Iveco Stralis AT/AD. Manual — part 153
62
REAR AXLE 451391
S
TRALIS
AT/AD
Base - January 2003
71548
The rear axle is of the double reduction type; the first
reduction is provided by the bevel pinion/ring bevel gear,
whereas the second reduction is by means of an epicycloid
unit on the wheel hubs.
The differential housing (with ring bevel gear) is supported by
taper roller bearings, which can be adjusted by means of two
threaded ring nuts.
The bevel pinion is supported by two taper roller bearings and
a third straight roller bearing.
The bevel pinion can be adjusted by means of adjustment rings
located between the two taper roller bearings.
The axle is provided with a pneumatic device for differential
locking.
The axle shafts start from the differential and transmit drive to
the epicycloid reduction units.
The drum brake is of the Simplex type.
REAR AXLE 451391
Figure 1
REAR AXLE 451391
63
S
TRALIS
AT/AD
DESCRIPTION
64
REAR AXLE 451391
S
TRALIS
AT/AD
Base - January 2003
Type of axle:
451391/2D
Load-bearing,
double
reduction
with
pneumatically
controlled
differential locking
451391/2D
(R8284)
Bevel pinion bearings
2 taper rollers and 1 straight roller
Bevel gear reduction unit ratio
27/32 (1.185) - 29/37 (1.276) - 27/37 (1.370) - 28/37 (1.321) -
24/35 (1.458) - 23/36 (1.565) - 21/34 (1.619) - 19/33 (1.737) -
21/40 (1.905) - 17/35 (2.059)
Epicycloid reduction unit/wheels
ratio
3.2
Bevel pinion bearing rolling torque
without seal
Nm
1.5
÷ 3.5
Bevel pinion bearing rolling torque
adjustment
with adjustment rings
Thickness of bevel pinion bearing
rolling torque adjustment rings
mm
10 - 10.02 - 10.04 - 10.06 - 10.08 - 10.10 - 10.12 - 10.14 -
10.16 - 10.18 - 10.20 - 10.22 - 10.24 - 10.26 - 10.28 - 10.30 -
10.32 - 10.34 - 10.36 - 10.38 - 10.40 - 10.42 - 10.44 - 10.46 -
10.48 - 10.50
Thickness of bevel pinion/ring bevel
gear position adjustment rings
mm
3.3 - 3.4 - 3.5 - 3.6 - 3.7 - 3.8 - 3.9 - 4.0 - 4.1 - 4.2 - 4.3 - 4.4 -
4.5 - 4.6 - 4.7
Clearance between pinion and ring
bevel gear
mm
0.20
÷ 0.33
Adjustment of clearance between
pinion and ring bevel gear
with ring nuts
WHEEL HUBS
Wheel hub bearings
2 taper rollers
Wheel hub bearings rolling torque:
new
bearings
with
surface
protection
Nm
6
÷ 7 + (12 ÷ 16)
Wheel hub bearings rolling torque:
run in bearings and new, lubricated
seals
Nm
6
÷ 7 + (5 ÷ 7)
Wheel hub bearings rolling torque:
run in bearings and seals
Nm
6
÷ 7 Nm + (2.5 ÷ 4.5 Nm)
Drive shaft end float
mm
0.5
÷ 1
Axle oil
TUTELA W140/MDA
16
14.5
G.R.W. maximum load
kg
13.000
39383
Figure 2
z
z
1
2
3
4
5
6
7
8
9
10
11
REAR AXLE 451391
65
S
TRALIS
AT/AD
TIGHTENING TORQUES
PART
TORQUE
PART
Nm
kgm
1
Nut fixing bevel pinion
700
± 50
70
± 5
2
Screw fixing bevel pinion support to differential housing
165
± 15
16.5
± 1.5
3
Screw fixing differential housing to axle housing
160
± 10
16
± 1
4
Screw fixing differential housing to axle housing
♦
160
± 10
16
± 1
5
Screw fixing bevel pinion support to differential housing
•
280
± 15
28
± 1.5
6
Screw fixing ring bevel gear to gear housing
300
± 10
30
± 1
7
Screw fixing safety plate to gear housing cover
60
± 6
6
± 0.6
8
Pressure switch
61
± 6
6.1
± 0.6
9
Cheese headed screw fixing control cylinder
25
± 2
2.5
± 0.2
10
Oil filler cap
-
-
11
Self-locking screw
120
± 10
12
± 1
D apply LOCTITE AVX
♦ apply LOCTITE 573
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