Iveco Daily Euro 4. Manual — part 150
Figure 60
33104
Figure 61
33099
Choose an adjustment ring having the same thickness ob-
tained by using the formula shown in SENZA CODICE and
fit it into the rear axle casing after removing rear taper roller
bearing outer ring previously mounted.
Use beater 99374093 (1) to fit definitely the rear taper roller
bearing outer ring into rear axle casing (2).
Figure 62
Heat the rear bearing (1) to 100
°C for approx. 15’ into an
air-circulation furnace and then fit it down onto the bevel
pinion (2).
32481
Figure 63
Position the fixed spacer (2) and the adjustment ring (3),
previously used to obtain the specified rolling torque, on the
bevel pinion (1).
32482
Figure 64
Position the complete bevel pinion into the rear axle casing.
Heat the front bearing (1) to 100
°C for approx. 15’ into an
air-circulation furnace and then fit it down onto the bevel
pinion (2).
33111
If the value marked on the pinion is preceded by
positive sign (+), it shall be subtracted from the
value obtained by the sum divided by two of the
housings, whereas it shall be added if preceded by
negative sign (-).
NOTE
108
REAR AXLE 450517/2
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Figure 65
74730
Fit the seal ring (2) in the axle casing with tool 99374201 (1).
Figure 66
Fit the transmission connecting flange (1) and the bevel pinion
retaining nut (2).
33113
Figure 67
74731
Assemble the flange (3) and prevent rotation with tool
99370317 (1).
Using the torque wrench (2), tighten the bevel pinion flange
(3) retaining nut to the correct torque value.
Figure 68
32480
Using the torque wrench 99389819 (1), measure the rolling
torque of the bevel pinion.
If the value is incorrect disassemble the pinion (2, Figure 64),
and replace the adjuster ring (3, Figure 63) with a suitable ring.
Refit the pinion and repeat the rolling torque check.
Figure 69
33116
Fit gearing case supporting bearing outer rings (2) and then
position the gearing case (1), previously fitted, in the rear axle
casing.
Differential unit refitting
The rolling torque must be measured at an ambient
temperature of 25
°C, making the pinion turn at a
speed of 50 rpm after it has made 10 turns.
NOTE
REAR AXLE 450517/2
109
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Figure 70
Insert the spacer (2), adjuster ring (1), adjuster ring (4) and
then spacer (3).
33117
Figure 71
Refit caps (1) taking into account the marks made at removal.
Use dynamometric wrench 99389827 (2) to tighten the
fastening screws to the specified torque.
Set gearing case supporting bearings and check total rolling
torque.
33119
Figure 72
33107
Use dynamometric wrench 99389819 (1) to check total
rolling torque:
Figure 73
Position magnetic dial gauge 99395684 (1) and check the
clearance between the pinion and crown on four equidistant
teeth on the crown. The average of the measurements must
equal the required value. If a different clearance is found, remove
the caps (3) again and swap over the assembly position of the
adjustment rings (1 and 4, Figure 70).
If this is not sufficient, replace the adjustment rings with ones
of a different thickness, but the total thickness must still be the
same as that of the adjustment rings removed.
This is so as not to change the total rolling torque.
Apply a thin layer of Prussian blue on ring gear teeth by brush.
Turn the pinion and measure the impression of the contact of
the pinion toothing on the crown wheel toothing.
Here we illustrate the possible contacts with the corrections
to obtain precise coupling of the crown wheel and pinion.
33121
If the value is incorrect, replace the adjuster rings (1 and 4,
Figure 70) with rings of the correct thickness.
Ct = 2.5 + (
x 0.99)
Cp = bevel pinion bearing rolling torque
Cd = 2
÷ 2.8 Nm (0.2 ÷ 0.29 kgm)
Ct = Cp + (
x 0.99)
Cd
R
Ct = total rolling torque
R = Rear axle reduction ratio
Example:
Ct = 2.5 + 0.71
Ct = 3.21 Nm (0.33 kgm)
2,8
3,91
The rolling torque must be measured at an ambient
temperature of 25
°C, making the pinion turn at a
speed of 50 rpm after it has made 10 turns.
NOTE
110
REAR AXLE 450517/2
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44603
44605
44604
44606
44607
44608
Figure 74
Figure 75
Figure 76
Figure 77
Figure 78
Figure 79
Excessive contact in the
upper part or crest of the
tooth.
Move the pinion towards
the ring bevel gear and then
move the ring bevel gear
away from the pinion to ad-
just clearance.
Excessive contact on heel
of tooth.
Move the ring bevel gear to-
wards the pinion and then
move the pinion away from
the ring bevel gear to adjust
clearance.
A = Coupling depth
B = Crest
C = Side
D = Play
Correct contact.
Excessive contact on side
of tooth.
Move the pinion away from
the ring bevel gear and then
move the ring bevel gear to-
wards the pinion to adjust
clearance.
E = Greater base
F = Heel
G = Top land
H = Contact surface
I = Lateral surface
Excessive contact on the
top land of the tooth.
Move the ring bevel gear
away from the pinion them
move the pinion towards
the ring bevel gear to adjust
clearance.
REAR AXLE 450517/2
111
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