Iveco EuroCargo (12 to 26 t). Manual — part 67
72458
Figure 95
SLOW GEAR ENGAGEMENT (1
st
— 2
nd
— 3
rd
— 4
th
— 5
th
AND REVERSE GEAR)
Operating diagrams about pneumatic epicyclic reduction gear drive circuit
Air coming from services tank, passing through a reduction gear, is reduced to the pressure of 6.5
÷ 6.9 bars and reaches consent
valve at union I.
By pressing the clutch, operate on the gearbox lever to engage a gear (1-2-3-4-5-RG); cam (A) is moved upwards and pushes pin
(B) leftwards.
The pin abuts on piston (C) valve and by lifting it, closes the supply to union 21.
By discharging air contained into the cylinder through the vent hole (D), air will then go out of union 22 thereby keeping gearbox
piston in slow gears.
E
URO
C
ARGO
T
ECTOR
12-26 t
GEARBOX 2870.9
113
Base - February 2003
EPICYCLIC REDUCTION GEAR ASSEMBLY
Figure 96
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.
72459
E
URO
C
ARGO
T
ECTOR
12-26 t
114
GEARBOX 2870.9
Base - February 2003
71917
71916
Figure 97
Figure 98
Figure 99
Figure 100
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 101
Through suitable pliers, remove elastic ring (1).
Figure 102
71915
E
URO
C
ARGO
T
ECTOR
12-26 t
GEARBOX 2870.9
115
Base - February 2003
35514
71922
Figure 103
Figure 104
Figure 105
Figure 106
71920
Withdraw synchroniser fixed hub (1).
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 107
Figure 108
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
116
GEARBOX 2870.9
Base - February 2003
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