuit

7. HYDRAULIC LIFTING GEAR

7.1 FAULT-FINDING TABLE

SYMPTOM: TRAILING AXLE DOES NOT LIFT, PUMP MOTOR IS NOT RUNNING 1
Possible cause Remedy
Time between lowering and lifting < 2.5 minutes, After lowering the axle wait for more than
causing the time relay to be constantly reset 2.5 minutes before putting the control switch into
the "lifting" position.
Fault in electrical circuit Check electrical circuit
Defective pump motor Replace pump motor

SYMPTOM: TRAILING AXLE DOES NOT LIFT, PUMP MOTOR IS OPERATING BUT IS SWITCHED
OFF IMMEDIATELY
Possible cause Remedy
4/2 valve is not functioning Check whether the 4/2 valve is activated
Connectors of 4/2 and 2/2 valves have been Check the connection using the wire numbers
switched
Piping kinked Check piping
Pipe connections on the pump unit have been Check pipe connections
switched

SYMPTOM: TRAILING AXLE IS LIFTED PARTIALLY, PUMP MOTOR IS SWITCHED OFF

Possible cause Remedy
Pressure switch activates at too low a pressure Check pressure switch cut-out pressure and
replace switch if necessary
Piping kinked Check piping
Blocked trailing axle or mechanical linkage of lifting Check the mechanical linkage
gear
In cold weather conditions: oil of incorrect viscosity Drain the oil and fill the system with the specified oil
used

SYMPTOM: TRAILING AXLE IS LIFTED PARTIALLY, PUMP MOTOR CONTINUES TO OPERATE

Possible cause Remedy
Not enough oil in the reservoir Check oil level and top up, if necessary
Opening pressure of pressure relief valve too low Check the opening pressure of the pressure relief
or valve is leaking valve. Adjust or replace the valve
The 4/2 valve is leaking Check the system pressure and subsequently the
4/2 valve
Insufficient pump delivery due to leakage between Check the system pressure, the pump and the
pump and valve block, a worn pump or a defective pump motor
motor

SYMPTOM: PUMP MOTOR CONTINUES TO OPERATE WHILE THE TRAILING AXLE HAS BEEN
FULLY LIFTED OR LOWERED
Possible cause Remedy

1 Pressure relief valve setting too low Check the opening pressure of the pressure relief
valve and adjust the pressure-relief valve
Pressure switch is not functioning Check the pressure switch and the wiring Replace
the pressure switch, if necessary
Fault in electrical circuit Check electrical circuit

SYMPTOM: TRAILING AXLE DOES NOT LOWER, PUMP MOTOR IS NOT RUNNING
Possible cause Remedy
Fault in electrical circuit Check electrical circuit

SYMPTOM: TRAILING AXLE IS NOT LOWERED, PUMP MOTOR IS OPERATING BUT IS

SWITCHED OFF IMMEDIATELY
Possible cause Remedy
2/2 valve is not functioning Check whether the 2/2 valve is activated
Connectors of 2/2 and 4/2 valves have been Check the connection using the wire numbers
switched
Piping kinked Check piping

SYMPTOM: TRAILING AXLE IS LOWERED QUICKLY, PUMP MOTOR IS NOT OPERATING AND
RESERVOIR MAY FLOOD
Possible cause Remedy
Fault in electrical circuit Check electrical circuit
Defective pump motor Repair or replace pump motor

SYMPTOM: TRAILING AXLE IS LOWERED AUTOMATICALLY ONCE LIFTED

Possible cause Remedy
External oil leakage Check piping, piping connections, pump unit and
cylinders for leakage
Bad sealing of the 2/2 valve or of the non-return Check pump unit for internal leakage and
valve built into of the 2/2 valve subsequently inspect the 2/2 valve
Internal leakage of one of the cylinders Check the cylinders for internal leakage

CONTENTS
2 Single rear axle 1132

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Overview drawing, wheel hub unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Checking the differential oil level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Checking the operation of the differential lock. . . . . . . . . . . . . . . . . . . . . .
2-1 . . . . .
2-2 . . . . .
200424
200424
2
2.3 Checking the wheel speed sensor ring . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Removal and installation, entire rear axle . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Removal and installation, axle shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Removal and installation, wheel hub unit . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 . . . . . 200424
3.4 Removal and installation, wheel speed sensor ring. . . . . . . . . . . . . . . . . . 3-8 . . . . . 200424
3.5 Removal and installation, drive flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 . . . . . 200424
3.6 Removal and installation, pinion oil seal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 . . . . 200424
3.7 Removal and installation, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 . . . . 200424
3.8 Removal and installation, differential lock . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 . . . . 200424

4. DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Draining and filling, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

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. 2
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 3
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 2
type. The nut is locked by bending the lips on the
hub nut outward. 1
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.

A8 00 356

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1. Axle shaft
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2. Hub nut
3. Thrust washer
4. Compact bearings
5. Hub
6. O-ring
7. Axle journal

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.

A 2
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".
B M8013

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

2 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.

1 2
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.
A8 00 342

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, ENTIRE REAR AXLE

Removing the entire rear axle

1. Block the front wheels using chocks.

2. Slacken the central bolt of the spring-brake

cylinder as much as possible.
2
3. Apply the parking brake.

4. Remove the air pipes and wiring.

5. Remove the prop shaft from the drive flange.

6. Loosen the shock absorbers on the bottom.

7. Support the vehicle securely with stands

under the chassis side members.

8. Remove the axle suspension/guide. Take

precautionary measures to make sure that
the axle does not tilt during removal of the
axle suspension/guide.

9. If possible, the entire rear axle with wheels

should be rolled from under the vehicle.

Installing the entire rear axle

1. Install the entire rear axle with wheels under
the vehicle.

2. Fit the axle suspension/guide.

3. Fit the shock absorbers.

4. Fit the prop shaft to the drive flange.

5. Connect the electrical wiring and fit the air

pipes.

6. Tighten the central bolt of the spring-brake

cylinder.

3.2 REMOVAL AND INSTALLATION, AXLE SHAFTS

Removing axle shafts

1. Jack up the rear axle and support the axle on
stands. A
2. Engage the differential lock. Check whether
2 the axle is blocked. Replace the switch by
the special tool (DAF no. 1329447), see (A).
This is to prevent the sliding sleeve from
falling into the differential when removing the
axle shaft.

A800139

3. Remove the axle-shaft attachment bolts.

4. Remove the axle shaft using special tool B

(DAF no. 0694980), if required, see (B).
When the axle shaft comes loose, a small
amount of oil may leak out. Collect this oil.

A8 00 351

Installing axle shafts

1. Clean the mating surfaces of the axle shaft
flange and wheel hub unit.

2. Apply sealant to the mating surface of the

axle shaft flange. See "Technical data".

3. Fit the axle shaft. Tighten the axle shaft

attachment bolts to the specified tightening
torque, see "Technical data". 2
4. Activate the differential lock and remove the
special tool from the differential lock. Install
the switch.

3.3 REMOVAL AND INSTALLATION, WHEEL HUB UNIT

4 5

2 6
7
1

9
10
A8 00 348

Removing the wheel hub unit

1. Jack up the rear axle and support the axle on
stands.

2. Remove the wheels.

3. Remove the brake calliper.

4. Remove the axle shaft.

5. Remove the hub nut (1) using the hub nut

wrench (A), which is part of the special tool
set (DAF no. 1329496). Loosen the hub nut
(1), using a torque amplifier to do so.

6. Remove the thrust washer (2). A

A8 00 405

7. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

8. Attach the wheel hub unit (3) securely to a

movable lifting device. 3

9. Slide the wheel hub unit (3) from the axle

journal using the lifting device.

10. Take care that the wheel hub unit (3) does
A 2
not rest on the guide bush (A) as the latter is
not strong enough to take the weight of the
wheel hub unit (3).

A8 00 345

Installing the wheel hub

1. Check the wheel speed sensor and the oil
seals in the wheel hub unit (3) for damage.

2. Check the axle journal thread carefully for

damage.

}
5
You must never fit a wheel hub on an
axle journal with a damaged thread.

3. Fit the O-ring (5) into the wheel hub unit.

A8 00 350

4. Apply a thin and even layer of the prescribed

lubricant to the axle journal, see "Technical
data".

Note:
Do not overlubricate the axle journal. While
fitting the wheel hub unit, the excess grease
will collect at the backside of the wheel hub.
When the vehicle is used in daily operation,
2 this anti-corrosion agent can leak out so that
it looks as if the oil seal leaks.

A8 00 344

5. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

A8 00 343

6. Attach the wheel hub unit (3) securely to a

movable lifting device. 3

7. Position the wheel hub unit (3) exactly in

front of the axle journal using the movable
lifting device. Slide the wheel hub unit (3) on
the axle journal.
Take care that the wheel hub unit (3) does
not rest on the guide bush as the latter is not 2
strong enough to take the weight of the
wheel hub unit (3). 1

8. Fit the thrust washer (2).

9. Replace the hub nut (1). Apply a few drops of

oil to the abutting surface of the hub nut (1).
Fit the hub nut (1). A8 00 356

10. Tighten the hub nut (1) using the hub nut
wrench (A), which is part of the special tool
set (DAF no. 1329496).
Tighten the hub nut (1) in the specified
manner using a torque amplifier, see
"Technical data". A

A8 00 405

11. Press the wheel speed sensor (1) up against

1 2
the sensor ring (2).
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

12. Fit the axle shaft.

13. Fit the brake calliper.

14. Put the wheels back on.

A8 00 342

3.4 REMOVAL AND INSTALLATION, WHEEL SPEED SENSOR RING

Removing the wheel speed sensor ring

1. Remove the wheel hub unit from the axle
journal.

2. Use a driving tool to carefully tap the sensor

2 ring from the inside from the wheel hub unit.
Make sure that the wheel hub unit is not
damaged in the process.

} Once removed, a sensor ring should

not be re-installed.

Installing the wheel speed sensor ring

1. Check the mating surfaces of sensor ring
and wheel hub unit for damage.

2. Check the new sensor ring carefully for

possible damages in transit.

3. Use a flat plate and a press to fit the sensor

ring to the wheel hub unit.
Press the sensor ring evenly on the wheel A8 00 359

hub unit until it fully abuts.

4. Install the wheel hub unit on the axle journal.

5. Press the wheel speed sensor (1) up against

1 2
the sensor ring (2).
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

A8 00 342

3.5 REMOVAL AND INSTALLATION, DRIVE FLANGE

Removing the drive flange

1. Remove the prop shaft from the drive flange. A B
2. Fit the special tool (B) (DAF no. 0484977) on
the drive flange to prevent the flange from
rotating. Remove the drive-flange nut using a
torque amplifier (A). 2
3. Remove the drive flange. If necessary, use a
puller.

Installing the drive flange

1. Before installation check the drive flange
along the oil-seal running surface for
grooves and/or sharp edges. If required,
replace the drive flange.

2. Fit the drive flange.

3. Apply a small amount of grease to the first

turn of the drive-flange nut. A8 00 357

4. Apply locking compound to the screw thread.

See "Technical data".

5. Fit the special tool (B) (DAF no. 0484977) on

the drive flange to prevent the flange from
rotating. Fit the drive-flange nut. Use a
torque amplifier (A) to tighten the drive-
flange nut to the specified tightening torque,
see "Technical data".

6. Fit the prop shaft to the drive flange.

3.6 REMOVAL AND INSTALLATION, PINION OIL SEAL

Removing the pinion oil seal

1. Remove the drive flange.
A B
2. Drill two holes into the seal and screw the
special tool (B) (DAF no. 0484899) into the
2 seal. Pull the oil seal from the pinion housing
using the special tool (A)
(DAF no. 0694928).

Installing the pinion oil seal

1. Use the special tool (DAF no. 1240452) to fit
the seal so that the inscription "outside" is
pointed outwards.

2. Fit the drive flange.

A8 00 360

3.7 REMOVAL AND INSTALLATION, DIFFERENTIAL

Removing the differential

1. Drain the oil from the differential, see
"Draining and filling".

2. Remove the prop shaft from the drive flange.

3. Remove the axle shafts.

2
4. Remove the air connection for the differential
lock.

5. Attach the differential securely to a lifting

device.

6. Remove the attachment bolts from the

differential.

7. Remove the differential from the axle

housing using two jacking screws.

Installing the differential

1. Clean the mating surfaces of the axle
housing and the differential housing. Regrind
the mating faces lightly. Do not damage the
mating faces in the process.

2. Clean and degrease the attachment bolts.

Apply locking compound to the attachment
bolts. See "Technical data".

3. Apply a thin, even layer of sealant to the

mating surface and around the bolt holes of
the axle housing, see "Technical data".

4. Fit the differential into the axle housing.

Install the attachment bolts and tighten them
evenly. Tighten the attachment bolts to the
specified torque. See "Technical data".

5. Fit the air connection to the differential lock.

6. Fit the axle shafts.

7. Fit the prop shaft to the drive flange.

8. Fill the differential with oil, see "Draining and

filling".

3.8 REMOVAL AND INSTALLATION, DIFFERENTIAL LOCK

Removing the differential lock

1. Remove the differential.

2 }
2.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

differential lock. Remove the special tool (A).

Evenly de-aerate the differential lock.

3. Remove the attachment bolts (1) from the 2

cylinder cover (2). Remove the cover.

1
A8 00 353

4. Remove the piston (5).

1
5. Remove the shifting fork (3) and the sliding
sleeve (1) with the spring (2).

Installing the differential lock

1. Fit the shifting fork (3) and the sliding sleeve 4
(1) with the spring (2).

Note:
Make sure that the flat side (see arrow) of the 2
shifting fork (3) points towards the piston (5).
5
2. Apply a small amount of oil to the piston (5)
sealing ring (4). 3
3. Install the piston (5). A8 00 354

4. Install the cylinder cover and tighten the

attachment bolts evenly. Tighten the
attachment bolts to the specified tightening
torque, see "Technical data".

}
5.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

A
differential lock. Fit special tool (A)
(DAF no. 1329447), so that the differential
lock is blocked.

6. Install the differential. 2

A8 00 346

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING, DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the differential 2

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A) and

drain plug (B). Drain the oil. A
3. Fit the drain plug (B) using the special Torx
wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

Filling the differential

1. Fill the differential via the level check/filler
plug (A) with the specified quantity of oil, see
"Technical data".

2. Check the oil level after approx. 5 minutes.

The oil level should now have reached the B M8013
level check/filler opening. See 'Inspection
and adjustment".

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

CONTENTS
3 Single rear axle 1339

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Checking the differential oil level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.2 Checking the operation of the differential lock. . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424
2.3 Checking the wheel speed sensor ring . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424

3
2.4 Inspection and adjustment, caster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

4. DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Draining and filling, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

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
3
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 3
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 2
type. The nut is locked by bending the lips on the
hub nut outward. 1
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.

A8 00 356

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1.2 OVERVIEW DRAWING, WHEEL HUB UNIT

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1. Axle shaft
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2. Hub nut
3. Thrust washer
4. Compact bearings
5. Hub
6. O-ring
7. Axle journal

2. INSPECTION AND ADJUSTMENT

2.1 CHECKING THE DIFFERENTIAL OIL LEVEL

}
1.
To prevent skin injury, avoid
unnecessary contact with the
drained oil.

Position the vehicle on a level surface.

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

A
sprung version.

3. Remove the oil-level check/filler plug (A). 3

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".
B M8013

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.
3 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.

1 2
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.
A8 00 342

2.4 INSPECTION AND ADJUSTMENT, CASTER

Checking the caster

1. Place the vehicle on a flat surface.

2. Try to achieve a nominal axle load with the

trailing axle on the ground.

3. Remove the prop shaft from the differential.

4. Place an angle gauge on the drive flange and

measure the caster of the axle relative to the
chassis side member. See "Technical data"
for the specified caster. 3
Adjusting the caster, leaf-sprung trailing axle

A
A8 00 292

Note:
The lowering of the lifting height of the trailing
axle reduces the caster. See "Technical data" for
the minimum lifting height of the trailing axle.

1. Fit a block (B) (can be made by yourself)

under the stop block.

2. Fit the stop block.

3. If the correction made by this process is

insufficient, the caster must be corrected on
the driven axle.

Adjusting the caster, driven axle

A
A8 00 292
1. Jack up the chassis in such a way that the
driven axle is free.

Note:
Ensure that both the chassis and axle are
well supported with stands.

2. Loosen the U-bolt nuts so that the correct

key can be fitted to position (A).

3. Tighten the U-bolt nuts evenly on both sides

to the specified torque.

4. Check the caster again.

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, ENTIRE REAR AXLE

Removing the entire rear axle

1. Block the front wheels using chocks.

2. Slacken the central bolt of the spring-brake

cylinder as much as possible.

3. Apply the parking brake.

4. Remove the air pipes and wiring.

3
5. Remove the prop shaft from the drive flange.

6. Loosen the shock absorbers on the bottom.

7. Support the vehicle securely with stands

under the chassis side members.

8. Remove the axle suspension/guide. Take

precautionary measures to make sure that
the axle does not tilt during removal of the
axle suspension/guide.

9. If possible, the entire rear axle with wheels

should be rolled from under the vehicle.

Installing the entire rear axle

1. Install the entire rear axle with wheels under
the vehicle.

2. Fit the axle suspension/guide.

3. Fit the shock absorbers.

4. Fit the prop shaft to the drive flange.

5. Connect the electrical wiring and fit the air

pipes.

6. Tighten the central bolt of the spring-brake

cylinder.

3.2 REMOVAL AND INSTALLATION, AXLE SHAFTS

Removing axle shafts

1. Jack up the rear axle and support the axle on
stands. A
2. Engage the differential lock. Check whether
the axle is blocked. Replace the switch by
the special tool (DAF no. 1329447), see (A).
This is to prevent the sliding sleeve from
falling into the differential when removing the
3 axle shaft.

A800139

3. Remove the axle-shaft attachment bolts.

4. Remove the axle shaft using special tool B

(DAF no. 0694980), if required, see (B).
When the axle shaft comes loose, a small
amount of oil may leak out. Collect this oil.

A8 00 351

Installing axle shafts

1. Clean the mating surfaces of the axle shaft
flange and wheel hub unit.

2. Apply sealant to the mating surface of the

axle shaft flange. See "Technical data".

3. Fit the axle shaft. Tighten the axle shaft

attachment bolts to the specified tightening
torque, see "Technical data".

4. Activate the differential lock and remove the

special tool from the differential lock. Install
the switch. 3

3.3 REMOVAL AND INSTALLATION, WHEEL HUB UNIT

4 5

3
2 6
7
1

9
10
A8 00 348

Removing the wheel hub unit

1. Jack up the rear axle and support the axle on
stands.

2. Remove the wheels.

3. Remove the brake calliper.

4. Remove the axle shaft.

5. Remove the hub nut (1) using the hub nut

wrench (A), which is part of the special tool
set (DAF no. 1329496). Loosen the hub nut
(1), using a torque amplifier to do so.

6. Remove the thrust washer (2). A

A8 00 405

7. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

8. Attach the wheel hub unit (3) securely to a

movable lifting device. 3

9. Slide the wheel hub unit (3) from the axle

journal using the lifting device.
A
10. Take care that the wheel hub unit (3) does
not rest on the guide bush (A) as the latter is
not strong enough to take the weight of the
wheel hub unit (3). 3
A8 00 345

Installing the wheel hub

1. Check the wheel speed sensor and the oil
seals in the wheel hub unit (3) for damage.

2. Check the axle journal thread carefully for

damage.

}
5
You must never fit a wheel hub on an
axle journal with a damaged thread.

3. Fit the O-ring (5) into the wheel hub unit.

A8 00 350

4. Apply a thin and even layer of the prescribed

lubricant to the axle journal, see "Technical
data".

Note:
Do not overlubricate the axle journal. While
fitting the wheel hub unit, the excess grease
will collect at the backside of the wheel hub.
When the vehicle is used in daily operation,
this anti-corrosion agent can leak out so that
it looks as if the oil seal leaks.

A8 00 344

5. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

A8 00 343

6. Attach the wheel hub unit (3) securely to a

movable lifting device. 3

7. Position the wheel hub unit (3) exactly in

8. Fit the thrust washer (2).

9. Replace the hub nut (1). Apply a few drops of

oil to the abutting surface of the hub nut (1).
Fit the hub nut (1). A8 00 356

3
A8 00 405

11. Press the wheel speed sensor (1) up against

1 2
the sensor ring (2).
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

12. Fit the axle shaft.

13. Fit the brake calliper.

14. Put the wheels back on.

A8 00 342

3.4 REMOVAL AND INSTALLATION, WHEEL SPEED SENSOR RING

Removing the wheel speed sensor ring

1. Remove the wheel hub unit from the axle
journal.

2. Use a driving tool to carefully tap the sensor

ring from the inside from the wheel hub unit.
Make sure that the wheel hub unit is not
damaged in the process.

3
} Once removed, a sensor ring should
not be re-installed.

Installing the wheel speed sensor ring

1. Check the mating surfaces of sensor ring
and wheel hub unit for damage.

2. Check the new sensor ring carefully for

possible damages in transit.

3. Use a flat plate and a press to fit the sensor

ring to the wheel hub unit.
Press the sensor ring evenly on the wheel A8 00 359

hub unit until it fully abuts.

4. Install the wheel hub unit on the axle journal.

5. Press the wheel speed sensor (1) up against

1 2
the sensor ring (2).
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

A8 00 342

3.5 REMOVAL AND INSTALLATION, DRIVE FLANGE

Removing the drive flange

1. Remove the prop shaft from the drive flange.
A B
2. Fit the special tool (B) (DAF no. 0484977) on
the drive flange to prevent the flange from
rotating. Remove the drive-flange nut using a
torque amplifier (A).

3. Remove the drive flange. If necessary, use a

puller.
3
Installing the drive flange
1. Before installation check the drive flange
along the oil-seal running surface for
grooves and/or sharp edges. If required,
replace the drive flange.

2. Fit the drive flange.

3. Apply a small amount of grease to the first

turn of the drive-flange nut.

4. Apply locking compound to the screw thread.

See "Technical data". A8 00 357

5. Fit the special tool (B) (DAF no. 0484977) on

the drive flange to prevent the flange from
rotating. Fit the drive-flange nut. Use a
torque amplifier (A) to tighten the drive-
flange nut to the specified tightening torque,
see "Technical data".

6. Fit the prop shaft to the drive flange.

3.6 REMOVAL AND INSTALLATION, PINION OIL SEAL

Removing the pinion oil seal

1. Remove the drive flange.
A B
2. Drill two holes into the seal and screw the
special tool (B) (DAF no. 0484899) into the
seal. Pull the oil seal from the pinion housing
using the special tool (A)
(DAF no. 0694928).

3 Installing the pinion oil seal

1. Use the special tool (DAF no. 1240452) to fit
the seal so that the inscription "outside" is
pointed outwards.

2. Fit the drive flange.

A8 00 360

3.7 REMOVAL AND INSTALLATION, DIFFERENTIAL

Removing the differential

1. Drain the oil from the differential, see
"Draining and filling".

2. Remove the prop shaft from the drive flange.

3. Remove the axle shafts.

4. Remove the air connection for the differential

lock.

5. Attach the differential securely to a lifting 3

device.

6. Remove the attachment bolts from the

differential.

7. Remove the differential from the axle

housing using two jacking screws.

Installing the differential

1. Clean the mating surfaces of the axle
housing and the differential housing. Regrind
the mating faces lightly. Do not damage the
mating faces in the process.

2. Clean and degrease the attachment bolts.

Apply locking compound to the attachment
bolts. See "Technical data".

3. Apply a thin, even layer of sealant to the

mating surface and around the bolt holes of
the axle housing, see "Technical data".

4. Fit the differential into the axle housing.

Install the attachment bolts and tighten them
evenly. Tighten the attachment bolts to the
specified torque. See "Technical data".

5. Fit the air connection to the differential lock.

6. Fit the axle shafts.

7. Fit the prop shaft to the drive flange.

8. Fill the differential with oil, see "Draining and

filling".

3.8 REMOVAL AND INSTALLATION, DIFFERENTIAL LOCK

Removing the differential lock

1. Remove the differential.

}
2.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

differential lock. Remove the special tool (A).

3 Evenly de-aerate the differential lock.

3. Remove the attachment bolts (1) from the 2

cylinder cover (2). Remove the cover.

1
A8 00 353

4. Remove the piston (5).

1
5. Remove the shifting fork (3) and the sliding
sleeve (1) with the spring (2).

Installing the differential lock

1. Fit the shifting fork (3) and the sliding sleeve 4
(1) with the spring (2).

4. Install the cylinder cover and tighten the

attachment bolts evenly. Tighten the
attachment bolts to the specified tightening
torque, see "Technical data".

}
5.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

A
differential lock. Fit special tool (A)
(DAF no. 1329447), so that the differential
lock is blocked.

6. Install the differential.

3
A8 00 346

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING, DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the differential

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A) and

drain plug (B). Drain the oil. A 3
3. Fit the drain plug (B) using the special Torx
wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

Filling the differential

1. Fill the differential via the level check/filler
plug (A) with the specified quantity of oil, see
"Technical data".

2. Check the oil level after approx. 5 minutes.

The oil level should now have reached the B M8013
level check/filler opening. See 'Inspection
and adjustment".

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

CONTENTS
4 Single rear axle 1347

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Removal and installation, entire rear axle . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Removal and installation, axle shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Removal and installation, wheel hub unit . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 . . . . .
3-4 . . . . .
200424
200424 4
3.4 Removal and installation, wheel speed sensor ring. . . . . . . . . . . . . . . . . . 3-8 . . . . . 200424
3.5 Removal and installation, drive flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 . . . . . 200424
3.6 Removal and installation, pinion oil seal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 . . . . 200424
3.7 Removal and installation, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 . . . . 200424
3.8 Removal and installation, differential lock . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 . . . . 200424

4. DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Draining and filling, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

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
4
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 3
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 2
type. The nut is locked by bending the lips on the
hub nut outward. 1
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.

A8 00 356

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1.2 OVERVIEW DRAWING, WHEEL HUB UNIT

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1 2 3 4 5 6 7

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1. Axle shaft
;;;
;;; A8 00 341

2. Hub nut
3. Thrust washer
4. Compact bearings
5. Hub
6. O-ring
7. Axle journal

2. INSPECTION AND ADJUSTMENT

2.1 CHECKING THE DIFFERENTIAL OIL LEVEL

}
1.
To prevent skin injury, avoid
unnecessary contact with the
drained oil.

Position the vehicle on a level surface.

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

A
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

4
(DAF no. 1329493) and tighten the plug to
the specified tightening torque. See
"Technical data".
B M8013

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
4 should be broken.

2.3 CHECKING THE WHEEL SPEED SENSOR RING

1. Remove the wheel hub unit.

1 2
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.
A8 00 342

2.4 INSPECTION AND ADJUSTMENT, CASTER

Checking the caster

1. Place the vehicle on a flat surface.

2. Try to achieve a nominal axle load with the

trailing axle on the ground.

3. Remove the prop shaft from the differential.

4. Place an angle gauge on the drive flange and

measure the caster of the axle relative to the
chassis side member. See "Technical data"
for the specified caster.

Adjusting the caster, leaf-sprung trailing axle

4
B

A
A8 00 292

Note:
The lowering of the lifting height of the trailing
axle reduces the caster. See "Technical data" for
the minimum lifting height of the trailing axle.

1. Fit a block (B) (can be made by yourself)

under the stop block.

2. Fit the stop block.

3. If the correction made by this process is

insufficient, the caster must be corrected on
the driven axle.

Adjusting the caster, driven axle

4
A
A8 00 292
1. Jack up the chassis in such a way that the
driven axle is free.

Note:
Ensure that both the chassis and axle are
well supported with stands.

2. Loosen the U-bolt nuts so that the correct

key can be fitted to position (A).

3. Tighten the U-bolt nuts evenly on both sides

to the specified torque.

4. Check the caster again.

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, ENTIRE REAR AXLE

Removing the entire rear axle

1. Block the front wheels using chocks.

2. Slacken the central bolt of the spring-brake

cylinder as much as possible.

3. Apply the parking brake.

4. Remove the air pipes and wiring.

5. Remove the prop shaft from the drive flange.

6. Loosen the shock absorbers on the bottom. 4

7. Support the vehicle securely with stands
under the chassis side members.

8. Remove the axle suspension/guide. Take

precautionary measures to make sure that
the axle does not tilt during removal of the
axle suspension/guide.

9. If possible, the entire rear axle with wheels

should be rolled from under the vehicle.

Installing the entire rear axle

1. Install the entire rear axle with wheels under
the vehicle.

2. Fit the axle suspension/guide.

3. Fit the shock absorbers.

4. Fit the prop shaft to the drive flange.

5. Connect the electrical wiring and fit the air

pipes.

6. Tighten the central bolt of the spring-brake

cylinder.

3.2 REMOVAL AND INSTALLATION, AXLE SHAFTS

Removing axle shafts

4
A800139

3. Remove the axle-shaft attachment bolts.

4. Remove the axle shaft using special tool B

(DAF no. 0694980), if required, see (B).
When the axle shaft comes loose, a small
amount of oil may leak out. Collect this oil.

A8 00 351

Installing axle shafts

1. Clean the mating surfaces of the axle shaft
flange and wheel hub unit.

2. Apply sealant to the mating surface of the

axle shaft flange. See "Technical data".

3. Fit the axle shaft. Tighten the axle shaft

attachment bolts to the specified tightening
torque, see "Technical data".

4. Activate the differential lock and remove the

special tool from the differential lock. Install
the switch.

3.3 REMOVAL AND INSTALLATION, WHEEL HUB UNIT

4 5

4 2 6
7
1

9
10
A8 00 348

Removing the wheel hub unit

1. Jack up the rear axle and support the axle on
stands.

2. Remove the wheels.

3. Remove the brake calliper.

4. Remove the axle shaft.

5. Remove the hub nut (1) using the hub nut

wrench (A), which is part of the special tool
set (DAF no. 1329496). Loosen the hub nut
(1), using a torque amplifier to do so.

6. Remove the thrust washer (2). A

A8 00 405

7. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

8. Attach the wheel hub unit (3) securely to a

movable lifting device. 3

9. Slide the wheel hub unit (3) from the axle

journal using the lifting device.
A
10. Take care that the wheel hub unit (3) does
not rest on the guide bush (A) as the latter is
not strong enough to take the weight of the
wheel hub unit (3).

A8 00 345
4
Installing the wheel hub
1. Check the wheel speed sensor and the oil
seals in the wheel hub unit (3) for damage.

2. Check the axle journal thread carefully for

damage.

}
5
You must never fit a wheel hub on an
axle journal with a damaged thread.

3. Fit the O-ring (5) into the wheel hub unit.

A8 00 350

4. Apply a thin and even layer of the prescribed

lubricant to the axle journal, see "Technical
data".

Note:
Do not overlubricate the axle journal. While
fitting the wheel hub unit, the excess grease
will collect at the backside of the wheel hub.
When the vehicle is used in daily operation,
this anti-corrosion agent can leak out so that
it looks as if the oil seal leaks.

4
A8 00 344

5. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

A8 00 343

6. Attach the wheel hub unit (3) securely to a

movable lifting device. 3

7. Position the wheel hub unit (3) exactly in

8. Fit the thrust washer (2).

9. Replace the hub nut (1). Apply a few drops of

oil to the abutting surface of the hub nut (1).
Fit the hub nut (1). A8 00 356

A8 00 405
4
11. Press the wheel speed sensor (1) up against
1 2
the sensor ring (2).
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

12. Fit the axle shaft.

13. Fit the brake calliper.

14. Put the wheels back on.

A8 00 342

3.4 REMOVAL AND INSTALLATION, WHEEL SPEED SENSOR RING

Removing the wheel speed sensor ring

1. Remove the wheel hub unit from the axle
journal.

2. Use a driving tool to carefully tap the sensor

ring from the inside from the wheel hub unit.
Make sure that the wheel hub unit is not
damaged in the process.

4
} Once removed, a sensor ring should
not be re-installed.

Installing the wheel speed sensor ring

1. Check the mating surfaces of sensor ring
and wheel hub unit for damage.

2. Check the new sensor ring carefully for

possible damages in transit.

3. Use a flat plate and a press to fit the sensor

ring to the wheel hub unit.
Press the sensor ring evenly on the wheel A8 00 359

hub unit until it fully abuts.

4. Install the wheel hub unit on the axle journal.

5. Press the wheel speed sensor (1) up against

1 2
the sensor ring (2).
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

A8 00 342

3.5 REMOVAL AND INSTALLATION, DRIVE FLANGE

Removing the drive flange

1. Remove the prop shaft from the drive flange.
A B
2. Fit the special tool (B) (DAF no. 0484977) on
the drive flange to prevent the flange from
rotating. Remove the drive-flange nut using a
torque amplifier (A).

3. Remove the drive flange. If necessary, use a

puller.

Installing the drive flange

1. Before installation check the drive flange
along the oil-seal running surface for
grooves and/or sharp edges. If required,
4
replace the drive flange.

2. Fit the drive flange.

3. Apply a small amount of grease to the first

turn of the drive-flange nut.

4. Apply locking compound to the screw thread.

See "Technical data". A8 00 357

5. Fit the special tool (B) (DAF no. 0484977) on

the drive flange to prevent the flange from
rotating. Fit the drive-flange nut. Use a
torque amplifier (A) to tighten the drive-
flange nut to the specified tightening torque,
see "Technical data".

6. Fit the prop shaft to the drive flange.

3.6 REMOVAL AND INSTALLATION, PINION OIL SEAL

Removing the pinion oil seal

Installing the pinion oil seal

1. Use the special tool (DAF no. 1240452) to fit
the seal so that the inscription "outside" is
pointed outwards.
4 2. Fit the drive flange.
A8 00 360

3.7 REMOVAL AND INSTALLATION, DIFFERENTIAL

Removing the differential

1. Drain the oil from the differential, see
"Draining and filling".

2. Remove the prop shaft from the drive flange.

3. Remove the axle shafts.

4. Remove the air connection for the differential

lock.

5. Attach the differential securely to a lifting

device.

6. Remove the attachment bolts from the

differential.
4
7. Remove the differential from the axle
housing using two jacking screws.

Installing the differential

1. Clean the mating surfaces of the axle
housing and the differential housing. Regrind
the mating faces lightly. Do not damage the
mating faces in the process.

2. Clean and degrease the attachment bolts.

Apply locking compound to the attachment
bolts. See "Technical data".

3. Apply a thin, even layer of sealant to the

mating surface and around the bolt holes of
the axle housing, see "Technical data".

4. Fit the differential into the axle housing.

Install the attachment bolts and tighten them
evenly. Tighten the attachment bolts to the
specified torque. See "Technical data".

5. Fit the air connection to the differential lock.

6. Fit the axle shafts.

7. Fit the prop shaft to the drive flange.

8. Fill the differential with oil, see "Draining and

filling".

3.8 REMOVAL AND INSTALLATION, DIFFERENTIAL LOCK

Removing the differential lock

1. Remove the differential.

}
2.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

differential lock. Remove the special tool (A).

Evenly de-aerate the differential lock.

3. Remove the attachment bolts (1) from the 2

cylinder cover (2). Remove the cover.
4
1
A8 00 353

4. Remove the piston (5).

1
5. Remove the shifting fork (3) and the sliding
sleeve (1) with the spring (2).

Installing the differential lock

1. Fit the shifting fork (3) and the sliding sleeve 4
(1) with the spring (2).

4. Install the cylinder cover and tighten the

attachment bolts evenly. Tighten the
attachment bolts to the specified tightening
torque, see "Technical data".

}
5.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

A
differential lock. Fit special tool (A)
(DAF no. 1329447), so that the differential
lock is blocked.

6. Install the differential.

A8 00 346

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING, DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the differential

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A) and

drain plug (B). Drain the oil. A
3. Fit the drain plug (B) using the special Torx
wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".
4
Filling the differential
1. Fill the differential via the level check/filler
plug (A) with the specified quantity of oil, see
"Technical data".

2. Check the oil level after approx. 5 minutes.

The oil level should now have reached the B M8013
level check/filler opening. See 'Inspection
and adjustment".

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

CONTENTS
5 Single rear axle 1354

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Overview drawing, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Inspection and adjustment, wheel bearing play. . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.2 Checking the hub oil levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424
2.3 Checking the differential oil level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424
2.4 Checking the operation of the differential lock. . . . . . . . . . . . . . . . . . . . . . 2-3 . . . . . 200424
2.5 Checking the hub and wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 . . . . . 200424
2.6 Checking the wheel speed sensor ring . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 . . . . . 200424
2.7 Inspection and adjustment, caster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Removal and installation, entire rear axle . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Removal and installation, axle shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Removal and installation, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Removal and installation, hub seal/wheel speed sensor ring unit . . . . . . .
3-3 . . . . .
3-6 . . . . .
200424
200424
5
3.5 Removal and installation, wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 . . . . . 200424
3.6 Removal and installation, drive flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 . . . . 200424
3.7 Removal and installation, pinion oil seal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 . . . . 200424
3.8 Removal and installation, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 . . . . 200424
3.9 Removal and installation, differential lock . . . . . . . . . . . . . . . . . . . . . . . . . 3-14 . . . . 200424

4. DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Draining and filling, hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424
4.2 Draining and filling, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 . . . . . 200424

1. GENERAL
1.1 DESCRIPTION

The reduction in the differential is only very

limited. That is why a single-reduction differential
can be applied with a pinion which has a relatively
large diameter, creating a relatively favourable
load.
The load for the satellite gears, planet gear and
axle shafts is low.
Due to this low load the crown wheel and pinion
could be equipped with a helical toothing instead
of a hypoid bevelled gear.
The fitting dimension of the pinion is adjusted
using shims, the bevel gear-to-pinion backlash is
adjusted using adjusting nuts.
The pinion is supported on two bevel roller
bearings. The bearing pre-load of the bevel roller
bearings is adjusted using spacers which are
positioned between the inner bearing race of the 5
front bevel roller bearing and the shoulder of the
pinion.
The satellite-gear housing is supported on bevel
roller bearings.
The pre-load of these bearings is adjusted using
adjusting nuts.

Differential lock
The differential is equipped with a variable
differential lock.
The satellite-gear housing flange is fitted with 1
radial toothing at the right. The left side of the
selector sleeve is equipped with similar toothing.
This selector sleeve is also equipped with
keyways which fit into the keyways in the right
axle shaft. The left axle-shaft journal is also
equipped with keyways which fit into the internal
keyways of the planet wheel. The selector sleeve
(9) can be slid over the axle shaft using a fork (6).
This hinged fork is suspended from the axle (5) 6 4
fitted to the axle housing. The fork is operated via 5 3
the control rod which is activated by the engaging
cylinder (1). The connection between fork and
selector sleeve is composed of two sliding blocks
(7) which fit into a groove of the selector sleeve
(9). A spring clip ensures that the selector sleeve 2
and sliding blocks do not fall into the axle

5 housing, once the right axle shaft has been

removed. Air is admitted to and bled from the
engaging cylinder via a pneumatic valve which is
9
7

operated by a switch on the dashboard.

Once the engaging cylinder is pressurised, the
selector sleeve will move to the left.
Subsequently the toothing of the selector sleeve
will engage the toothing of the satellite-gear
housing.
This will create a rigid connection from the
satellite-gear housing via the selector sleeve to 8
A800021
the right axle shaft. As a consequence, the
remaining parts of the differential, such as the
planet wheels and satellite gears, can no longer
turn in relation to the satellite-gear housing. The
differential is now locked and both the left and the
right axle shafts are loaded with 50% of the
torque. If the engaging cylinder is bled using the
pneumatic switch on the dashboard, a spring in
the engaging cylinder will deactivate the lock.

1.2 OVERVIEW DRAWING, WHEEL HUB

38
35
13 36

12
14
15
25
34
27 24
23
11 10

31
33
29 5
26 39
22
33 37 8
29
21 28
47 32 30
16
18
2 17
19 3
6
7

1
9

4
46
43

41-42 44
A8 00 349

1 Hub
2. Brake drum
3. Wheel stud
4. Nut
5. Grease retainer
6. Oil seal
7. Taper roller bearing
8. Spacer sleeve
9. Taper roller bearing
10. Flange bolt
11. Attachment plate
12. Hub nut
13. Annular gear
14. Thrust washer
15. Ring
16. Stud bolt
17. Spring washer
18. Sealing ring

5 19.
20.
Nut
Cap screw
21. Magnet plug
22. Yoke pin
23. Circlip
24. Ring
25. Gear wheel
26. O-ring
27. Planet-gear carrier
28. Shaft
29. Shim
30. Planet wheel
31. Needle bearing
32. Circlip
33. Shim
34. O-ring
35. Flange bolt
36. Locking plate
37. Plug
38. Annular-gear carrier
39. Spacer ring
40. Cap screw
41. Flange bolt
42. Flange nut
43. Grommet
44. Grommet
45. Bracket
46. Cap
47. Hub cap
48. Cover

2. INSPECTION AND ADJUSTMENT

2.1 INSPECTION AND ADJUSTMENT, WHEEL BEARING PLAY

1. Remove the wheel hub. See "Removal and

installation".

2. Remove the hub seal. See "Removal and

installation".

3. Fit the wheel hub without the hub seal.See

"Removal and installation".

4. Turn a rope several times around the hub

and attach it to a wheel stud.
Pull the rope using a tensioner gauge and
read off the force required to turn the hub at
a constant speed.
Compare the pressure reading with the
technical data. See "Technical data".

5. The pre-load of the wheel bearings can be

5
changed by removing or fitting spacers
between the spacer sleeve and the inner
wheel bearing. See "Removal and
A800039
installation".

2.2 CHECKING THE HUB OIL LEVELS

}
1.
To prevent skin injury, avoid
unnecessary contact with the
drained oil.

Position the vehicle on a level surface.

2. Position the wheels so that the arrow on the

hub is pointing upwards.

3. Remove the level check plug (A). The oil

level should have reached the opening.

4. Fit the drain plug (B) using the special Torx

wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

5 A

A8 00 365

2.3 CHECKING THE DIFFERENTIAL OIL LEVEL

}
1.
To prevent skin injury, avoid
unnecessary contact with the
drained oil.

Position the vehicle on a level surface.

2. Lower the trailing axle, if present, on a leaf- A

sprung version.

3. Remove the level check/filler plug (A).

The oil level should have reached the level
check/filler opening.

4. Fit the drain plug (B) using the special Torx

wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

B M8048

2.4 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.

2.5 CHECKING THE HUB AND WHEEL BEARINGS

1. Inspect the bearings for damage at the 5

following points:
- the roller bearing race,
- the bearing cage,
- the raceways of the inner and outer
race.
If damage is found, the entire bearing (inner
race/bearing cage and outer race) should be
replaced.

2. If the outer race of the bearing is loose in the

hub or has turned in the hub, the hub should
be replaced.

3. Check the axle journal screw thread, the

bearing surfaces of the inner bearing races
and the running surface of the seal for
damage.

4. Check the wheel speed sensor ring for

damage. Replace the ring at even the
slightest trace of damage.

2.6 CHECKING THE WHEEL SPEED SENSOR RING

1. Remove the wheel hub. See "Removal and

installation".

2. Check the sensor ring (1) for deposits.

Special attention should be paid to deposits 1 2
between the teeth of the sensor ring.
Clean the sensor ring if necessary.

3. Check the sensor ring (1) for damage. Even

the slightest damage can cause a failure. If
necessary replace the sensor ring.

4. If possible, the sensor ring (1) should be

checked for the maximum admissible axial
end play. See "Technical data".

5. Check the sensor (2) for freedom of

movement.
5
A8 00 347
If necessary, clean the sensor and apply new
grease.

2.7 INSPECTION AND ADJUSTMENT, CASTER

Checking the caster

1. Place the vehicle on a flat surface.

2. Try to achieve a nominal axle load with the

trailing axle on the ground.

3. Remove the prop shaft from the differential.

4. Place an angle gauge on the drive flange and

measure the caster of the axle relative to the
chassis side member. See "Technical data"
for the specified caster.

Adjusting the caster, leaf-sprung trailing axle

B
5

A
A8 00 292

Note:
The lowering of the lifting height of the trailing
axle reduces the caster. See "Technical data" for
the minimum lifting height of the trailing axle.

1. Fit a block (B) (can be made by yourself)

under the stop block.

2. Fit the stop block.

3. If the correction made by this process is

insufficient, the caster must be corrected on
the driven axle.

Adjusting the caster, driven axle

5 A
A8 00 292
1. Jack up the chassis in such a way that the
driven axle is free.

Note:
Ensure that both the chassis and axle are
well supported with stands.

2. Loosen the U-bolt nuts so that the correct

key can be fitted to position (A).

3. Tighten the U-bolt nuts evenly on both sides

to the specified torque.

4. Check the caster again.

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, ENTIRE REAR AXLE

Removing the entire rear axle

1. Block the front wheels using chocks.

2. Slacken the central bolt of the spring-brake

cylinder as much as possible.

3. Apply the parking brake.

4. Remove the air pipes and wiring.

5. Remove the prop shaft from the drive flange.

6. Loosen the shock absorbers on the bottom.

7. Loosen the control rod of the ALR valve.

8. Support the vehicle securely with stands

under the chassis side members.
5
9. Remove the axle suspension/guide.
Take precautionary measures to make sure
that the axle does not tilt during removal of
the axle suspension/guide.

10. If possible, the entire rear axle with wheels

should be rolled from under the vehicle.

Installing the entire rear axle

1. Install the entire rear axle with wheels under
the vehicle.

2. Fit the axle suspension/guide.

3. Fit the control rod of the ALR valve.

Note:
Check the setting of the ALR valve following
installation of the rear axle.

4. Fit the shock absorbers.

5. Fit the prop shaft to the drive flange.

6. Connect the electrical wiring and fit the air

pipes.

7. Tighten the central bolt of the spring-brake

cylinder.

3.2 REMOVAL AND INSTALLATION, AXLE SHAFTS

Removing axle shafts

1. Jack up the rear axle and support the axle on
stands.

2. Drain the hub oil. See "Draining and filling".

3. Remove the attachment bolts from the hub

cap and remove the hub cap.

4. Pull the axle shaft from the wheel hub.

5 A800289

Installing axle shafts

1. Fit the axle shaft into the wheel hub.

2. Turn the planet-gear shafts so that the flat

sides point outward.

3. Check the O-ring in the hub cap. If

necessary, replace the O-ring. Apply silicone
grease to the O-ring.

4. Install the spring assembly. Tighten the

attachment bolts to the specified torque. See
"Technical data".

5. Fill the hub with oil. See "Draining and filling".

A800040

3.3 REMOVAL AND INSTALLATION, WHEEL HUB

Removing the wheel hub

1. Jack up the rear axle and support the axle on
stands.

2. Remove the wheels.

3. Release the brakes and remove the brake

drum.

4. Mark the hub at the semicircular hole in the

cover.

5. Drain the oil. See "Draining and filling".

6. Remove the hub cap.

7. Remove the axle shaft.

A800290

8. Remove the attachment nuts and tapered

spring washers.
Remove the planet-gear set from the hub
using three jacking screws.

Note:
Make sure that the planet-gear set is put
down with the circlips facing upward. This
will prevent the pins from falling out.

9. Remove the thrust washer from the axle

journal.

10. Remove the attachment bolts from the

locking plate and remove the locking plate.

A800107

11. Remove the hub nut using special tool

(DAF no. 0535705) and a torque amplifier
(ratio 1 : 5).

12. Support the hub and pull it from the axle

journal. The annular-gear carrier with the
annular gear, the bearings and the spacer
sleeve with spacer rings will be removed at
the same time.

13. Remove the annular-gear carrier with the

annular gear from the hub.

Installing the wheel hub

A800038

Note:
If you have not replaced the wheel bearings and
intend to reuse the original spacer sleeve with
spacer rings, you need not readjust the wheel
bearing pre-load.

5 If the wheel bearings have been replaced, the

wheel bearing pre-load should be re-adjusted,
see chapter "Inspection and adjustment".
You must adjust the wheel bearing pre-load
before fitting the hub seal.
1. Replace the hub seal.

2. Check the components for signs of wear

and/or damage.

3. Replace the O-rings.

4. Apply oil to the wheel bearings.

5. Fit the hub on the axle journal.

6. Fit the original spacer sleeve and spacer

rings.

7. Fit the inner race of the outer wheel bearing

on the axle journal.

8. Fit the annular-gear carrier with the annular

gear into the hub and on the splines of the
axle journal.

9. Fit the hub nut and tighten it using special

tool (DAF no. 0535705) and a torque
amplifier (ratio 1 : 5).
Tighten the hub nut to the specified
tightening torque, see "Technical data".
Turn the hub nut while tightening it.

A800038

10. Fit the locking plate. Apply locking

compound to the attachment bolts and
tighten them to the specified torque. See
"Technical data".

11. Install the thrust washer.

A800107

12. Fit the planet-wheel set in its original position

in the hub (watch the markings).

13. Install the tapered spring washers and

tighten them to the specified torque. See
"Technical data".

14. Fit the axle shaft.

15. Check the O-ring in the hub cap. If

necessary, replace the O-ring. Apply silicone
grease to the O-ring.

16. Install the spring assembly. Tighten the

attachment bolts to the specified torque. See
"Technical data".

17. Fill the hub with oil. See "Draining and filling".
A800290

18. Press the sensor (2) against the sensor

ring (1). 1 2
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

A8 00 347

3.4 REMOVAL AND INSTALLATION, HUB SEAL/WHEEL SPEED SENSOR RING

UNIT
5
Removing the hub seal/wheel speed sensor
ring
1. Remove the hub from the axle journal.

2. Fit special tool (3) (DAF no. 1329411) to the

impact puller (2), special tool
(DAF no. 0694928). 1
Fit the special tool (3) behind the seal/sensor
ring (1).
Use the impact puller (2) to pull the seal/ 2
sensor ring (1) evenly from the hub.
Once removed, the seal/sensor ring cannot
be reused.

3
S7 00 424

Installing the hub seal/wheel speed sensor

ring

A B C D E F

1 2 3 H I K L

4 G

S7 00 405
1. Check the recess for the seal/sensor ring (4)
in the hub (2) for damage.

2. Use the special tool (DAF no. 1240036) to

install the seal/sensor ring (4).

3. Assemble the special tool: turn the threaded

ends (A) and (L) into the centring spindle (E).
Assemble the short stud (L) on the side
where the pin has been fitted into the
centring spindle (E).

4. Slide the appropriate centring flange (F) over E F

the centring spindle (E).

5. Install the inner wheel bearing (3).

Insert the centring spindle (E) together with
the centring flange (F) into the hub (2).

6. Press the centring flange (F) into the inner

wheel bearing (3).
3 H I K L
7. Slide the appropriate centring flange (D) on
the centring spindle (E).

8. Fit the retaining plate (C) and the nut (B) on

5 9.
the centring spindle (E).

Align the centring flange (D) on the outer

race of the outer wheel bearing and hand- 4 G
2
tighten nut (B) (max. 20 Nm). The centring
spindle (E) must be installed in the hub (2)
free of play. S7 00 411

10. Fit the ring (G) on the draw-in flange (H).

11. Position the seal/sensor ring (4) in front of

the hub (2).
Slide the draw-in flange (H) with the washer
(G) over the centring spindle (E) against the
seal/sensor ring (4).

12. Fit the retaining plate (I) and the nut (K).

13. Press the seal/sensor ring (4) evenly into the

hub (2) using nut (K), until the sensor ring
abuts the hub (2).

14. Remove the special tool.

15. Apply grease to the sealing lips of the seal/

sensor ring (4).

16. Fit the hub on the axle journal.

3.5 REMOVAL AND INSTALLATION, WHEEL BEARINGS

Removing wheel bearings

1. Remove the wheel hub.

2. Remove the hub seal.

3. Remove the inner bearing.

4. Use a driver to tap the bearing outer races

from the hub if the wheel bearings need to be
replaced. For this purpose, the hub has been
fitted with two recesses (A) and (B).
A
Installing wheel bearings
1. Clean the bearings and check them for signs
of damage.

2. Use a driving tool and a hydraulic press to

install the outer races into the hub. You can
also tap the outer races evenly into the hub
using a driver.
B 5
3. Fit the wheel hub.
M8120

4. Adjust the wheel bearing play until correct.

3.6 REMOVAL AND INSTALLATION, DRIVE FLANGE

Removing the drive flange

1. Remove the prop shaft from the drive flange.
A B
2. Fit the special tool (B) (DAF no. 0484977) on
the drive flange to prevent the flange from
rotating. Remove the drive-flange nut using a
torque amplifier (A).

3. Remove the drive flange. If necessary, use a

puller.

Installing the drive flange

1. Before installation check the drive flange
along the oil-seal running surface for
grooves and/or sharp edges. If required,
replace the drive flange.

5 2. Fit the drive flange.

3. Apply a small amount of grease to the first

turn of the drive-flange nut.

4. Apply locking compound to the screw thread.

See "Technical data". A8 00 357

5. Fit the special tool (B) (DAF no. 0484977) on

the drive flange to prevent the flange from
rotating. Fit the drive-flange nut. Use a
torque amplifier (A) to tighten the drive-
flange nut to the specified tightening torque,
see "Technical data".

6. Fit the prop shaft to the drive flange.

3.7 REMOVAL AND INSTALLATION, PINION OIL SEAL

Removing the pinion oil seal

Installing the pinion oil seal

1. Use the special tool (DAF no. 1240088) to fit
the seal so that the inscription "outside" is
pointed outwards.

2. Fit the drive flange.

A8 00 426

3.8 REMOVAL AND INSTALLATION, DIFFERENTIAL

Removing the differential

1. Drain the oil from the differential and the
hubs, see Chapter "Draining and filling".

2. Remove the prop shaft from the drive flange.

3. Remove the left axle shaft.

4. Pull the right axle shaft (i.e. on the side

where the differential-gear lock cylinder is
fitted) 15 - 18 cm from the hub.
1
9 8 7 65 4 3 2
18 17 16 15 14 13 12 11 10
24 23 22 21 20 19
5. Remove the air connection for the differential
lock.

6. Slacken the locking nut of the differential lock

cylinder and turn the differential lock cylinder
5 out approx. one turn.
A800291

7. Attach the differential securely to a lifting

device.

8. Remove the attachment bolts from the

differential.

9. Remove the differential from the axle

housing using two jacking screws.

Installing the differential

1. Install the right axle shaft and slide it into the
selector sleeve of the differential lock
cylinder.

2. Slacken the engaging cylinder until the

selector sleeve is positioned inside the edge
of the axle housing.

3. Remove the jacking screws.

4. Clean the mating surfaces of the banjo

housing and the differential housing and
regrind the surfaces lightly. Do not damage
the mating faces in the process.
A800024

5. Check the stud bolts for signs of damage.

Replace the stud bolts if these are damaged.
Apply locking compound to the new stud
bolts, see "Technical data".

6. Apply a thin, even layer of sealant to the

mating surface and around the stud bolts of
5
the banjo housing, see "Technical data".

7. Fit the differential into the banjo housing.

Evenly tighten the nuts. Tighten the nuts to
the specified tightening torque, see
"Technical data".
A800035

8. Install the left axle shaft and slide both axle

shafts into the differential.

9. Tighten the engaging cylinder while turning

the right wheel at the same time, until the
teeth of the selector sleeve and the satellite-
gear housing engage.

10. Slacken the engaging cylinder 1.5 turns and

tighten the lock nut to the specified tightening
torque, see "Technical data". 1,5x
11. Fit the air connection to the differential lock.

12. Fit the prop shaft to the drive flange.

A800034

13. Fill the differential and the hubs with oil. See
"Draining and filling".

3.9 REMOVAL AND INSTALLATION, DIFFERENTIAL LOCK

Removing the differential lock

1. Remove the differential. ø30

2. Remove the yoke axle (5) from the yoke (6)

using a home-made yoke puller (A800151). ø16

6
ø9

120

165
ø30

M8
A800151

A800026

3. Remove the split pin (4), ring (3) and yoke

pin (2) and remove the yoke (6) from the axle
housing. 1
4. Remove the floating blocks (7) from the yoke
(6).

5. Turn the pneumatic cylinder (1) out of the

housing.

6. Check the toothing of the selector sleeve (9)

and the right satellite-gear housing flange for 6 4
signs of damage and wear. 5 3
7. Check whether the selector sleeve moves
smoothly over the axle shaft.

8. Check whether the yoke (6) moves smoothly 2

over the axle (5).
7
9. If the toothing of the satellite-gear housing
flange appears to be damaged, you must not
only replace this flange but also the entire
9
5
satellite-gear housing. You cannot replace
these two components separately.

10. If necessary, remove the engaging cylinder

and check the various parts for signs of
damage.
8
A800021

Installing the differential lock

1. Turn the engaging cylinder (1) with lock nut
entirely into the axle housing.

A800028

2. Fit the yoke (6) with yoke pin (2), ring (3) and
split pin (4) to the cylinder control rod.
1

6 4
5 3

2
7
5 9

8
A800021

3. Install the yoke with axle into the differential

housing, making sure that the threaded hole
of the axle points outward (see arrow).

4. Use a nylon or copper hammer to tap the

axle into the axle housing until the axle
journal is positioned flush with or slightly
lower than the mating surface of axle
housing and differential.

A800030

5. Fit the floating blocks (7) into the yoke (6). Fit
the selector sleeve (9) with the spring clip (8)
into the yoke. Pull the spring clip (8)
downward on both sides, so that the
narrowest part of the semicircular holes is
positioned behind the edges of the floating
blocks.

6. Install the right axle shaft and slide it into the

selector sleeve.

A800031

7. Slacken the engaging cylinder until the

selector sleeve is positioned inside the edge
5
of the axle housing. Make sure that the axle
shaft end is flush with the top of the selector
sleeve toothing.

8. Install the differential.

A800032

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING, HUB

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the hub

1. Position the vehicle on a level surface.

2. Position the wheels in such a way that the oil

drain/filler plug (A) is on the underside.

3. Remove the oil level check plug (B) and oil

drain/filler plug (A).

4. Drain the oil and let the oil leak out of the B
hub.
5

A8 00 363

Filling the hub

1. Position the wheels in such a way that the oil
drain/filler plug (A) is at the top.

2. Fill the hub with the specified quantity of oil.

See "Technical data".

3. Check the oil level after approximately

5 minutes. See "Inspection and adjustment". A
4. Fit the plugs using the special Torx wrench
(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".

5
A8 00 364

4.2 DRAINING AND FILLING, DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the differential

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A) and A

drain plug (B). Drain the oil.

3. Fit the drain plug (B) using the special Torx

wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

Filling the differential

1. Fill the differential via the level check/filler
plug (A) with the specified quantity of oil, see
"Technical data". 5
2. Check the oil level after approx. 5 minutes.
The oil level should now have reached the
B M8048

level check/filler opening. See 'Inspection

and adjustment".

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

CONTENTS
6 Tandem rear axle 1132T

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Overview drawing, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Inspection and adjustment, wheel bearing play. . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.2 Checking the hub oil levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 . . . . . 200424
2.3 Draining and filling, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 . . . . . 200424
2.4 Checking the operation of the differential lock. . . . . . . . . . . . . . . . . . . . . . 2-6 . . . . . 200424
2.5 Checking the hub and wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 . . . . . 200424
2.6 Checking the wheel speed sensor ring . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Removal and installation, entire rear axle . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Removal and installation, axle shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Removal and installation, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 . . . . . 200424
3.4 Removal and installation, hub seal/wheel speed sensor ring unit . . . . . . . 3-6 . . . . . 200424
3.5 Removal and installation, wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . 3-8 . . . . . 200424
3.6 Removal and installation, drive flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 . . . . . 200424
3.7 Removal and installation, input shaft pinion oil seal . . . . . . . . . . . . . . . . .
3.8 Removal and installation, output shaft pinion oil seal . . . . . . . . . . . . . . . .
3-10 . . . .
3-10 . . . .
200424
200424 6
3.9 Removal and installation, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 . . . . 200424
3.10 Removal and installation, differential lock . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 . . . . 200424

4. DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Draining and filling, hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424
4.2 Draining and filling, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 . . . . . 200424

1. GENERAL
1.1 DESCRIPTION

The tandem rear axle 1132T consists of two 1132

rear axles.
In the first axle the torque is divided over the first
and second axle. To enable speed differences
between the two axles, a so-called third
differential is installed. If required, the differential
can be locked. Via the axle shafts the torque is
transferred to the wheel hubs; a single reduction
is applied.
The differentials are equipped with a hypoid bevel
gear.
Differential lock
The 1132 T differential is equipped with a variable
differential lock.
The satellite-gear housing flange is fitted with
spline toothing at the right. 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
6
the engaging cylinder.
Operation of differential lock
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.

1.2 OVERVIEW DRAWING, WHEEL HUB

6 8
5 7

4
2 3
1

A8 00 425

1. Lock nut
6 2.
3.
Circlip
Hub nut
4. Bevelled roller bearing
5. Hub
6. Wheel stud
7. Bevelled roller bearing
8. Hub oil seal/wheel speed sensor ring

2. INSPECTION AND ADJUSTMENT

2.1 INSPECTION AND ADJUSTMENT, WHEEL BEARING PLAY

Checking the wheel bearing play

1. Jack up the rear axle and support the axle on
stands.

2. Drain the hub oil. See "Draining and filling".

3. Remove the axle shafts. See "Removal and

installation".

4. Use the special tool (DAF no. 0535595) for

checking the wheel bearing play.

5. Remove two opposite wheel nuts.

W807008

6. Fit the extensions of the special tool to the

now vacant wheel studs.

7. Always clean the measuring surface

thoroughly and tighten the central nut on the
shaft journal.

8. Place the dial gauge holder on the central

nut. Place the dial gauge so that the stylus
abuts the hub.

9. Screw the spindle into the bridge and fit it to

the extensions so that the end of the spindle
fits into the recess of the central nut. Tighten
the bridge with the nuts.

6 A800149

10. Press the hub firmly on to the axle journal by

screwing the spindle anti-clockwise, to a
tightening torque of 40 Nm.

40Nm

M8130

11. Withdraw the hub by screwing the spindle

clockwise, to a tightening torque of 40 Nm.

40Nm

M8131

12. Press the hub firmly on to the axle journal by

screwing the spindle anti-clockwise, to a
tightening torque of 15 Nm.
Set the dial gauge to "0".

15Nm

M8132

13. Withdraw the hub by screwing the spindle

clockwise, to a tightening torque of 15 Nm.
The value on the dial gauge should equal
that in the technical data. See "Technical
data".

14. Readjust the wheel bearing play if a 15Nm

deviating value is measured.
6

M8133

Adjusting the wheel bearing play

1. Tighten the hub nut using special tool
(DAF no. 0694894) to a torque of 100 Nm,
while turning the hub.

2. Turn the hub nut anti-clockwise 45 and 60

until the dowel pin of the axle nut falls into the
holes of the circlip. This way the prescribed
wheel bearing play is achieved.

3. Fit the circlip and the lock nut. Tighten the

hub nut to the specified torque using the
special tool (DAF no. 0694894), see
"Technical data"'.
A800148

2.2 CHECKING THE HUB OIL LEVELS

}
1.
To prevent skin injury, avoid
unnecessary contact with the
drained oil.

Position the vehicle on a level surface.

2. Position the wheels so that the arrow on the

hub is pointing upwards.

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 Torx wrench

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data". A
M8009

2.3 DRAINING AND FILLING, DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Checking the oil level, first axle

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A). The

oil level should have reached the level
check/filler opening.

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

Checking the oil level, second axle

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A). The

oil level should have reached the level A
check/filler opening.

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

B M8013

2.4 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.

2.5 CHECKING THE HUB AND WHEEL BEARINGS

6 1. Inspect the bearings for damage at the

2. If the outer race of the bearing is loose in the

hub or has turned in the hub, the hub should
be replaced.

3. Check the axle journal screw thread, the

bearing surfaces of the inner bearing races
and the running surface of the seal for
damage.

4. Check the wheel speed sensor ring for

damage. Replace the ring at even the
slightest trace of damage.

2.6 CHECKING THE WHEEL SPEED SENSOR RING

1. Remove the wheel hub. See "Removal and

installation".

2. Check the sensor ring (1) for deposits.

Special attention should be paid to deposits 1 2
between the teeth of the sensor ring.
Clean the sensor ring if necessary.

3. Check the sensor ring (1) for damage. Even

the slightest damage can cause a failure. If
necessary replace the sensor ring.

4. If possible, the sensor ring (1) should be

checked for the maximum admissible axial
end play. See "Technical data".

5. Check the sensor (2) for freedom of

movement. A8 00 347
If necessary, clean the sensor and apply new
grease.

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, ENTIRE REAR AXLE

Removing the entire rear axle

1. Block the front wheels using chocks.

2. Slacken the central bolt of the spring-brake

cylinder as much as possible.

3. Apply the parking brake.

4. Remove the air pipes and wiring.

5. Remove the prop shaft from the drive flange.

6. Loosen the shock absorbers on the bottom.

7. Loosen the control rod of the ALR valve.

8. Support the vehicle securely with stands

under the chassis side members.

9. Remove the axle suspension/guide.

Take precautionary measures to make sure
that the axle does not tilt during removal of
6
the axle suspension/guide.

10. If possible, the entire rear axle with wheels

should be rolled from under the vehicle.

Installing the entire rear axle

1. Install the entire rear axle with wheels under
the vehicle.

2. Fit the axle suspension/guide.

Make sure that the torque-rod supports are
fitted so that arrow A on the support points in
the driving direction.

3. Fit the control rod of the ALR valve.

Note:
Check the setting of the ALR valve following
installation of the rear axle.

4. Fit the shock absorbers (if applicable).

5. Fit the prop shaft to the drive flange.

6. Connect the electrical wiring and fit the air

pipes.

7. Tighten the central bolt of the spring-brake A

cylinder.

A800045

3.2 REMOVAL AND INSTALLATION, AXLE SHAFTS

Removing axle shafts

A800139

3. Remove the axle-shaft attachment bolts.

6 4. Remove the axle shaft using special tool B
(DAF no. 0694980), if required, see (B).
When the axle shaft comes loose, a small
amount of oil may leak out. Collect this oil.

A8 00 351

Installing axle shafts

1. Clean the mating surfaces of the axle shaft
flange and wheel hub unit.

2. Apply sealant to the mating surface of the

axle shaft flange. See "Technical data".

3. Fit the axle shaft. Tighten the axle shaft

attachment bolts to the specified tightening
torque, see "Technical data".

4. Activate the differential lock and remove the

special tool from the differential lock. Install
the switch.

3.3 REMOVAL AND INSTALLATION, WHEEL HUB

6 8
5 7

4
2 3
1

A8 00 425

6 Removing the wheel hub

1. Jack up the rear axle and support the axle on
stands.

2. Remove the wheels.

3. Release the brakes.

4. Remove the brake drum.

5. Remove the axle shaft.

6. Remove the lock nut (1) using special tool

(DAF no. 0694894).

7. Remove the circlip (2).

8. Remove the hub nut (3) using special tool

(DAF no. 0694894).

9. Remove the wheel hub from the axle journal.

Installing the wheel hub

1. Replace the wheel hub oil seal.

2. Oil the axle journal and the inner and outer

bearing and slide the wheel hub over the axle
journal. Use the outer bearing as a guide.

3. Fit the hub nut and adjust the wheel bearing

play. See "Inspection and adjustment".

4. Press the wheel speed sensor (2) up against

the sensor ring (1). 1 2
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

5. Fit the axle shaft.

6. Fit the brake drum.

7. Put the wheels back on.

8. Adjust the brakes.

A8 00 347

3.4 REMOVAL AND INSTALLATION, HUB SEAL/WHEEL SPEED SENSOR RING

UNIT

Removing the hub seal/wheel speed sensor

ring
1. Remove the hub from the axle journal.

2. Fit special tool (3) (DAF no. 1329411) to

the impact puller (2), special tool
(DAF no. 0694928). 1
Fit the special tool (3) behind the seal/sensor
ring (1).
Use the impact puller (2) to pull the seal/ 2
sensor ring (1) evenly from the hub.
Once removed, the seal/sensor ring cannot
be reused.

3
S7 00 424

Installing the hub seal/wheel speed sensor

6 ring

A B C D E F

1 2 3 H I K L

4 G

S7 00 405
1. Check the recess for the seal/sensor ring (4)
in the hub (2) for damage.

2. Use the special tool (DAF no. 1240036) to

install the seal/sensor ring (4).

3. Assemble the special tool: turn the threaded

ends (A) and (L) into the centring spindle (E).
Assemble the short stud (L) on the side
where the pin has been fitted into the
centring spindle (E).

4. Slide the appropriate centring flange (F) over E F

the centring spindle (E).

5. Install the inner wheel bearing (3).

Insert the centring spindle (E) together with
the centring flange (F) into the hub (2).

6. Press the centring flange (F) into the inner

wheel bearing (3).
3 H I K L
7. Slide the appropriate centring flange (D) on
the centring spindle (E).

8. Fit the retaining plate (C) and the nut (B) on

the centring spindle (E).

9. Align the centring flange (D) on the outer

race of the outer wheel bearing and hand- 4 G
2
tighten nut (B) (max. 20 Nm). The centring
spindle (E) must be installed in the hub (2) 6
free of play. S7 00 411

10. Fit the ring (G) on the draw-in flange (H).

11. Position the seal/sensor ring (4) in front of

the hub (2).
Slide the draw-in flange (H) with the washer
(G) over the centring spindle (E) against the
seal/sensor ring (4).

12. Fit the retaining plate (I) and the nut (K).

13. Press the seal/sensor ring (4) evenly into the

hub (2) using nut (K), until the sensor ring
abuts the hub (2).

14. Remove the special tool.

15. Apply grease to the sealing lips of the seal/

sensor ring (4).

16. Fit the hub on the axle journal.

3.5 REMOVAL AND INSTALLATION, WHEEL BEARINGS

Removing wheel bearings

1. Remove the wheel hub.

2. Remove the hub seal.

3. Remove the bearing cages. A

4. If the wheel bearings should be replaced, the
outer bearing races can be tapped from the
hub using a driving tool. For this purpose, the
hub has been fitted with two recesses (A)
and (B).

Installing wheel bearings

B
1. Clean the bearings and check them for signs
of damage.
M8120

2. Use a driving tool and a hydraulic press to

install the outer races into the hub. You can
also tap the outer races evenly into the hub
using a driver.

6 3. Fit the wheel hub.

4. Tighten the adjusting nut to a torque of 100

Nm and turn the hub a few revolutions so that
the wheel bearings can set.

5. Retighten the adjusting nut to a torque of 100

Nm and adjust the wheel bearing play, see
"Inspection and adjustment, wheel
bearings".

3.6 REMOVAL AND INSTALLATION, DRIVE FLANGE

Removing the drive flange

1. Remove the prop shaft from the drive flange.
A B
2. Fit the special tool (B) (DAF no. 0484977) on
the drive flange to prevent the flange from
rotating. Remove the drive-flange nut using a
torque amplifier (A).

3. Remove the drive flange. If necessary, use a

puller.

Installing the drive flange

1. Before installation check the drive flange
along the oil-seal running surface for
grooves and/or sharp edges. If required,
replace the drive flange.

2. Fit the drive flange.

3. Apply a small amount of grease to the first

turn of the drive-flange nut.

4. Apply locking compound to the screw thread.

6
See "Technical data". A8 00 357

5. Fit the special tool (B) (DAF no. 0484977) on

the drive flange to prevent the flange from
rotating. Fit the drive-flange nut. Use a
torque amplifier (A) to tighten the drive-
flange nut to the specified tightening torque,
see "Technical data".

6. Fit the prop shaft to the drive flange.

3.7 REMOVAL AND INSTALLATION, INPUT SHAFT PINION OIL SEAL

Removing the input shaft pinion oil seal

Installing the input shaft pinion oil seal

1. Use the special tool (DAF no. 1240105) to fit
the seal so that the inscription "outside" is
pointed outwards.

2. Fit the drive flange.

A8 00 360

3.8 REMOVAL AND INSTALLATION, OUTPUT SHAFT PINION OIL SEAL

6 Removing the output shaft pinion oil seal
1. Remove the drive flange.

2. Drill two holes into the seal and screw the

A B
special tool (B) (DAF no. 0484899) into the
seal. Pull the oil seal from the pinion housing
using the special tool (A)
(DAF no. 0694928).

Installing the output shaft pinion oil seal

1. Use a stamp (DAF no. 1240106) to fit the
seal so that the inscription "outside" is
pointed outwards.

2. Fit the drive flange.

A8 00 426

3.9 REMOVAL AND INSTALLATION, DIFFERENTIAL

Removing the differential

1. Drain the oil from the differential, see
"Draining and filling".

2. Remove the prop shaft from the drive flange.

3. Remove the axle shafts.

4. Remove the air connection for the differential

lock.

5. Attach the differential securely to a lifting

device.

6. Remove the attachment bolts from the

differential.

7. Remove the differential from the axle

housing using two jacking screws.

Installing the differential

1. Clean the mating surfaces of the axle
housing and the differential housing. Regrind
the mating faces lightly. Do not damage the
6
mating faces in the process.

2. Clean and degrease the attachment bolts.

Apply locking compound to the attachment
bolts. See "Technical data".

3. Apply a thin, even layer of sealant to the

mating surface and around the bolt holes of
the axle housing, see "Technical data".

4. Fit the differential into the axle housing.

Install the attachment bolts and tighten them
evenly. Tighten the attachment bolts to the
specified torque. See "Technical data".

5. Fit the air connection to the differential lock.

6. Fit the axle shafts.

7. Fit the prop shaft to the drive flange.

8. Fill the differential with oil, see "Draining and

filling".

3.10 REMOVAL AND INSTALLATION, DIFFERENTIAL LOCK

Removing the differential lock

1. Remove the differential.

}
2.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

differential lock. Remove the special tool (A).

Evenly de-aerate the differential lock.

3. Remove the attachment bolts (1) from the 2

cylinder cover (2). Remove the cover.

1
A8 00 353

6 4.

5.
Remove the piston (5).

Remove the shifting fork (3) and the sliding

sleeve (1) with the spring (2).

Installing the differential lock

1. Fit the shifting fork (3) and the sliding sleeve 4
(1) with the spring (2).

4. Install the cylinder cover and tighten the

attachment bolts evenly. Tighten the
attachment bolts to the specified tightening
torque, see "Technical data".

}
5.
Do not come near the selector sleeve
when de-aerating the differential
lock.

Pressurise the air connection of the

A
differential lock. Fit special tool (A)
(DAF no. 1329447), so that the differential
lock is blocked.

6. Install the differential.

A8 00 346

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING, HUB

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the hub

1. Position the vehicle on a level surface.

2. Position the wheels so that the level check/

filler plug (A) is at the underside.

3. Remove the level check/filler plug (A) and

drain the oil.

Filling the hub

1. Position the vehicle on a level surface.

2. Position the wheels so that the level check/ A

filler plug (A) is on the top.

3. Fill the hub with the specified quantity of oil.

See "Technical data". M8010
6
4. Check the oil level after approximately
5 minutes. See "Inspection and adjustment".

5. Fit the plug using the special Torx wrench

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".

4.2 DRAINING AND FILLING, DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the differential, first axle

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A) and

drain plug (B). Drain the oil.

3. Fit the drain plug (B) using the special Torx

wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

Filling the differential

1. Fill the differential via the level check/filler
plug (A) with the specified quantity of oil, see
"Technical data".

2. Check the oil level after approx. 5 minutes.

The oil level should now have reached the
6 level check/filler opening. See 'Inspection
and adjustment".

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

Draining the differential, second axle

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A) and

drain plug (B). Drain the oil. A
3. Fit the drain plug (B) using the special Torx
wrench (DAF no. 1329493) and tighten to
the specified torque; see "Technical data".

Filling the differential

1. Fill the differential via the level check/filler
plug (A) with the specified quantity of oil, see
"Technical data".

2. Check the oil level after approx. 5 minutes.

The oil level should now have reached the B M8013
level check/filler opening. See 'Inspection
and adjustment".

3. Fit the level check/filler plug (A) using the

special Torx wrench (DAF no. 1329493) and
tighten to the specified torque; see
"Technical data".

CONTENTS
7 Tandem rear axle 1355T

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Description of 1355T, general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Overview drawing, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Inspection and adjustment, wheel bearing play. . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.2 Checking the hub oil levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424
2.3 Checking the differential oil level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 . . . . . 200424
2.4 Checking the operation of the differential lock. . . . . . . . . . . . . . . . . . . . . . 2-4 . . . . . 200424
2.5 Checking the hub and wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 . . . . . 200424
2.6 Checking the wheel speed sensor ring . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Removal and installation, entire rear axle . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Removal and installation, axle shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Removal and installation, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 . . . . . 200424
3.4 Removal and installation, hub seal/wheel speed sensor ring unit . . . . . . . 3-8 . . . . . 200424
3.5 Removal and installation, drive flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 . . . . 200424
3.6 Removal and installation, input shaft pinion oil seal . . . . . . . . . . . . . . . . . 3-11 . . . . 200424
3.7 Removal and installation, output shaft pinion oil seal . . . . . . . . . . . . . . . . 3-12 . . . . 200424
3.8 Removal and installation, differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 . . . . 200424
3.9 Removal and installation, differential lock . . . . . . . . . . . . . . . . . . . . . . . . . 3-14 . . . . 200424

4. DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Draining and filling, hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424 7
4.2 Draining and filling the differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 . . . . . 200424

1. GENERAL
1.1 DESCRIPTION OF 1355T, GENERAL

The 1355T tandem gear is a double-drive tandem

gear with hub reduction. The rear-axle housing is
of a very light but rigid construction. Due to this
construction the banjo-housing cover is not
welded to the axle housing but attached using
bolts. These bolts, which run right through the
axle housing, also attach the differential to the
axle housing.
In the first axle the torque is divided over the first
and second axle. To enable speed differences
between the two axles, a so-called third
differential is installed. If required, the differential
can be locked. Via the axle shafts the torque is
transferred to the wheel hubs, where, using a
second reduction, the torque is used to drive the
wheels.

1.2 OVERVIEW DRAWING, WHEEL HUB

38
35
13 36

12
14
15
25
34
27 24
23
11 10

29
33
26 31
22 39
33 37 8
29
21 28
47 32 30
16
18
2 17

7
19 3
6
7

1
9

4
46
43

41-42 44
A8 00 349

1. Hub
2. Brake drum
3. Wheel stud
4. Nut
5. Grease retainer
6. Oil seal
7. Taper roller bearing
8. Bush
9. Taper roller bearing
10. Flange bolt
11. Attachment plate
12. Hub nut
13. Gear wheel
14. Thrust washer
15. Ring
16. Stud bolt
17. Spring washer
18. Sealing ring
19. Nut
20. Cap screw
21. Magnet plug
22. Yoke pin
23. Circlip
24. Ring
25. Gear wheel
26.
27.
O-ring
Support 7
28. Shaft
29. Shim
30. Hub
31. Needle bearing
32. Circlip
33. Shim
34. O-ring
35. Flange bolt
36. Locking plate
37. Plug
38. Holder
39. Shim
40. Cap screw
41. Flange bolt
42. Flange nut
43. Grommet
45. Bracket
46. Cap
47. Hub cap
48. Cover
49. Pin

2. INSPECTION AND ADJUSTMENT

2.1 INSPECTION AND ADJUSTMENT, WHEEL BEARING PLAY

1. Remove the wheel hub. See "Removal and

installation".

2. Remove the hub seal. See "Removal and

installation".

3. Fit the wheel hub without the hub seal.See

"Removal and installation".

4. Turn a rope several times around the hub

5. The pre-load of the wheel bearings can be

changed by removing or fitting spacers
between the spacer sleeve and the inner
wheel bearing. See "Removal and
A800039
installation".

2.2 CHECKING THE HUB OIL LEVELS

}
1.
To prevent skin injury, avoid
unnecessary contact with the
drained oil.

Position the vehicle on a level surface.

2. Position the wheels so that the arrow on the

hub is pointing upwards.

3. Remove the level check plug (A). The oil

level should have reached the opening.

4. Fit the level check plug (A) using the special

Torx wrench (DAF no. 1329493) and tighten
to the specified torque; see "Technical data".

7
A8 00 365

2.3 CHECKING THE DIFFERENTIAL OIL LEVEL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Checking the oil level, first axle

1. Position the vehicle on a level surface.

2. Remove the level check/filler plug (A). The

oil level should have reached the level
check/filler opening.
A B
3. Fit the plug using the special Torx wrench
(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".

M8049

Checking the oil level, second axle

1. Position the vehicle on a level surface.
A
2. Remove the level check/filler plug (A). The
oil level should have reached the level 7
check/filler opening.

3. Fit the plug using the special Torx wrench

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".
B

M8050

2.4 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.

2.5 CHECKING THE HUB AND WHEEL BEARINGS

1. Inspect the bearings for damage at the

2. If the outer race of the bearing is loose in the

hub or has turned in the hub, the hub should
be replaced.

3. Check the axle journal screw thread, the

bearing surfaces of the inner bearing races
and the running surface of the seal for
damage.

4. Check the wheel speed sensor ring for

damage. Replace the ring at even the
slightest trace of damage.

2.6 CHECKING THE WHEEL SPEED SENSOR RING

1. Remove the wheel hub. See "Removal and

installation".

2. Check the sensor ring (1) for deposits.

Special attention should be paid to deposits 1 2
between the teeth of the sensor ring.
Clean the sensor ring if necessary.

3. Check the sensor ring (1) for damage. Even

the slightest damage can cause a failure. If
necessary replace the sensor ring.

4. If possible, the sensor ring (1) should be

checked for the maximum admissible axial
end play. See "Technical data".

5. Check the sensor (2) for freedom of

movement. A8 00 347
If necessary, clean the sensor and apply new
grease.

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, ENTIRE REAR AXLE

Removing the entire rear axle

1. Block the front wheels using chocks.

2. Slacken the central bolt of the spring-brake

cylinder as much as possible.

3. Apply the parking brake.

4. Remove the air pipes and wiring.

5. Remove the prop shaft from the drive flange.

6. Loosen the shock absorbers on the bottom.

7. Loosen the control rod of the ALR valve.

8. Support the vehicle securely with stands

under the chassis side members.

9. Remove the axle suspension/guide.

Take precautionary measures to make sure
that the axle does not tilt during removal of
the axle suspension/guide.

10. If possible, the entire rear axle with wheels

should be rolled from under the vehicle.
7
Installing the entire rear axle
1. Install the entire rear axle with wheels under
the vehicle.

2. Fit the axle suspension/guide.

Make sure that the torque-rod supports are
fitted so that arrow A on the support points in
the driving direction.

3. Fit the control rod of the ALR valve.

Note:
Check the setting of the ALR valve following
installation of the rear axle.

4. Fit the shock absorbers (if applicable).

5. Fit the prop shaft to the drive flange.

6. Connect the electrical wiring and fit the air

pipes.

7. Tighten the central bolt of the spring-brake A

cylinder.

A800045

3.2 REMOVAL AND INSTALLATION, AXLE SHAFTS

Removing axle shafts

1. Jack up the rear axle and support the axle on
stands.

2. Activate the differential lock and install the

special tool (DAF no. 0694836) at the
position of the switch.

A800046

3. Drain the hub oil. See "Draining and filling".

4. Remove the attachment bolts from the hub

cap and remove the hub cap.

5. Pull the axle shaft from the wheel hub.

A800289

Installing axle shafts

1. Fit the axle shaft into the wheel hub.

2. Turn the planet-gear shafts so that the flat

sides point outward.

3. Check the O-ring in the hub cap. If

necessary, replace the O-ring and apply
silicone grease.

4. Check the O-ring in the hub cap. If

necessary, replace the O-ring. Apply silicone
grease to the O-ring.

5. Install the spring assembly. Tighten the

attachment bolts to the specified torque. See
"Technical data".

6. Fill the hub with oil. See "Draining and filling".

A800040

7. Remove the special tool from the differential

lock and fit the switch again.

A800046

3.3 REMOVAL AND INSTALLATION, WHEEL HUB

Removing the wheel hub

1. Jack up the rear axle and support the axle on
stands.

2. Remove the wheels.

3. Release the brakes and remove the brake

drum.

4. Mark the hub at the semicircular hole in the

cover.

5. Drain the oil. See "Draining and filling".

6. Remove the hub cap.

7. Remove the axle shaft.

7
A800290

8. Remove the attachment nuts and tapered

spring washers.
Remove the planet-gear set from the hub
using three jacking screws.

Note:
Make sure that the planet-gear set is put
down with the circlips facing upward. This
will prevent the pins from falling out.

9. Remove the thrust washer from the axle

journal.

10. Remove the attachment bolts from the

locking plate and remove the locking plate.

A800107

11. Remove the hub nut using special tool

(DAF no. 0535705) and a torque amplifier
(ratio 1 : 5).

12. Support the hub and pull it from the axle

journal. The annular-gear carrier with the
annular gear, the bearings and the spacer
sleeve with spacer rings will be removed at
the same time.

13. Remove the annular-gear carrier with the

annular gear from the hub.

Installing the wheel hub

A800038

Note:
If you have not replaced the wheel bearings and
intend to reuse the original spacer sleeve with
spacer rings, you need not readjust the wheel
bearing pre-load.

If the wheel bearings have been replaced, the

wheel bearing pre-load should be re-adjusted,
see chapter "Inspection and adjustment".
You must adjust the wheel bearing pre-load
before fitting the hub seal.
1. Replace the hub seal.

2. Check the components for signs of wear

and/or damage.
7
3. Replace the O-rings.

4. Apply oil to the wheel bearings.

5. Fit the hub on the axle journal.

6. Fit the original spacer sleeve and spacer

rings.

7. Fit the inner race of the outer wheel bearing

on the axle journal.

8. Fit the annular-gear carrier with the annular

gear into the hub and on the splines of the
axle journal.

9. Fit the hub nut and tighten it using special

tool (DAF no. 0535705) and a torque
amplifier (ratio 1 : 5).
Tighten the hub nut to the specified
tightening torque, see "Technical data".
Turn the hub nut while tightening it.

A800038

10. Fit the locking plate. Apply locking

compound to the attachment bolts and
tighten them to the specified torque. See
"Technical data".

11. Install the thrust washer.

7
A800107

12. Fit the planet-wheel set in its original position

in the hub (watch the markings).

13. Install the tapered spring washers and

tighten them to the specified torque. See
"Technical data".

14. Fit the axle shaft.

15. Check the O-ring in the hub cap. If

necessary, replace the O-ring. Apply silicone
grease to the O-ring.

16. Install the spring assembly. Tighten the

attachment bolts to the specified torque. See
"Technical data".

17. Fill the hub with oil. See "Draining and filling".
A800290

18. Press the sensor (2) against the sensor

ring (1). 1 2
While the vehicle is being driven, the air gap
between the sensor and the sensor ring is
adjusted automatically.

A8 00 347

3.4 REMOVAL AND INSTALLATION, HUB SEAL/WHEEL SPEED SENSOR RING

UNIT

Removing the hub seal/wheel speed sensor

ring
1. Remove the hub from the axle journal.

2. Fit special tool (3) (DAF no. 1329411) to the

3
S7 00 424

Installing the hub seal/wheel speed sensor

ring

7
A B C D E F

1 2 3 H I K L

4 G

S7 00 405
1. Check the recess for the seal/sensor ring (4)
in the hub (2) for damage.

2. Use the special tool (DAF no. 1240036) to

install the seal/sensor ring (4).

3. Assemble the special tool: turn the threaded

ends (A) and (L) into the centring spindle (E).
Assemble the short stud (L) on the side
where the pin has been fitted into the
centring spindle (E).

4. Slide the appropriate centring flange (F) over E F

the centring spindle (E).

5. Install the inner wheel bearing (3).

Insert the centring spindle (E) together with
the centring flange (F) into the hub (2).

6. Press the centring flange (F) into the inner

wheel bearing (3).
3 H I K L
7. Slide the appropriate centring flange (D) on
the centring spindle (E).

8. Fit the retaining plate (C) and the nut (B) on

the centring spindle (E).

9. Align the centring flange (D) on the outer

race of the outer wheel bearing and hand- 4 G
2
tighten nut (B) (max. 20 Nm). The centring
spindle (E) must be installed in the hub (2)
free of play. S7 00 411

10. Fit the ring (G) on the draw-in flange (H).

7
11. Position the seal/sensor ring (4) in front of
the hub (2).
Slide the draw-in flange (H) with the washer
(G) over the centring spindle (E) against the
seal/sensor ring (4).

12. Fit the retaining plate (I) and the nut (K).

13. Press the seal/sensor ring (4) evenly into the

hub (2) using nut (K), until the sensor ring
abuts the hub (2).

14. Remove the special tool.

15. Apply grease to the sealing lips of the seal/

sensor ring (4).

16. Fit the hub on the axle journal.

3.5 REMOVAL AND INSTALLATION, DRIVE FLANGE

Removing the drive flange

1. Remove the prop shaft from the drive flange.

2. Fit the special tool (B) (DAF no. 0484977) on

A B
the drive flange to prevent it from rotating.
Remove the drive flange nut using a torque
amplifier (A).

3. Remove the drive flange. If necessary, use a

puller.

Installing the drive flange

1. Before installation check the drive flange
along the oil-seal running surface for
grooves and/or sharp edges. If required,
replace the drive flange.

2. Fit the drive flange.

3. Apply a small amount of oil to the abutting

surface of the drive-flange nut.

4. Apply locking compound to the screw thread.

See "Technical data".

7 5. Fit the special tool (B) (DAF no. 0484977) on A8 00 358

the drive flange to prevent the flange from

rotating. Fit the drive-flange nut. Use a
torque amplifier (A) to tighten the drive-
flange nut to the specified tightening torque,
see "Technical data".

6. Fit the prop shaft to the drive flange.

3.6 REMOVAL AND INSTALLATION, INPUT SHAFT PINION OIL SEAL

Removing the input-shaft seal

1. Remove the drive flange.

2. Remove the attachment bolts from the

bearing-house cover and remove the
bearing-house cover.

3. Remove the seal from the bearing-house

cover.

Installing the input-shaft oil seal

1. Clean the mating surfaces of the bearing-
house cover and the differential housing.

2. Lightly grease the bearing cover and, using a

stamp (DAF no. 1240089), install the oil seal
so that the inscription "outside" points
outward.
A800053

3. Apply a thin film of the specified sealant on

the surface to which the bearing-house cover
is fitted, see "Technical data".

4. Fit the bearing-house cover. Tighten the

attachment bolts to the specified torque. See
"Technical data". 7
5. Fit the drive flange.

A800055

3.7 REMOVAL AND INSTALLATION, OUTPUT SHAFT PINION OIL SEAL

Removing the output shaft pinion oil seal

1. Remove the drive flange.

2. Drill two holes into the seal and screw the

A B
special tool (B) (DAF no. 0484899) into the
seal. Pull the oil seal from the pinion housing
using the special tool (A)
(DAF no. 0694928).

Installing the output shaft pinion oil seal

1. Use a stamp (DAF no. 1240106) to fit the
seal so that the inscription "outside" is
pointed outwards.

2. Fit the drive flange.

A8 00 426

3.8 REMOVAL AND INSTALLATION, DIFFERENTIAL

Removing the differential

7 1. Drain the oil from the differential and the
hubs.

2. Remove the prop shaft from the drive flange.

3. Remove the axle shafts.

4. Remove the air connection for the differential

lock.

5. Attach the differential securely to a lifting

device.

6. Remove the nuts from the attachment bolts

(B). These long bolts run through the A
differential housing.

7. Remove the two attachment bolts (A) from

the differential.

8. Remove the differential from the axle

housing.
B
A800047

Installing the differential

1. Clean the mating surfaces of the banjo
housing and the differential housing. Do not
damage the mating faces in the process.

2. Clean the nut and bolt flanges of the through

bolts.

3. Apply a thin, even film of the specified

sealant on the mating surface of the banjo
housing, see "Technical data". Make sure
that the sealant is applied correctly around
the bolt holes.

4. Apply the specified sealant to the nut and

bolt flanges of the through bolts, see
"Technical data".

5. Apply locking compound to the threads. See

"Technical data".

6. Fit the differential into the banjo housing.

7. Tighten the bolts and nuts to the specified

tightening torque, see "Technical data".

8. Fit the air connection to the differential lock. A800051

9. Fit the axle shafts.

7
10. Fit the prop shaft to the drive flange.

11. Fill the differential and the hubs with oil.

3.9 REMOVAL AND INSTALLATION, DIFFERENTIAL LOCK

Removing the differential lock

11 10 9 8 7 6 5 4 3 2 1

15 14 13 12

A800226
1. Remove the differential.

2. Remove the special tool (DAF no. 0694836).

7 3. Remove the attachment bolts (11).

4. Remove the cover (10) together with the

gasket (9).

5. Remove the cylinder housing (8) and

gasket (7). The piston (6) with sealing ring
(5) will come free.

6. Remove the selector shaft (2), the shifting

fork (12), the clutch body (13) and the
pressure spring (1).

7. Remove the selector sleeve (15).

Installing the differential lock

11 10 9 8 7 6 5 4 3 2 1

15 14 13 12

A800226
1. Fit the selector sleeve (15)

2. Fit the selector shaft (2) with the shifting fork

(12) and the clutch body (13) to the
differential housing. Make sure that the
tapered edge of the shifting fork is flush
against the shoulder of the axle. Do not fit the
pressure spring yet (1). 7
3. Unscrew the adjusting bolt (3) on the
selector shaft (2) so far that when the claws
fully engage, the top of the adjusting screw
remains under the mating surface of the
differential housing with the specified value.
See "Technical data".

Note:
The differential lock must be adjusted such
that the claws of the clutch body and
synchroniser shaft fully engage. In addition,
the shifting fork may not grind against the
edge of the groove in the clutch body. It is
especially important that the play between A800077
crown wheel/pinion gear is properly
adjusted.

4. Fit the pressure spring (1) between the

differential housing and the shifting fork (12).

5. Fit the sealing ring (5) to the piston of the

differential lock and lightly oil the piston.

6. Fit the piston (6) into the cylinder.

7. Fit the air connection at the correct position.

The air connection lip must point to the top of
the differential in the direction of the input
shaft.

8. Fit the locking cylinder (8) with the cover (10)

and the two gaskets (7) and (9) to the
differential housing. Tighten the attachment
bolts (11) to the specified torque. See
"Technical data".

9. Fit the special tool (DAF no. 0694836) so

that the differential lock is blocked.

10. Install the differential.

11. Fit the air connection to the differential lock.

12. Remove the special tool.

13. Fit the switch with the spring washer and

electrical connection.

4. DRAINING AND FILLING

4.1 DRAINING AND FILLING, HUB

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the hub

1. Position the vehicle on a level surface.

2. Position the wheels in such a way that the oil

drain/filler plug (A) is on the underside.

3. Remove the oil level check plug (B) and oil

drain/filler plug (A).

4. Drain the oil and let the oil leak out of the B
hub.

A8 00 363

Filling the hub

1. Position the wheels in such a way that the oil
drain/filler plug (A) is at the top.

2. Fill the hub with the specified quantity of oil.

See "Technical data".

3. Check the oil level after approximately

5 minutes. See "Inspection and adjustment". A
4. Fit the plugs using the special Torx wrench
(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".

A8 00 364

4.2 DRAINING AND FILLING THE DIFFERENTIAL

} To prevent skin injury, avoid

unnecessary contact with the
drained oil.

Draining the differential, first axle

1. Position the vehicle on a level surface.

2. Remove the drain plugs (B) and drain the oil.

Let all the oil leak out of the differential.

3. Fit the plugs using the special Torx wrench A B

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".

Filling the differential, first axle

1. Remove the level check/filler plug (A) and fill B
the differential with the specified quantity of
oil. See "Technical data".

2. Check the oil level after approximately M8049

5 minutes. See "Inspection and adjustment".

3. Fit the plug using the special Torx wrench

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".
7
Draining the differential, second axle
1. Position the vehicle on a level surface.
A
2. Remove the drain plug (B) and drain the oil.
Let all the oil leak out of the differential.

3. Fit the plug using the special Torx wrench

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data". B
Filling the differential, second axle
1. Remove the level check/filler plug (A) and fill
the differential with the specified quantity of
oil. See "Technical data".

2. Check the oil level after approximately

5 minutes. See "Inspection and adjustment".
M8050

3. Fit the plug using the special Torx wrench

(DAF no. 1329493) and tighten to the
specified torque; see "Technical data".

CONTENTS
8 Trailing axles

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Description of 09N075/09N220 trailing axle . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Overview drawing, 09N075 trailing axle hub . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424
1.3 Overview drawing, 09N220 trailing axle hub . . . . . . . . . . . . . . . . . . . . . . . 1-3 . . . . . 200424
1.4 Overview drawing, trailing-axle yoke attachment . . . . . . . . . . . . . . . . . . . 1-4 . . . . . 200424

2. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Removal and installation, wheel hub unit (09N075 trailing axle) . . . . . . . . 2-1 . . . . . 200424
2.2 Removal and installation, wheel hub (09N220 trailing axle) . . . . . . . . . . . 2-4 . . . . . 200424
2.3 Removal and installation, trailing axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 . . . . . 200424
2.4 Removal and installation, trailing-axle yoke. . . . . . . . . . . . . . . . . . . . . . . . 2-10 . . . . 200424

1. GENERAL
1.1 DESCRIPTION OF 09N075/09N220 TRAILING AXLE

Vehicles with a trailing axle are typically equipped

with a driven axle followed by a non-driven axle,
i.e. the trailing axle. If the axle load is so low that
this load can be carried by the driven axle only,
the trailing axle can be lifted.
The advantage of this is that tyres, brakes and
fuel are saved.
09N075 trailing axle
The 09N075 trailing axle is an air-suspended rigid
axle with a pneumatic lifting gear.
09N220 trailing axle
The 09N220 trailing axle can be either air-
suspended or leaf-sprung.
The air-suspended trailing axle is a rigid axle with
a pneumatic lifting gear.
With a leaf-sprung trailing axle, the driven rear
axle is suspended by spring assemblies which
are connected (hinged) at the front. On the other
side the spring assemblies are connected to the
trailing-axle wheel yoke using shackles. The lever
effect of the wheel yoke makes sure that the
trailing axle is also suspended. The trailing axle
may or may not be equipped with a hydraulic
lifting gear.
Wheel hub
The wheel hub, wheel bearings and hub oil seal
form a unit, also called the wheel hub unit (3). The 3 8
wheel bearings are a compact version.
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 2
type. The nut is locked by bending the lips on the
hub nut outward. 1
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.

A8 00 356

1.2 OVERVIEW DRAWING, 09N075 TRAILING AXLE HUB

7
5

4
3
2

8
9

1
A8 00 404
1. Attachment bolt
2. Hub cap
3. O-ring
8 4.
5.
Hub nut
Thrust washer
6. Wheel hub unit
7. Wheel stud
8. Wheel nut
9. Wheel nut cap

1.3 OVERVIEW DRAWING, 09N220 TRAILING AXLE HUB

5
6

2 3

1 7

8
9
A8 00 403

1. Attachment bolt
2. Hub cap
3.
4.
Hub nut
Thrust washer
8
5. Wheel hub unit
6. O-ring
7. Wheel stud
8. Wheel nut
9. Wheel nut cap

1.4 OVERVIEW DRAWING, TRAILING-AXLE YOKE ATTACHMENT

2
1

8
3 15
14 11
10 12
8 11
5 6 7

4
8 13
4
9
9

18
19

17
16

23
22
20 21
A8 00 402

1. Bearing support
2. Stop block
3. Bush
4. Lubricating nipple
5. Trailing-axle yoke cover
6. Flange seal
7. Adjusting nut
8. Bearing block
9. Nut
10. Stud bolt
11. Taper roller bearing
12. Oil seal
13. Pull-rod/push-rod
14. Oil seal
15. Sealing plate
16. Bearing-bush rings
17. Bearing bush
18. Trailing-axle yoke
19. Stop block
20. Nut
21. Sealing ring
22. Sealing ring
23. Pin

2. REMOVAL AND INSTALLATION

2.1 REMOVAL AND INSTALLATION, WHEEL HUB UNIT (09N075 TRAILING
AXLE)

7
5

4
3
2

8
9

1
8
A8 00 404

Removing the wheel hub unit (09N075 trailing

axle)
1. Lift the trailing axle and support it properly.

2. Remove the wheel.

3. Remove the brake calliper.

4. Remove the hub cap (2).

5. Remove the hub nut (4) using the special tool

set (DAF no. 1329496).
Fit the socket wrench (A) to the hub nut. Fit
the socket wrench guide (B) to the wheel hub
unit using four wheel studs. Loosen the nut
using a torque amplifier.

6. Remove the thrust washer (5).

B
S7 00 641

7. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

8. Remove the wheel hub unit (6) using a lifting

device. Take care that the wheel hub unit
does not rest on the guide bush (A) as the
latter is not strong enough to take the weight
of the wheel hub unit.

Installing the wheel hub unit

8 1. Check the axle journal thread carefully for

damage.

}
A
You must never fit a wheel hub unit
on an axle journal with a damaged S7 00 580
thread.

2. Apply a thin and even layer of the prescribed

lubricant to the entire circumference of the
axle journal, see "Technical data".

Note:
Do not overlubricate the axle journal. While
fitting the wheel hub unit, the excess grease
will collect at the backside of the wheel hub.
When the vehicle is used in daily operation,
this can leak out so that the seal wrongly
appears to be leaking.

S7 00 547

3. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

A
S7 00 561

4. Position the wheel hub unit (6) precisely in

front of the axle journal using a lifting device. 6
Slide the wheel hub unit (6) onto the axle
journal without twisting it. Take care that the
wheel hub unit does not rest on the guide
bush (A) as the latter is not strong enough to
take the weight of the wheel hub unit.

5. Fit the thrust washer (5). 5

6. Replace the hub nut (4). Apply a few drops of
4
3
oil to the abutting surface of the hub nut. Fit
the hub nut.
2

8
1
S7 00 581

7. Fit the hub nut (4) using the special tool set
(DAF no. 1329496).
Fit the socket wrench (A) to the hub nut. Fit
the socket wrench guide (B) to the wheel hub
unit using four nuts. Tighten the hub nut (4)
in the specified manner using a torque
amplifier, see "Technical data".

8. Fit a new O-ring (3) to the hub cap (2). A

9. Fit the brake calliper.

10. Fit the wheel.

B
S7 00 641

2.2 REMOVAL AND INSTALLATION, WHEEL HUB (09N220 TRAILING AXLE)

5
6

2 3

1 7

8
9
A8 00 403

Removing the wheel hub (09N220 trailing

8 axle)
1. Remove the attachment bolts (1) from the
hub cap (2) and remove the cap.

2. Lift the trailing axle and support it properly.

3. Remove the wheel.

4. Remove the brake calliper.

5. Remove the hub nut (3) using the hub nut

wrench (A), which is part of the special tool
set (DAF no. 1329496). Loosen the hub nut
(3), using a torque amplifier to do so.

6. Remove the thrust washer (4). A

A8 00 405

7. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

8. Attach the wheel hub unit (5) securely to a

movable lifting device. 5

9. Slide the wheel hub unit (5) from the axle

journal using the lifting device.
Take care that the wheel hub unit (5) does A
not rest on the guide bush (A) as the latter is
not strong enough to take the weight of the
wheel hub unit (5).

10. Remove the O-ring (6) from the wheel hub

unit (5).
A8 00 411
Installing the wheel hub
1. Check the axle journal thread carefully for
damage.

}
2.
You must never fit a wheel hub on an
axle journal with a damaged thread.

Fit the O-ring (6) into the wheel hub unit (5).
6

A8 00 412

3. Apply a thin and even layer of the prescribed

lubricant to the axle journal, see "Technical
data".

Note:
Do not overlubricate the axle journal. While
fitting the wheel hub unit, the excess grease
will collect at the backside of the wheel hub.
When the vehicle is used in daily operation,
this anti-corrosion agent can leak out so that
it looks as if the oil seal leaks.

A8 00 344

4. Install the guide sleeve (A), which is part of

the special tool set (DAF no. 1329496), on
the axle journal.

5. Attach the wheel hub unit (5) securely to a

movable lifting device.

6. Position the wheel hub unit (5) exactly in

front of the axle journal using the movable A
lifting device. Slide the wheel hub unit (5) on
the axle journal.
Take care that the wheel hub unit (5) does
not rest on the guide bush as the latter is not
strong enough to take the weight of the
wheel hub unit (5).

A8 00 343

7. Fit the thrust washer (4).

5
8. Replace the hub nut (3). Apply a few drops of
oil to the abutting surface of the hub nut (3).
Fit the hub nut (3).

8
A8 00 413

9. Fit the hub nut (3) using the hub nut wrench
(A), which is part of the special tool set
(DAF no. 1329496) and a torque amplifier.
Tighten the hub nut (3) in the specified
manner using a torque amplifier, see
"Technical data". A

10. Thoroughly clean the sealing surfaces of the

wheel hub and the hub cap.

11. Apply a sealant to one of the sealing

surfaces.

12. Fit the hub cap.

13. Fit the brake calliper.

A8 00 405
14. Put the wheels back on.

2.3 REMOVAL AND INSTALLATION, TRAILING AXLE

Removing the trailing axle

1. Remove the wheels from the trailing axle.

2. Loosen the shock absorbers at the top and

depress these as far as possible.

3. Remove the brake pipes and the cabling of

the disc brakes.

4. (Temporarily) fit the outer wheels of the

trailing axle.

5. Lower the trailing axle.

6. Safely lift the chassis rear until the

attachment bolts holding the bearing
supports to the chassis can be removed.

7. Remove the attachment bolts holding the

bearing supports to the chassis.

8
A8 00 408

8. Lift the chassis until the bearing supports are

clear of the chassis and the bottom pins of
the shackles are within reach.

9. Place a wooden block right and left between

the chassis member and the axle housing of
the driven axle.

10. Place suitable supports under the yokes

where the shackle is attached.

11. Remove the lower pins from the shackles.

A8 00 409

12. Insert a solid piece of pipe through the eye of

every yoke.

13. Position a trolley jack in the middle of the

pipe, supporting it.

14. Remove the supports and slowly lower the

pipe and the yokes.

15. Roll the trailing axle from under the chassis.

16. Slowly lower the chassis onto the wooden

blocks.

17. Take the rings out of the eyes of the yokes if

necessary.
A8 00 406

A800208

Installing the trailing axle

1. Fit the rings in the eyes of the yokes.

2. Raise the chassis. Support the chassis in a

8 3.
safe way.

Insert a solid piece of pipe through the eye of

every yoke.

4. Move the trailing axle under the chassis

using a trolley jack. Align the trailing axle and
the chassis.

A8 00 406

5. Attach the shackles to the yokes.

6. Lower the chassis.

A8 00 409

7. Fit the attachment bolts with the bolt heads

on the inside of the chassis. Tighten the
bolts.

8. Fit the brake pipes and cabling.

9. Tighten the shock absorbers at the top.

10. Put the wheels back on.

11. Check the brake pipe connections for leaks.

12. Lubricate the shackle pins.

A8 00 408
8

2.4 REMOVAL AND INSTALLATION, TRAILING-AXLE YOKE

Removing the trailing-axle yoke

1. Remove the trailing axle.

2. Support the trailing-axle yokes at the front

and back in a safe way, so that they are
horizontal.

A8 00 424

3. Remove the outer cover. Remove the

grease.

8
A8 00 416

4. Slacken the adjusting nut a couple of turns

using the special tool (DAF no. 1453122).
A

A8 00 414

5. Loosen the nuts (1, 2, 4 and 5) of the push/

pull rod (3).

1 2 3 4 5
A8 00 407

6. Mark the bearing blocks in relation to the

bearing support.

7. Remove the attachment nuts from the

A800210
8
bearing block. Remove the bearing support
from the bearing blocks.

A8 00 410

8. Remove the adjusting nut from the bearing

block.

A8 00 420

9. Remove the outer nut (1) of the push/pull

rod (3).

1 2 3 4 5

8
A8 00 407

10. Use two band irons to remove the outer

bearing block from the axle journal.
The bearing cage of the roller bearing will
remain on the axle journal and at the same
time retain the oil seal.

A800214

11. Remove the bearing cage from the axle

journal. Remove the oil seal from the axle
journal.

A8 00 417

12. Similarly remove the inner bearing block with

bearing and oil seal from the axle journal.

13. Tap the sealing plate off the inner bearing

from inside the bearing block, if the outer
race of the roller bearing must be removed.

Installing the trailing-axle yoke

1. Clean the axle journals and bearing blocks.

2. Clean and check all bearings for wear and

damage.

3. Apply new grease to the bearings.

8
4. Fit the bearing in the inner bearing block.

A8 00 418

5. Fit the seals at the indicated positions in the

bearing blocks.

A8 00 423

6. Lightly grease the axle journals.

7. Fit the inner bearing block to the axle journal.

A8 00 422

8. Fit the sealing plate and lock it by tapping the

centring edge inward in eight places.

A8 00 419

8 9. Fit the outer bearing block to the axle journal.

Make sure that the push/pull rod is inserted
through the eye of the bearing block.

A8 00 421

10. Fit the bearing in the outer bearing block.

11. Screw the adjusting nut several turns into the

bearing block.

12. Turn the outer nut (1) of the push/pull rod

onto the push/pull rod.

1 2 3 4 5
A8 00 407

13. Clean the contact surfaces of the bearing

blocks and bearing support. Check that all
adjusting bushes are present.

14. Fit the bearing blocks into their original

positions on the bearing support.
Evenly tighten the attachment nuts to the
specified torque.

8
A800219

15. Turn the inner nuts (2) and (4) of the push/
pull rod (3) against the bearing block.

16. Tighten the outer nuts (1) and (5) of the push/
pull rod (3) to the specified torque, see
"Technical data".

1 2 3 4 5
A8 00 407

17. Tighten the adjusting nut to the specified

torque using the special tool (A)
(DAF no. 1453122), see "Technical data"'.

18. Loosen the adjusting nut. Re-tighten the

adjusting nut to the specified torque. See
"Technical data".
A

A8 00 415

19. Fit a new gasket to the cover and fit the

cover. The lock cam on the inside of the
cover must fall into a recess in the adjusting
nut. If it does not, turn the adjusting nut to the
smallest angle (loosen or tighten) until the
lock cam falls into a recess.

20. Fit the cover attachment bolts.

21. Lubricate the bearing blocks until a collar of

grease is visible at the seals.

A800221

CONTENTS
9 Hydraulic lifting gear

Page Date

1. SAFETY INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

2. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Location of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424
2.2 System description, hydraulic part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424
2.3 Overview drawing, pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 . . . . . 200424
2.4 Overview drawing, 2/2 solenoid valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 . . . . . 200424
2.5 Overview drawing, 4/2 solenoid valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 . . . . . 200424
2.6 Overview drawing, pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 . . . . . 200424
2.7 Overview drawing, cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 . . . . . 200424

3. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Checking the system pressure and pressure switch . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Inspection and adjustment, pressure relief valve . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Checking internal leakage in the pump unit. . . . . . . . . . . . . . . . . . . . . . . . 3-4 . . . . . 200424
3.4 Bleeding of the hydraulic lifting gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 . . . . . 200424
3.5 Checking the fluid level in the hydraulic lifting gear . . . . . . . . . . . . . . . . . . 3-5 . . . . . 200424
3.6 Checking the cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 . . . . . 200424

4. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424

4.1 Removal and installation, pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200424
4.2 Removal and installation, 4/2 solenoid valve. . . . . . . . . . . . . . . . . . . . . . . 4-3 . . . . . 200424
4.3 Checking the fluid level in the hydraulic lifting gear . . . . . . . . . . . . . . . . . . 4-4 . . . . . 200424
4.4 Removal and installation, pressure relief valve . . . . . . . . . . . . . . . . . . . . . 4-5 . . . . . 200424
4.5 Removal and installation, cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 . . . . . 200424

5. DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200424

5.1 Disassembly and assembly, pump unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200424
5.2 Disassembly and assembly, 2/2 solenoid valve . . . . . . . . . . . . . . . . . . . . 5-4 . . . . . 200424

6.
5.3 Disassembly and assembly, cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 . . . . .

DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200424

200424
9
6.1 Filling the hydraulic lifting gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200424

1. SAFETY INSTRUCTIONS
1.1 SAFETY INSTRUCTIONS

- Repair and maintenance activities must only

be carried out while the trailing axle is
lowered.
When the trailing axle is lifted, the line
connected to line connection B (imprinted on
the pump unit) is pressurised.
- Stay at a safe distance from the moving parts
when activating the lifting gear.
- Avoid skin contact with hydraulic oil.
- Use T-pieces and couplings which are suited
for high system pressures when connecting
a pressure gauge.
- Before the pump unit is tested for internal
leakage, always begin by checking the
function of the pressure relief valve.
- Never stand in front of the piston rod when
testing the cylinder.
- The surface of the cylinder piston rods can
be easily damaged. Even the smallest
damage to the surface will result in leakage.

During repair or maintenance activities which

could cause damage to the piston-rod
surfaces, the trailing axle should be lowered.
In that case the piston rods will be retracted
into the cylinders.
During activities such as welding, grinding,
paint spraying and applying bitumen
coatings, it is especially important to cover
9
any cylinder-rod parts still protruding from
the cylinder.
Also cover the pipes.

2. GENERAL
2.1 LOCATION OF COMPONENTS

1 6 7
A

4 3 B

5
A8 00 247
1. Pressure switch
2. Pressure relief valve
3. 4/2 solenoid valve (lift trailing axle)
4. 2/2 solenoid valve (lower trailing axle)
5. Built-in non-return valve
6. + connection point (D1E1)
7. - connection point (D2E2)

A. Line connection (delivery line while

lowering)
B. Line connection (delivery line while lifting)
(The characters are imprinted on the
9
pump unit)

Relays, diodes and fuse

The relay, diodes and fuse that have a bearing on
the lifting gear of the trailing axle are stored in a
watertight box.
This box is fitted on the inside of the chassis on
the chassis main member.

2.2 SYSTEM DESCRIPTION, HYDRAULIC PART

The hydraulic part of the trailing axle load transfer

device is composed of a pump unit and two
parallel, double-acting cylinders. Both when lifting
and lowering the trailing axle, the pump will
deliver oil to the cylinders.
A B
The pump unit is composed of a gear pump which 4
is driven by an electric motor, a plastic reservoir
and a valve block.
The valve block is equipped with the following
valves: a non-return valve (6), the pressure relief 3
valve (2), the 4/2 valve "lift trailing axle" (3) and
the 2/2 valve "lower trailing axle" (4).
The valve block is also equipped with a pressure
switch (1).
When the lifting gear is not being operated, both
solenoid valves (3) and (4) will be deactivated.
1 2
6
M

A8 00 257

Lifting
- When the lifting-gear control switch is placed
in the "lifting" position, the pump relay and
the 4/2 solenoid valve (3) are activated.
The activated solenoid valve (3) connects A B
the pump delivery side to the space behind
9 the pistons in the cylinders. The space in
front of the pistons is connected to the
4
reservoir.
- The pump relay activates the pump, after
which oil is carried to the cylinders through 3
line connection B. Due to the pressure build-
up from the cylinders, the piston rods are
pushed from the cylinders, thus lifting the
trailing axle via the lever effect.
- When the trailing axle is fully lifted, the
pressure in the system will build up until the 1 2
switching value of the pressure switch (1) is 6
reached. The pressure switch (1) will
deactivate the pump motor. When the control M
switch is released, the 4/2 solenoid valve (3)
is deactivated.
- The non-return valve built into the 2/2
solenoid valve (4) keeps the line pressurised
and the trailing axle lifted.
A8 00 258

Lowering
- When the lifting-gear control switch is placed
in the "lowering" position, the pump relay and
the 2/2 solenoid valve (4) are activated.
- The activated solenoid valve will connect the A B
space behind the pistons to the reservoir. In
its neutral position the 4/2 solenoid valve (4) 4
connects the pump delivery side to the space
in front of the pistons in the cylinders.
- The pump relay activates the pump after
which oil is carried to the cylinders through 3
line connection A. Due to the pressure build-
up in the cylinders the piston rods are
retracted, thus lowering the trailing axle.
- When the pistons are fully retracted into the
cylinders, the pressure in the system will
build up until the switching value of the 1 2
pressure switch is reached. The pressure
switch will deactivate the pump motor. The 6
2/2 solenoid valve (4) remains activated for
approx. 2.5 minutes. M
- The line connected to line connection B will
be pressureless after deactivating the pump.
- The line connected to line connection A will
remain pressurised immediately after
deactivating the pump.
Due to minor internal leakage in the 4/2 A8 00 259
solenoid valve (3) the pressure in the line will
be slowly reduced after the pump is
deactivated. After approx. 5 minutes the
pressure in the line will have been be
reduced to approx. 5 bar.

2.3 OVERVIEW DRAWING, PUMP UNIT

11
1
2 12
3
13
4

14
5
23
21
6 15 22
19 20

16
7 17
8 18
9
10
32 33 34
31
29 30

28 35
27
36
26 38
24 25 37

9 39
40
45
44
41
42
43 53
48 52 54
51
49 50
47
46
A8 00 277

1. Nut
2. Spacer ring
3. O-ring
4. Coil
5. O-ring
6. 4/2 valve
7. O-ring
8. O-ring
9. O-ring
10. O-ring
11. Allen screw
12. O-ring
13. Coil
14. O-ring
15. 2/2 valve
16. O-ring
17. O-ring
18. Plastic ring
19. Clamping strap
20. O-ring
21. Cap
22. Gasket ring
23. Reservoir
24. Engine
25. O-ring
26. Coupling disc
27. Valve block
28. Non-return valve
29. Plug
30. Sealing ring
31. Allen screw
32. Pump

9
33. Sealing ring
34. Bolt
35. Return pipe
36. Clutch
37. O-ring
38. O-ring
39. O-ring
40. Pressure switch
41. O-ring
42. O-ring
43. Pressure relief valve
44. Clutch
45. Return pipe
46. O-ring
47. Clutch
48. Hose clamp
49. O-ring
50. Filter
51. Hose clamp
52. Supply pipe
53. Hose clamp
54. Inlet pipe

2.4 OVERVIEW DRAWING, 2/2 SOLENOID VALVE

1. Allen screw 1
2. O-ring
3. Coil 2
4. O-ring
5. Valve casing (2/2 valve)
3
6. O-ring
7. O-ring
8. Plastic ring
4

6
7
8

A8 00 251

9 1. Valve casing (2/2 valve)

2. O-ring
3. Adjusting ring(s)
1
4. Magnet core
5. Bush
6. Spring 2
7. Valve 3
8. Holder
9. O-ring 4
10. Plastic ring

5
6
7

8
9
10
A8 00 254

2.5 OVERVIEW DRAWING, 4/2 SOLENOID VALVE

1. Nut 1
2. Spacer ring 2
3. O-ring
4. Coil
3
5. O-ring 4
6. 4/2 valve
7. O-ring
8. O-ring
9. O-ring
5
10. O-ring
6

7
8
9
10

A8 00 252

2.6 OVERVIEW DRAWING, PRESSURE RELIEF VALVE

1. O-ring
2. O-ring
3. Pressure relief valve

1
2
3

A8 00 276

2.7 OVERVIEW DRAWING, CYLINDER

A B

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 2 1
A8 00 248

1. Circlip
2. Bearing
3. Dirt scraper
4. Circlip
5. O-ring
6. Spring clip
7. Sealing ring
8. Plastic ring
9. O-ring
10. Piston-rod guide
11. Piston rod
12. Cylinder
13. Piston
14. Plastic ring
15. Sealing ring
16 O-ring
17.
18.
Plastic ring
Nut 9
A Pipe connection
B Pipe connection

3. INSPECTION AND ADJUSTMENT

3.1 CHECKING THE SYSTEM PRESSURE AND PRESSURE SWITCH

1. Make sure that the trailing axle wheels are

fully lowered and on the ground.

2. Connect the pressure gauge, special tool

(DAF no. 0535653) to the pipe which is
connected to pipe connection B by a T-piece
(M16 x 1.5).

3. Lift the trailing axle and take the pressure

reading. Compare the reading with the
technical data. See "Technical data".
The pressure switch cannot be adjusted. If
the value deviates, the pressure switch
should be replaced. A8 00 278

4. Lower the trailing axle and remove the T-

piece and the pressure gauge.

5. Check the oil level in the reservoir and top up

if necessary.

3.2 INSPECTION AND ADJUSTMENT, PRESSURE RELIEF VALVE

Checking the pressure relief valve

1. Make sure that the trailing axle wheels are
fully lowered and on the ground.

2. Connect the pressure gauge, special tool

(DAF no. 0535653) to the pipe which is
B
connected to pipe connection B by a T-piece
(M16 x 1.5).
A
3. Detach the pressure switch connector.

4. Lift the trailing axle and take the pressure

reading. Release the control switch on the
dashboard immediately once the maximum
pressure is achieved.

Note:
If the pressure exceeds 200 bar, the control
switch on the dashboard should be released
immediately.
A8 00 281
5. Compare the reading with the technical data.
See "Technical data". Adjust the pressure
relief valve if the value deviates.

6. Fit the pressure switch connector.

7. Lower the trailing axle and remove the T-

piece and the pressure gauge.

8. Check the oil level in the reservoir and top up

if necessary.

9 Adjusting the pressure relief valve

1. Make sure that the trailing axle wheels are
fully lowered and on the ground.

2. Connect the pressure gauge, special tool

(DAF no. 0535653) to the pipe which is
connected to pipe connection‚ B by a T-piece
(M16 x 1.5).

3. Detach the pressure switch connector.

4. Loosen the lock nut (2) of the pressure relief

valve (3).

A8 00 280

5. Turn the adjusting bolt (1) using an Allen key.

During the adjusting process the trailing axle
should not be activated.
- Screwing the bolt in will increase the
pressure.
- Unscrewing the bolt will decrease the
pressure.
Turn the adjusting bolt (1) using small steps
of not more than 20. Measure the pressure
after each step.

Note:
As the pressure increases very rapidly, a
large turn of the adjusting bolt can result in
excessive system pressure causing
damage.

6. Lift the trailing axle and take the pressure

reading. Release the control switch on the
dashboard immediately once the maximum
pressure is achieved.
If the pressure exceeds 200 bar, the control
switch on the dashboard should be released
immediately.

7. If the measured value is still incorrect: 3

connect the pressure-switch connector
and lower the trailing axle. 2
1
8. Turn the adjusting bolt (1) once again.
A8 00 279
9. Remove the pressure switch connector.

10. Wait for approx. 2.5 minutes and take a new

reading. If necessary, repeat points 7 to 10
until the pressure setting is correct.

11. Tighten lock nut (2). Make sure that the

9
adjusting bolt (1) does not turn too.

12. Connect the connector of the pressure

switch, lower the trailing axle and check the 3
pressure again.
2
13. Remove the T-piece and pressure gauge. 1

14. Check the oil level in the reservoir and top up

A8 00 279
if necessary.

3.3 CHECKING INTERNAL LEAKAGE IN THE PUMP UNIT

1. Check the setting of the pressure relief valve

before conducting this test.

2. Lower the trailing axle. The wheels of the

trailing axle must rest on the ground.
B

3. Clean pipe connection B of the pump unit.

A
4. Remove the pipe from pipe connection B and
plug the pipe.

5. Connect the pressure gauge, special tool

(DAF no. 0535653), to pipe connection B so
that the pipe connection is also plugged.

6. Put the control switch into the "lifting"

position. The pressure will quickly increase
and the pressure switch will deactivate the
pump motor. Release the control switch.
A8 00 281
7. Take the pressure reading and check the
outward leakage. Leave the pump unit in
pressurised condition, also depending on the
complaint (how quickly the trailing axle will
be lowered by itself). If the pressure
decreases, the non-return valve in the 2/2
solenoid valve or the gasket of the 2/2
solenoid valve is leaking.

8. Activate the 2/2 solenoid valve manually

after the test using a 24V power supply. The
2/2 solenoid valve will be activated,
rendering pipe connection B of the pump unit

9 pressureless.

9. Remove the pressure gauge and reconnect

the piping.

10. Activate the lifting gear and check the oil

level in the reservoir. Inspect the pipe
connections for leaks.

3.4 BLEEDING OF THE HYDRAULIC LIFTING GEAR

The lifting gear is bled automatically. If

necessary, lift and lower the trailing axle several
times in a row.
The oil level in the reservoir should not fall below
the minimum level.
Note: after lowering the trailing axle, wait approx.
2.5 minutes before lifting the trailing axle.
If the switch is activated before this time span of
approx. 2.5 minutes elapses, the time will be
reset and you will have to wait about another
2.5 minutes before you can lift the trailing axle.

3.5 CHECKING THE FLUID LEVEL IN THE HYDRAULIC LIFTING GEAR

1. Make sure that the trailing axle wheels are

fully lowered and on the ground.

2. Check the fluid level. The liquid level must be

between the "min." and "max." level mark. If
necessary, top up.

3.6 CHECKING THE CYLINDER

A B

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 2 1
A8 00 248
1. After cylinder disassembly and assembly the
cylinder should be checked for internal and
external damage. See "Disassembly and
assembly".

2. Pull the entire length of the piston rod out of

the cylinder.

3. Connect a test pump with pressure gauge to

pipe connection B. Both pump and pressure
B
gauge should be able to handle a minimum
pressure of 220 bar.
A
4. Increase the pressure to the prescribed test
pressure, see "Technical data" and leave the
cylinder pressurised for some time.
Never stand in front of the piston rod when
increasing the pressure. If the spring clip (6)

9 is not installed correctly, the piston rod could

come out of the cylinder.

5. Check the cylinder for internal and external

leakage.

6. Push the piston rod completely into the A8 00 281

cylinder and plug the pipe connections after
completion of the test.

4. REMOVAL AND INSTALLATION

4.1 REMOVAL AND INSTALLATION, PUMP UNIT

} Before removing components, the

component concerned and the pipe
connections should be cleaned.
Working conditions should be very
clean as even the smallest impurity
can cause faults.

Removing the pump unit

1. The wheels of the trailing axle must rest on
the ground.

2. Remove the fuse from the lifting gear.

B
3. Mark the engine-wiring connection points
and disconnect these.
A
4. Mark the solenoid valve connectors and
disconnect these.

5. Remove the hydraulic lines from the pump

unit.
Note: the pipe attached to pipe connection A
may retain a residual pressure.
Wait for approx. 5 minutes after the trailing
axle has been lowered before disconnecting
the hydraulic lines from the pump unit.
Collect the oil coming from the pipe.
Plug the openings. A8 00 281

6. Remove the bolts (5). Remove the

support (1) and the attached pump unit (2).
9
7. Remove the bracket (3). 1
8. Remove the two attachment bolts (4) and lift 2
the pump unit from the support (1).

9. If a new pump unit is to be installed, the

position of line connections (A) and (B) 5 4
should be marked.

A8 00 287

Installing the pump unit

1. If a new pump unit is to be installed, the line
connections should be transferred. Make
sure that the line connections are connected
to the correct pump outputs.
- The line connection which is equipped
B
with M16 x 1.5 screw thread should be
fitted to output A.
- The line connection which is equipped A
with M18 x 1.5 screw thread should be
fitted to output B.

2. Fit the pump unit on its support.

3. Fit the bracket around the reservoir.

4. Fit the support on its chassis cross member.

5. Fit the pipes.

6. Reconnect the wiring and put the fuse back A8 00 281

in.

7. Fill the reservoir. See "Draining and filling".

8. Inspect the line connections for leaks.

9. Check the system pressure and the pressure

relief valve. See "Inspection and
adjustment".

4.2 REMOVAL AND INSTALLATION, 4/2 SOLENOID VALVE

Removing the 4/2 solenoid valve

1. Remove the connector.
1
2. Clean the valve and the surrounding area. 2
Work cleanly. 3
3. Remove the nut (1) at the valve top and take 4
the coil (4) from the valve.

4. Remove the valve (6) from the valve block.

5
5. The valve (6) itself cannot be disassembled.

Installing the 4/2 solenoid valve 6

1. Renew the O-rings and the sealing ring.

2. Apply a little oil to the valve (6) and install it

into the valve block. Tighten the valve to the
specified torque. See "Technical data".
7
3. Check the O-rings (3) and (5) on the top and 8
bottom of the coil (4) and fit it. 9
10
4. Turn the coil (4) into the desired position and
fit the spacer ring (2) with the nut (1).

5. Fit the connector.

A8 00 252
9

4.3 CHECKING THE FLUID LEVEL IN THE HYDRAULIC LIFTING GEAR

1. Make sure that the trailing axle wheels are

fully lowered and on the ground.

2. Check the fluid level. The liquid level must be

between the "min." and "max." level mark. If
necessary, top up.

4.4 REMOVAL AND INSTALLATION, PRESSURE RELIEF VALVE

Removing the pressure relief valve

1. Make sure that the trailing axle wheels are
fully lowered and on the ground.

2. Clean the valve and the surrounding area.

Work cleanly.

3. Remove the fuse from the lifting gear.

4. Remove the entire valve (3) from the valve

block.
1
5. The valve (3) itself cannot be disassembled. 2
If necessary, turn out the hexagonal socket 3
screw until the ball is lifted from its seat.
Subsequently purge the valve using
compressed air. Before unscrewing the Allen
A8 00 276
screw, first measure the length of the Allen
screw protruding from the valve. After
purging the valve, screw the Allen screw into
the valve to the same length.

Installing the pressure relief valve

1. Renew the O-rings(1) and (2). Apply a little
oil to the valve (3) and install it into the valve
block.
Tighten the valve to the specified torque.
See "Technical data".

2. Install the fuse.

3. Check the pressure and adjust if necessary.

See "Inspection and adjustment".
9

4.5 REMOVAL AND INSTALLATION, CYLINDER

Removing the cylinder

1. Make sure that the trailing axle wheels are
fully lowered and on the ground.

2. Clean the line connections and the

surrounding area.

3. Remove the fuse from the lifting gear.

4. Remove the shock absorber next to the

cylinder.
If the cylinder is located on the vehicle's left,
the linkage of the load-dependent brake-
control valve should also be removed.
B

5. Remove the lines from the lifting cylinder.

Note: the line attached to line connection A of A
the pump unit may retain a residual
pressure.
Wait for approx. 5 minutes after the trailing
axle has been lowered before disconnecting
the lines.
Collect the oil coming from the line.
Plug the openings.

6. Disconnect the lines of the central greasing

system, if applicable.

A8 00 281

7. Remove the pin (4) that connects the

cylinder (3) with the lever (5).

9 8. Remove the two bushes from the lever (5).

The cylinder will now point downwards,
causing part of the oil in the cylinder to flow 1 5
out.
2 3 4
9. Remove the attachment nut (2) and remove
the cylinder (3) from the chassis support (1). A8 00 283

Collect the oil still present in the cylinder.

Installing the cylinder

1. Clean the pivot points of the cylinder
connection. 5
4 4
2. Grease the chassis support pin. Fit the 2 3 3
cylinder on the pin. Hand-tighten the nut onto 1 6
the pin.

3. Check the bushes (3) and grease them. Fit

the bushes (3) to the lever (4).

4. Apply some grease to the connecting pin (6)

and install it in the bushes (3) with the nut
side pointing towards the chassis members.

5. Fit the lock washer (2) with the nut (1) to the
pin (6). Tighten the nut (1) to the specified
torque. See "Technical data". A8 00 284

6. Tighten the chassis support nut.

7. Connect the hydraulic lines.

8. Install the shock absorber and, if applicable,

the linkage of the load-dependent brake-
control valve.

9. Reconnect the lines of the central lubricating

system, if applicable.

10. Manually lubricate the turning points, or do

so using the central greasing system.

11. Install the fuse.

12. Activate the lifting gear several times. Check

the oil level in the reservoir and top up, if
necessary.
9
Inspect the line connections for leaks.

5. DISASSEMBLY AND ASSEMBLY

5.1 DISASSEMBLY AND ASSEMBLY, PUMP UNIT

11
1
2 12
3
13
4

14
5
23
21
6 15 22
19 20

16
7 17
8 18
9
10
32 33 34
31
29 30

28 35
27
36
26 38
24 37
9
25

39 45
40
44
41
42
43 53
48 52 54
51
49 50
47
46
A8 00 277

Disassembling the pump unit

1. Remove the pump unit from the vehicle, see
the chapter "Removal and installation".

2. Let the oil run from the reservoir.

3. Clean the entire pump unit and the

surroundings before disassembly. Work in
very clean conditions.

4. Remove the pressure relief valve, the 4/2

valve and the 2/2 valve, see chapter
"Removal and installation".

5. The built-in non-return valve (28) is very

difficult to remove from the valve block
because a very strong locking and sealing
compound has been applied to the screw
thread of the plug (29). Leave the non-return
valve in the valve block, if it is not necessary
to remove it.

6. Remove the pressure switch (40).

7. Loosen the clamping strip (19) and take the

reservoir (23) from the valve block (27).

8. If necessary, remove the return lines (35)

and (45) from the valve block (27). The lines
are clamped to the couplings (36) and (44).

9. Loosen the hose clamp (48) and take the

suction filter (50) out of the coupling (47).

10. Mark the position of the pump (32) relative to

the valve block (27) to facilitate installing the
pump. Remove the two attachment bolts (34)
at the back of the pump and remove the
pump (32) from the valve block (27).

11. Mark the position of the motor (24) relative to

the valve block (27). Remove the two
9 hexagonal socket screws (31) and remove
the motor from the valve block.

12. Remove the coupling disc (28) from the

valve block.

Assembling the pump unit

1. Check the components for signs of wear
and/or damage.
Check the suction pipe carefully.
When installing the parts, use new gaskets
and/or O-rings. Apply some grease to the O-
rings prior to installation.

2. Apply plenty of oil to the coupling disc (26)

and install the coupling disc in the valve
block (27). Make sure that the groove for the
motor is pointing towards the motor side.

3. Install the motor (24) on the valve block (27).

Tighten the attachment bolts (31) to the
specified torque. See "Technical data".

4. Install the pump (32) on the valve block (27).

Make sure that the pump drive shaft
engages the coupling disc (26). Check
whether the front of the pump is flush against
the valve block before tightening the
attachment nuts (34). Tighten the
attachment bolts to the specified tightening
torque, see "Technical data".

5. Install the pressure relief valve, the 4/2 valve

and the 2/2 valve, see chapter "Removal and
installation".

6. Install the pressure switch (40).

7. Connect the oil return lines (35) and (45).

8. Fit the filter (50). The cam on the filter must

fall into the groove of the pump cover.
Tighten hose clamp (48) securely.

9. Install the O-ring (20) and the reservoir (23).

The filler opening of the reservoir (23) is on
the side with the valves (40) and (43).
Tighten the reservoir using the clamping
strip (19).

10. Plug the line connections.

11. After installation of the pump unit in the

vehicle, the operation and adjustment of the
valves and the pressure switch should be
checked, see chapter "Inspection and
adjustment".
Check for external leakage.

5.2 DISASSEMBLY AND ASSEMBLY, 2/2 SOLENOID VALVE

} Disassemble the valve only to check

and/or to clean the internals. The
internal parts cannot be obtained
separately. In case of a fault, the
valve as a whole should be replaced.
Repair and maintenance activities
should be carried out in very clean
conditions as even the smallest
impurity can cause internal leakage
or can result in jamming of the valve.

Disassembling the 2/2 solenoid valve

1. Remove the valve from the pump, see the
chapter "Removal and installation".

2. Clamp the valve casing (1) with the

hexagonal head in the vice and remove the
holder (8).
1
3. Remove the holder (8) with the valve (7) from
the valve casing (1). Make sure that the
adjusting rings (3) are kept together. 2
3
4. Remove the spring (6) from the magnet-
core (4) pin.
4
5. Remove the magnet core (4) with the bush
(5) from the valve casing (1). Note down the
distance of the bush (5). 5
6
7

9 8
9
10
A8 00 254

Assembling the 2/2 solenoid valve

1. Check the sealing surfaces of the valve (7),
the holder (8) and the magnet-core (4) pin.

2. Check the freedom of movement of the

valve (7) in the holder (8).

3. Check the freedom of movement of the pin in

the magnet core (4).

4. Replace the O-ring (2) of the valve core (1)

and the O-ring (9) of the holder (8). Apply a
layer of grease to the O-rings.

5. Install the magnet core (4) with the bush (5)

into the valve casing (1). Make sure that the
bush (5) is fitted in its original position.

6. Fit the spring (6) on the pin of the magnet-

core (4).

7. Oil the valve (7) and slide the valve into the
holder (8). Check for freedom of movement.

8. Install the holder (8) with the adjusting ring(s)

(3) on the valve casing.

9. Install the valve in the pump unit, see the

chapter "Removal and installation".

5.3 DISASSEMBLY AND ASSEMBLY, CYLINDER

A B

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 2 1
A8 00 248

Disassembling the cylinder

1. Remove the cylinder from the vehicle, see
the chapter "Removal and installation".

2. Check whether all the oil has been drained

from the cylinder.

3. Clean the cylinder before disassembly. Work

in very clean conditions. Make sure that the
piston rod is not damaged during the repair
or maintenance activities.

4. Remove the circlips (1) and push the

bearing (2) from the eye.

5. Remove the circlip (4).

9 6. Remove the dirt which has collected before

the O-ring (5) and remove the O-ring (5).

7. Use a plastic mallet to carefully tap the

piston-rod guide (10) deeper into the
cylinder, until the spring clip (6) can be
removed. Make sure that the piston rod is not
damaged in the process.

8. Remove the spring clip (6) from the cylinder.

9. Pull the entire length of the piston rod (11)

out of the cylinder. The piston-rod guide (10)
will come out of the cylinder together with the
piston rod.

10. Remove the plastic rings (14) and (16) from

the piston.

11. Remove the nut (1) and use a plastic mallet

to tap the piston (13) from the piston rod.

12. Slide the piston-rod guide (10), the O-ring (5)

and the circlip (4) from the piston rod. Pay
attention to the position of the circlip.

13. Remove the dirt scraper (3), the sealing

ring (7), the O-ring (9) and the plastic ring (8)
from the piston-rod guide.

14. Remove the sealing ring (15) and the

underlying O-ring (16) from the piston.

Assembling the cylinder

1. Check the sealing-ring chambers and
recesses, the dirt scraper and O-rings for
impurities.
Check the surfaces of the piston rod and the
cylinder casing for signs of wear and/or
damage. Even the slightest damage can
cause a leak.
Check the condition of the spring clip (6) and
the circlip (4). Replace if necessary.
Replace the sealing rings, dirt scraper and
O-rings.
Apply a layer of grease to the O-rings and
running surfaces of the sealing rings and dirt
scraper prior to assembly.

2. Install the O-ring (16) on the piston (13).

a b
3. Heat the new sealing ring (15) for 5 minutes
in water at a temperature of 90C.

4. Position the special tool (DAF no. 1310472),

see "b" in the illustration, on the piston (13).

5. Slide the heated sealing ring (15) onto the

piston using the special tool
(DAF no. 1310473), see "a" in the
illustration. 15 16 13

9
A8 00 260

6. Slide the special tool (DAF no. 1310474),

see "c" in the illustration, over sealing ring c
(15) and leave the special tool on the sealing
ring for 5 minutes.

13
16
15
A8 00 261

7. Install the sealing ring (7) with the recess

aimed towards the piston (13) into the piston-
rod guide (10). To do so, press the sealing
ring together as shown in the illustration.
Make sure that no sharp corners are formed.
Subsequently, press the sealing ring into the
chamber of the piston-rod guide as shown in
the illustration.
A8 00 262
8. Install the dirt scraper (3) into the piston-rod
guide (10).
You should proceed in the same manner as
when installing the sealing ring (7).

9. Install the plastic ring (8) onto the piston-rod

guide (10).
You should proceed in the same manner as
when installing the sealing ring (15) on the
piston. A8 00 263

10. Install the O-ring (9) on the piston-rod guide

(10). The O-ring should fall into the groove at
the piston side. The plastic ring (8) is
positioned on the circlip side.

11. Slide the circlip (4) into the correct clamping

position over the piston rod.

12. Slide the O-ring (5) over the piston rod.

13. Oil the piston rod (11) and slide the piston-
rod guide (10) onto the piston rod.

14. Install the piston (13) on the piston rod,

replace the self-locking nut (18) and tighten B
the nut to the prescribed tightening torque,
9 see "Technical data".

15. Apply some oil to the cylinder casing.

16. Install the plastic rings (14) and (17) on the

piston. The gap openings of the rings should
be opposite each other. During the
installation of the piston in the cylinder, the
gap openings may not be positioned near
line connection A of the cylinder.
13 14 15 16 17 18 2 1
17. Apply some oil to the plastic rings (14) and
(17) and the sealing ring (15) and slide the A8 00 286
piston into the cylinder. When sliding the
piston into the cylinder, the plastic rings
should be pressed into the grooves.

18. Slide the piston-rod guide (10) into the

cylinder and tap the piston-rod guide
carefully into the cylinder using a plastic
mallet until the spring clip (6) can be fitted.
Make sure that the piston rod is not damaged
in the process.

19. Fit the spring clip (6) into the cylinder. Make
sure that the entire circlip is positioned
correctly in the groove.

20. Pull back the piston-rod guide (10) using the

piston rod, until the piston-rod guide is in A
contact with the spring clip (6).

21. Install the O-ring (5).

22. Install the circlip (4). Make sure that the

entire circlip is positioned correctly in the
groove.

23. Install one of the circlips (1) and press a new

bearing (2) into the eye.

24. Install the second circlip (1). 3 4 5 6 7 8 9 10 11 12

A8 00 285
25. Check the cylinder for internal and external
leakage, see chapter "Inspection and
adjusting".

6. DRAINING AND FILLING

6.1 FILLING THE HYDRAULIC LIFTING GEAR

1. Make sure that the trailing axle wheels are

fully lowered and on the ground.

2. Fill the reservoir with the specified oil up to

the "max." level mark.

3. Lift the trailing axle and top up oil to the

"min." level mark, if necessary.

4. Lower the trailing axle and, once again,

check the level. Top up oil to the "max." level
mark, if necessary.

CONTENTS
10 09N044 leading rear axle (FTP vehicle)

Page Date

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424

1.1 Description of 09N044 leading rear axle . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200424
1.2 Overview drawing, 09N044 leading rear axle . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200424

2. INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200424

2.1 Inspection and adjustment, wheel bearing play, 09N044 leading rear axle 2-1 . . . . . 200424
2.2 Checking the hub and wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200424

3. REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424

3.1 Removal and installation, wheel hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200424
3.2 Removal and installation, hub seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200424
3.3 Removal and installation, wheel bearings . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 . . . . . 200424

1. GENERAL
1.1 DESCRIPTION OF 09N044 LEADING REAR AXLE

The 09N044 leading rear axle is a rigid axle. The

axle is equipped with air suspension and if the
vehicle load admits it, the axle can be raised
pneumatically.
The wheel hub has separate wheel bearings that
are greased. The wheel bearing play is adjusted
using the hub nut, which is secured by a split pin.

1.2 OVERVIEW DRAWING, 09N044 LEADING REAR AXLE

10
9
8

5 6
4
1 2 3
S7 00 640

1. Hub cap
2. Split pin
3. Hub nut
4. Bearing cage
5. Outer race
6. Wheel hub
7. Brake drum
8. Outer race
9. Bearing cage
10. Hub oil seal

2. INSPECTION AND ADJUSTMENT

2.1 INSPECTION AND ADJUSTMENT, WHEEL BEARING PLAY, 09N044
LEADING REAR AXLE

Checking the wheel bearing play

1. Remove the hub cap using special tool
(DAF no. 1329498).

2. Lift the leading rear axle and support it

properly.

3. Release the brakes.

4. Fit a dial gauge; let the stylus rest against the

axle journal.

5. Push and pull on the wheel. Read the value

off the gauge. Compare this reading to the
specified value. See "Technical data". If the
reading falls outside the tolerance range, the
wheel bearing play should be re-adjusted.
S7 00 635
6. Fit the hub cap. Tighten the hub cap to the
specified torque using the special tool
(DAF no. 1329498), see "Technical data"'.

7. Adjust the brakes.

Adjusting the wheel bearing play

1. Remove the hub cap (4) using special tool
(DAF no. 1329498).

2. Lift the leading rear axle.

3. Release the brakes.

4. Remove the split pin (3) from the hub nut (2).
10
5. Tighten the hub nut to the specified
tightening torque, see "Technical data". Turn
the wheel at least 5 revolutions in anti-
clockwise direction and then 5 revolutions in
clockwise direction when fixing the hub nut.

6. Check that the wheel rotates smoothly. 1 2 3 4

7. Turn back the hub nut until the split pin can
S7 00 657
be fitted. Fit a new split pin.

Note:
There are 2 split pin holes in the axle journal.
Select the split pin hole where the hub nut needs
to be turned back the smallest distance.

8. Check the wheel bearing play. Check the

bearings for wear if the wheel bearing play
remains too large after adjustment.

9. Fit the hub cap. Tighten the hub cap to the

specified torque using the special tool
(DAF no. 1329498), see "Technical data"'.

10. Adjust the brakes.

2.2 CHECKING THE HUB AND WHEEL BEARINGS

1. Inspect the bearings for damage at the

2. If the outer race of the bearing is loose in the

hub or has turned in the hub, the hub should
be replaced.

3. Check the axle journal screw thread, the

bearing surfaces of the inner bearing races
and the running surface of the seal for
damage.

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, WHEEL HUB

Removing the wheel hub

1. Remove the hub cap (5) using special tool
(DAF no. 1329498).

2. Lift the leading rear axle and support it

properly.

3. Remove the split pin (4) and the hub nut (3).

4. Remove the outer wheel bearing (2).

5. Remove the hub (1) with the wheel.

Installing the wheel hub

1. Remove the grease from the hub (1).

2. Clean the bearings and liberally re-grease

the outer bearing races and bearing cages.
1 2 3 4 5
3. Lubricate the space between the wheel A8 00 430

bearings with new grease.

4. Install the hub with the wheel.

5. Fit the outer wheel bearing (2).

6. Fit the hub nut (5).

7. Adjust the wheel bearing play, see chapter

"Inspection and adjustment".

8. Fit a new split pin (4).

9. Lower the leading rear axle.

10. Fit the hub cap (5) using special tool 10

(DAF no. 1329894). Tighten the hub cap to
the specified torque, see "Technical data".

11. Adjust the brakes.

3.2 REMOVAL AND INSTALLATION, HUB SEAL

Removing the hub seal

1. Remove the wheel hub from the axle journal.

2. Drill two small holes into the seal and screw

the special tool (B) (DAF no. 0484899) into
the seal. Pull the oil seal from the wheel hub
using the special tool (A)
(DAF no. 0694928).

Installing the hub seal

1. Check the seal chamber for damage. A
2. Use the special tool (DAF no. 1329497) to
install the seal. Press the seal into the hub. B
3. Apply a little grease to the lips of the seal.

4. Install the wheel hub on the axle journal.

A8 00 432

3.3 REMOVAL AND INSTALLATION, WHEEL BEARINGS

Removing wheel bearings

1. Remove the hub (3) from the axle.

2. Remove the hub seal (6).

3. Remove the bearing cages (1) and (5).

4. If the wheel bearings should be replaced, the

6
outer bearing races (2) and (4) can be 5
tapped from the hub (3) using a copper 4
driving tool.

Installing wheel bearings

1. Clean the bearings and check them for signs
of damage. 2 3
1
2. Use a driving tool and a hydraulic press to A8 00 431

install the new outer bearing races (2) and

(4) into the hub (3). Check that the outer
races (2) and (4) are pressed into the hub (3)
as far as the stop.

3. Apply an ample quantity of new grease to the

outer races (2) and (4) and the bearing cages
(1) and (5).

4. Lubricate the space between the wheel

bearings with new grease.

5. Fit a new hub seal (6).

6. Install the hub (3).

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