Iveco EuroCargo (12 to 26 t). Manual — part 77
72459
Figure 91
QUICK GEARS (6
th
— 7
th
— 8
th
— 9
th
) ENGAGEMENT
By going with lever into second “H”, cam (A) moves downwards and pushes pin (B) leftwards.
The pin abuts on piston (C) valve and, by lifting it, closes the supply to union 22 discharging air contained into the cylinder through
vent hole (D).
Air will then go out of union 21 pushing the piston in reverse and allowing to insert quick gears.
6.5
÷ 6.9 bar
E
URO
C
ARGO
T
ECTOR
12-26 t
154
GEARBOX 2895.9
Base - February 2003
71917
71916
Figure 92
Figure 93
Figure 94
Figure 95
Make three reference marks (1) on sliding sleeve-crown
assembly (2) next to the three central seats, on fixed hub, for
positioning rollers.
Manually lift complete crown (2) and remove it, recovering
rollers, pins and springs.
71914
Abut epicyclic reduction gear assembly on a bench, unscrew
nut (1) and remove flange (2). Unscrew screws (3) and
remove cylinder (4).
71913
Unscrew screw (2) and remove piston (1).
Lift case (2) in order to free outlet shaft (3) and rod (1) for
synchronising drive fork.
Remove rod with fork (1), withdraw phonic wheel (3) and
remove synchronising ring (2).
71918
Figure 96
Through suitable pliers, remove elastic ring (1).
Figure 97
71915
35514
71922
Figure 98
Figure 99
Figure 100
Figure 101
71920
71919
Through pliers 99381125 (3), remove elastic ring (2) and
withdraw synchroniser (1).
Through a punch (1) with a suitable diameter, push the elastic
peg inwards till it abuts.
Through a suitable beater, push away pin (3) and withdraw
gear (2) completed with shoulder rings (1) and shims.
Recover all rollers composing the bearing.
35515
Figure 102
Figure 103
71921
In order to remove sliding sleeve (1) from crown (2), use small
pins (3) with diameter 2
÷ 2.3 mm and a length of 10 mm.
Apply a strap (2), tighten it in order to compress pins (3): in
such a way, the internal check ring is detached; then, withdraw
sliding sleeve (1).
E
URO
C
ARGO
T
ECTOR
12-26 t
156
GEARBOX 2895.9
Base - February 2003
71926
Figure 104
Figure 105
Figure 106
Figure 107
71924
Extract sealing gasket (4) from cover (2), unscrew screws (1)
and disassemble cover (2) and support (3).
71923
Through a suitable wrench (1), unscrew screws (2) and
remove check washers (3).
Withdraw synchronising ring (1), reaction ring (2) and recover
the spacer ring below.
Check that ball bearing (2), when rotating along the two
directions, does not show roughness or noise when sliding.
In case of a replacement of the bearing itself, slightly heat
support (1) seat before disassembling it.
71925
Check that all parts composing the epicyclic reduction gear
assembly do not shown traces of excessive wear, seizures or
breakages.
Replace the affected parts.
Checks
!
Upon assembling, the following must always be
replaced: rings, sealing gaskets and springs for sliding
sleeves positioning rollers.
E
URO
C
ARGO
T
ECTOR
12-26 t
GEARBOX 2895.9
157
Base - February 2003
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