Iveco EuroCargo (12 to 26 t). Manual — part 108

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12-26 t

AXLES IN TANDEM MERITOR (REAR)

55

ù

SPECIFICATIONS AND DATA

Axle type:

PR 140 E (R 0868)

Bearing axle with simple reduction.

DIFFERENTIAL ASSEMBLY

Crown wheel and pinion assembly
reduction ratio (pinion/ring gear
teeth number)

1/5.86 (7/41)
1/5.29 (7/37)
1/4.63 (8/37)

Bevel pinion bearings

2 taper roller bearings and 1 straight roller bearing

Bevel pinion bearing rolling torque

new bearings

Nm

kgm

reused bearings

Nm

kgm

1.5 to 5.5

0.15 to 0.55

1.5 to 3.1

0.15 to 0.31

Bevel pinion bearing pre-load
adjustment

through shims

Thickness of bevel pinion bearing
pre-load adjusting rings

mm

5.19 - 5.22 - 5.30 - 5.32 - 5.52 - 5.55 - 5.45 - 5.60 -

8.10 - 8.20 - 8.22 - 8.30 - 8.38 - 8.48 - 8.58

Clearance between pinion
and ring gear

mm

0.20 to 0.46

Clearance adjustment between
pinion and ring gear

Through ring nuts

The axle is a bearing axle type with a simple reduction; it
consists of a box made in stamped steel sheet and properly
strengthened.
The differential consists of a reduction helical-toothed gear
pair (pinion — ring gear assembly) and a wheelwork box (side
pinion — crown wheel assembly).
The pinion is supported by two taper roller bearings and by
one straight roller bearing.
The adjustment of the bevel pinion assembly is made through
adjusting rings placed between the two taper roller bearings.

You can also adjust the bevel pinion position with reference
to the ring bevel gear by changing the thickness of the pack of
the rings, which are inserted between the differential box and
the bevel pinion support.
The wheelwork box is supported by two taper roller bearings
and can be adjusted axially through two threaded ring nuts.
The axle is provided with a pneumatic control differential
locking device.
The wheel hubs are supported by two taper roller bearings
floating on the tube, which can be adjusted by means of a
threaded nut.

DESCRIPTION

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12-26 t

56

AXLES IN TANDEM MERITOR (REAR)

Base - February 2003

mm

0.08 to 0.22

Differential box bearing
rolling torque

Nm
kgm

1.7 to 3.9

0.17 to 0.39

Cap opening out adjustment

Through ring nuts

Rolling torque between side
pinions and crown wheels

Nm
kgm

Max. 68

Max. 6.8

Bevel pinion positioning with
reference to differential box

Through adjusting shims

Thickness of adjusting rings
inserted between bevel pinion
support and differential box

0.125 - 0.200 - 0.500

WHEEL HUBS

Wheel hub bearings

Two taper roller bearings

Hub bearing axial clearance

0.00 to 0.05

Wheel hub bearing rolling torque

Nm
kgm

Max. 1.96
Max. 0.20

Wheel hub bearing axial clearance
adjustment

Through nut

Axle oil TUTELA W140/M-DA

Hendrickson suspension Litres (kg)

12.2 (11)

36395

SECTION OF DIFFERENTIAL PR 140 E (R 0868)

9

Figure 1

TIGHTENING TORQUES

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12-26 t

AXLES IN TANDEM MERITOR (REAR)

57

PART

TORQUE

Nm

(kgm)

1

Nut to secure parts on bevel pinion

1392.5

± 142

(139.2

±14.2)

2

Transmitter locking nut

40

± 5

(4

± 0.5)

3

Differential locking device

M6x1 (10.9)

cover securing screw

M6x1 (8.8)

14

± 2

11

±1

(1.4

± 0.2)

(1.1

± 0.1)

4

Half box securing screw

1

st

step: pre-tightening

60

± 5

(6

± 0.5)

4

2

nd

step: angle closing

85º

÷ 95º

5

Screw to secure bevel pinion
support to differential box

1

st

step: pre-tightening

60

± 5

(6

± 0.5)

5

2

nd

step: angle closing

55º

÷ 65º

6

Self-locking nut to secure ring bevel gear to half box

1

st

step: pre-tightening

100

± 5

(10

± 0.5)

6

2

nd

step: angle closing

115º

÷ 125º

7

Screws and nuts to secure differential to axle box

1

st

step: pre-tightening

100

± 5

(10

± 0.5)

7

2

nd

step: angle closing

80º

÷ 90º

8

Screw to secure caps to differential box

527.5

± 57.5

(52.75

±5.75)

9

Differential locking device drive shaft

57.5

± 7.5

(5.75

± 0.7)

Figure 2

SECTION ON THE REAR AXLE WHEEL HUB IN TANDEM PR 145 2/D

85492

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12-26 t

58

AXLES IN TANDEM MERITOR (REAR)

Base - February 2003

TORQUE

PART

Nm

(kgm)

1

Nut fixing the drum to the wheel hub

40

± 4

(4

± 0.4)

2

Ring nut locking wheel hub adjustment nut

392.3

± 20

(40

± 2)

3

Screw fixing drive shaft to wheel hub

232.4

± 24.5

(23.2

± 2.4)

4

Nut fixing wheels

600

+50

-20

60

+5

-2

5

Nut for screw securing brake mounting

289

(29)