Iveco EuroCargo (12 to 26 t). Manual — part 43
E
URO
C
ARGO
T
ECTOR
12-26 t
GEARBOX 2855.6
9
Base - February 2003
Gearbox
2855.6
Page
DESCRIPTION
11
. . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS AND DATA
12
. . . . . . . . . . . . .
TIGHTENING TORQUES
15
. . . . . . . . . . . . . . . . .
TOOLS
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GEARBOX 2855.6
DISENGAGEMENT/RE-ENGAGEMENT
21
. . . .
-
Disengagement
21
. . . . . . . . . . . . . . . . . . . . . . . .
-
Re-engagement
21
. . . . . . . . . . . . . . . . . . . . . . . .
GEARBOX DISASSEMBLY
23
. . . . . . . . . . . . . . . . .
-
Checks
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GEARBOX ASSEMBLY
27
. . . . . . . . . . . . . . . . . . . .
-
Bearings pre-load adjustment for secondary shaft
27
PRIMARY SHAFT DISASSEMBLY
33
. . . . . . . . . . . .
PRIMARY SHAFT ASSEMBLY
35
. . . . . . . . . . . . . . .
MOTION INLET SHAFT DISASSEMBLY
38
. . . . . .
MOTION INLET SHAFT ASSEMBLY
38
. . . . . . . . .
-
Motion inlet shaft bearing adjustment
38
. . . . . . .
SECONDARY SHAFT DISASSEMBLY
39
. . . . . . . .
SECONDARY SHAFT ASSEMBLY
39
. . . . . . . . . . .
INTERNAL DRIVE SHAFT DISASSEMBLY
39
. . . . .
INTERNAL DRIVE SHAFY ASSEMBLY
39
. . . . . . . .
EXTERNAL DRIVE BOX DISASSEMBLY
40
. . . . . .
EXTERNAL DRIVE BOX ASSEMBLY
41
. . . . . . . . .
-
Idle-R.M. switch adjustment
43
. . . . . . . . . . . . . . .
Figure 1
The IVECO 2855.6 gearbox is of the mechanical type with 1
st
,
2
nd
gear engagement through a double-cone synchronising
ring and 3
rd
, 4
th
, 5
th
and 6
th
gear engagement with free-ring
synchronising rings. The reverse motion engagement is with
a quick-connection sliding sleeve.
The gearbox case is made of light alloy and is composed of a
front half-case and a rear half-case.
Three openings are obtained in the rear half-case for the
possible application of a power takeoff.
Motion transmission is realised through a series of gears,
always meshed and with helical teeth.
The gears are keyed or obtained on four shafts: motion entry,
primary, secondary and reverse motion shafts.
The gear obtained on the motion entry shaft and those keyed
on primary and reverse motion shafts idly rotate on cylindrical
roller cages.
Motion entry shaft and primary shaft are supported by ball
bearings in the gearbox case.
The secondary shaft is front and rear supported by
tapered-roller bearings that are axially adjustable through an
adjustment ring.
The gears engagement and selection control is mechanical.
IVECO 2855.6 GEARBOX ASSEMBLY
79431
E
URO
C
ARGO
T
ECTOR
12-26 t
GEARBOX 2855.6
11
Base - February 2003
DESCRIPTION
E
URO
C
ARGO
T
ECTOR
12-26 t
12
GEARBOX 2855.6
Base - February 2003
GEARBOX
2855.6
Type
Mechanical
Gears
6 forward gears and
reverse gear
Gears engagement control
Mechanical
Power takeoff
Upon request
Gears engagement:
1
st
⇒
2
nd
3
rd
⇒
6
th
Double-cone synchronizer
Free-ring synchronizer
Reverse gear
Quick-connection type
Gears anti-disengagement
Sliding sleeve holding through rollers and springs.
Gears
With helical teeth
Gear ratio
First
1 : 6.433
Second
1 : 3.643
Third
1 : 2.308
Fourth
1 : 1.484
Fifth
1 : 1.000
Sixth
1 : 0.783
Reverse gear
1 : 5.630
Oil type
Amount
TUTELA ZC 90
5 kg. (5.5 litres)
Fixed hubs assembly temperature
100
o
C to 130
o
C
E
URO
C
ARGO
T
ECTOR
12-26 t
GEARBOX 2855.6
13
Base - February 2003
With tapered rollers
Secondary shaft bearings
pre-loading adjustment
Through rings
Secondary shaft pre-loading
adjustment rings thickness
4.0 - 4.1 - 4.2 - 4.3 - 4.4 - 4.5 - 4.6 - 4.7 - 4.8 - 4.9 - 5.0 -
5.1 - 5.2 - 5.3
Supplied in a kit
Secondary shaft bearings
assembly temperature
85
o
C
Secondary shaft bearings
adjusting rings thicknesses
2.40 - 2.45 - 2.50 - 2.55 - 2.60 -
2.65 -2.70 - 2.75 - 2.80
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