Iveco Stralis AT/AD. Manual — part 160
39696
39572
39697
39698
39699
Figure 85
Figure 86
Figure 87
Figure 88
Figure 89
Using an electric heater, heat the support bearing (2) for 15’
at a temperature of 100ºC and fit on the gear housing cover
using a punch (1). Repeat the same operation on the other
bearing.
Fit a new oil baffle on the pinion support (1) Using punch
99374093 (2), fit the intermediate bearing external ring and
the front bearing external ring in the support in their
respective seats.
Using a feeler gauge (1) measure and note the thickness of the
adjusting ring on disassembly (value A).
Secure tool 99395027 (6) in a vice and fit the following parts:
- the bearing (5) on the pinion-side;
- the previously measured adjusting ring (4) and the bearing
(3).
Fully tighten the ring nut (2).
Position part (1) of tool 99395027 (6) on the bearing (3),
fitted with a zero-set dial gauge on the end of the tool (6).
Then remove:
- the part (1),
- the ring nut (2),
- the bearing (3),
- the adjusting ring (4) on the tool (6).
Position the support (4) on the bearing (5, Figure 88) and the
bearing (3) on the support. Tighten the ring nut (2) by hand
and check the rolling torque, as indicated in Figure 90.
Procedure
to
follow
to
determine
the
thickness of the bevel pinion rolling torque
adjusting ring
Assembling the bevel pinion support
90
REAR AXLE 451391
S
TRALIS
AT/AD
Base - January 2003
Position the complete support on two parallel blocks; using
the torque wrench (1) applied on tool 99395027 and read the
rolling torque. This value should be 1.5 to 3.5 Nm; if not, adjust
by means of the ring nut (2, Figure 87).
Position the part (1, Figure 79), with the dial gauge zero-set,
on the bearing (3) and read the eventual deviation (value B).
Thickness S on the adjusting ring is provided by the following
formula:
Where:
A = thickness of the adjusting ring assembled for dial gauge
zero-setting;
B = deviation value read;
C = 0.05 mm coefficient which takes into account the
expansion of the bearings as a result of the assembly
negative allowance on the bevel pinion.
39700
39701
39702
Figure 90
Figure 91
Fit the adjusting ring (2), in order to position the pinion in
relation to the bevel gear, on the bevel pinion (1). The
thickness of the adjusting ring is determined by the reference
value (3) marked on the bevel pinion.
See the table in Figure 92.
Summary table to determine the thickness of the bevel pinion
position adjusting ring.
Heat with an electric drier to 100ºC and insert the rear straight
rollers bearing internal ring (1) on the bevel pinion (2).
First example:
A = 10.12 mm
B = + 0.13 mm
C = 0.05 mm
S = 10.12 - (+ 0.13) + 0.05 =
S = 10.12 - 0.13 + 0.05 = 10.04 mm.
Second example:
A = 10.12 mm
B = - 0.13 mm
C = 0.05 mm
S = 10.12 - (- 0.13) + 0.05 =
S = 10.12 + 0.13 + 0.05 = 10.35 mm.
On completion of the operation, remove the parts of tool
99395027.
11 + 0,5
Figure 92
Figure 93
REAR AXLE 451391
91
S
TRALIS
AT/AD
Value marked on the
bevel pinion
Total thickness of
adjusting ring
0
4.6
0.1
4.5
0.2
4.4
0.3
4.3
0.4
4.2
0.5
4.1
0.6
4.0
0.7
3.9
0.8
3.8
0.9
3.7
1.0
3.6
39703
39705
39704
39706
39707
39708
Figure 94
Heat the intermediate bearing (1) for approx. 15’ at a
temperature of 100ºC and fit on the bevel pinion (2); fit the
adjusting ring (3) with the same thickness as previously noted
(page 29-30).
Fit the previously assembled support (1) on the bevel pinion
(2), fitting the front bearing. Using key 99374013 (3) and grip
99370006, insert the oil seal ring (4).
Assemble the drive coupling flange (1) with a punch and
tighten the fixing nut by hand.
Using a punch, fit the rear straight rollers bearing (1) in position
on the differential housing.
Provisionally assemble the bevel pinion support (2) on the
differential housing (3), insert 2 screws (4) and washers in
diametrically opposing positions. Using a torque wrench (1),
tighten to a torque of 160
± 10 Nm (16 ± 1 kgm).
Block the drive coupling flange rotation using reaction lever
99370317 (1) and, using Allen wrench 99355081 (2), the
multiplier (3) and a torque wrench (4) tighten the fixing nut
to a torque value of 700
± 50 Nm (70 ± 5 kgm).
Figure 95
Figure 96
Figure 97
Figure 98
Figure 99
92
REAR AXLE 451391
S
TRALIS
AT/AD
Base - January 2003
Using torque wrench 99389819 (1) and the appropriate Allen
wrench, check that the total rolling torque value corresponds
with the value indicated in Figure 103.
39671
39709
39712
39711
Figure 100
Using hook 99370509 (1), position the gear housing (2)
together with the roller bearings on the differential housing.
Correctly fit the cover (3) making the marks (made during
disassembly operations) coincide.Provisionally tighten the
screws (2) and check that the adjusting ring nuts (4) screw-in
easily.
Remove the screws (2), smear the threads with LOCTITE
AVX and then re-tighten with a torque wrench (1) to a torque
of 280 ± 15 Nm.
The rolling torque reading is carried out when there is a
clearance between the teeth on the bevel gear pair.However,
the total rolling torque value varies according to the reduction
bevel gear pair ratio (see table in Figure 103).
Gear
housing
bearings
rolling
torque
adjustment
If the torque value is different from that indicated in Figure 104,
adjust the adjustment ring nuts (2) with wrench 99354001 (1)
until the required torque is obtained.
1
2
Figure 101
Figure 102
Figure 103
Figure 104
REAR AXLE 451391
93
S
TRALIS
AT/AD
No.of teeth
Ratio
Total rolling torque (Nm)
17/35
2.059
a + (1.5 - 2.4)
19/33
1.737
a + (1.6 - 2.6)
21/34
1.619
a + (1.9 - 3.1)
23/36
1.565
a + (1.9 - 3.2)
24/35
1.458
a + (2.1 - 3.4)
28/37
1.321
a + (2.3 - 3.8)
27/32
1.185
a + (2.5 - 4.2)
21/40
1.905
a + (1.6 - 2.6)
27/37
1.370
a + (2.2 - 3.6)
29/37
1.276
a + (2.4 - 3.9)
a = 7. 5 B 9.5 Nm
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