Iveco EuroCargo (12 to 26 t). Manual

71671

71672

71673

Figure 9

Figure 10

Figure 11

Unscrew screws (1) and remove cover (2).
Unscrew screws (3) and remove cover (4).

With a punch (1) with an adequate diameter, push inside the
elastic peg till it abuts.

Place extraction peg 99342143 (2) and percussion extractor
99340205 (3). Extract the reverse gear supporting pin and
remove the gear (1) with related shoulder washer and
cylindric roller bearing.

79432

Figure 12

Figure 13

Unscrew the two securing screws for clutch disengagement
lever support and remove it from the gearbox.
Unscrew screws (1), leaving a safety one (

→) to be removed

after having vertically placed the gearbox.

72866

Release the screws (2) and remove the cover (1).
Remove the spring (3) and extract the push rod (4).

Unscrew screws (2) and remove fork pin (1) from both gear-
box sides.

78164

Figure 14

URO

ARGO

ECTOR

12-26 t

GEARBOX 2855.6

Base - February 2003

71677

Figure 15

Figure 16

Assemble on primary shaft (7) motion outlet flange (2) and
lock it with nut (1). Tie with a rope (6) secondary shaft (5) to
primary shaft (7) and with the help of a lifting device extract
shafts from front half-case together with internal drive shaft
(3).

Assist the internal drive shaft when going out of its
seat by operating in the point shown (

→) with

suitable tools.

Keep the complete synchronizer (4) manually
assembled in order to prevent check springs and
rollers from falling.

71680

Figure 17

Remove cylindric roller bearing from motion inlet shaft (1) and
heat contact surface (2) of front half-case. With a plastic
hammer extract motion inlet shaft (1) completed with ball
bearing.

71681

Figure 18

Extract rolling race (2) of tapered roller bearing of secondary
shaft, from front half-case (3) with extractor 99348004 (1).
Remove the adjustment ring.

Unscrew screws (1) and remove cover (2) on motion inlet
shaft.

72867

71676

Figure 19

Extract rear half-case (3) with rear axle 99341003 (1)
equipped with the pair of brackets 99341017 (2).

URO

ARGO

ECTOR

12-26 t

GEARBOX 2855.6

Base - February 2003

72868

71682

71684

Figure 20

Figure 21

Figure 22

With a suitable beater, extract from rear half-case the external
race (2) of roller bearing and spacer (1). From inside the
half-case, towards the outside, extract ball bearing (3).

Extract sealing gasket (2) from motion inlet shaft cover (1).

Extract sealing gasket (1) from primary shaft cover (2).

Grooves on hubs and related sliding sleeves must not be
damaged. The sliding sleeve must freely slide on the hub.
Sliding sleeve positioning rollers must not be damaged or
worn. Engagement toothing of sliding sleeves must not be
damaged.
Forks must be healthy and must not show any sign of wear.

GEARBOX CASE

Check wear of synchronising rings and respective coupling
bodies: they must not show any sign of wear.

Gearbox case and related covers must not show cracks.
Contact surfaces between covers and gearbox case must not
be damaged or distorted.
Bearing seats must not be damaged or excessively worn.

SHAFTS - GEARS

Shaft seats for bearings and gear toothings must not be
damaged or worn.

HUBS - SLIDING SLEEVES - FORKS

BEARINGS

Roller bearings or roller cages must be in perfect conditions
and not show traces of wear or overheatings.
By keeping bearings manually pressed and making them
simultaneously rotate along two directions, no roughness or
noise when sliding must be detected.

Upon assembling, the following must always be
replaced: rings, sealing gasket and springs for sliding
sleeves positioning rollers.

SYNCHRONIZERS - COUPLING BODIES

Upon assembling, do not mutually exchange the
checked parts.

URO

ARGO

ECTOR

12-26 t

GEARBOX 2855.6

Base - February 2003

71685

Figure 23

Butter, with hermetic type ”B”, the coupling seat surface of
cover (2) with sealing gasket and with keyer 99374201 (1)
assemble the sealing gasket itself.

Butter with hermetic type ”B” the threaded part of all
screws that must be screwed in the through-holes.

Clean the joining surfaces of case and covers and
apply ”LOCTITE 510” putty, before assembling, on
one of the two components.

Upon assembling, make sure that the sealing gaskets
are already lubrified, or butter with oil or grease the
sealing lip of inlet and primary shafts gaskets.

Do not insert oil before 20 min and do not try the
gearbox before 1h and 30 min.

Assemble bearing cages into their respective seats
and oil with TUTELA ZC 90.

Figure 24

71687

71688

61957

Figure 25

Figure 26

Assemble comparator 99395604 (1) on base 99370466 (2),
pre-load it by 5 mm and zero it on an abutment plane.

Place calibrated ring 99396031 (2) into its seat, without
adjustment ring, of bevel roller bearing on front half-case; place
base 99370466 completed with comparator (1), previously
zeroed, as shown in Figure 25.

First method -

Take note of the value read on the
comparator (Example: 2.43 mm).

Second method - Take note of the value read on the

comparator and add it to calibrated ring
thickness.
[Example: 2.43 + 50.5 = 52.93 mm
(Dimension B)].

The bearings pre-load adjustment for the secondary shaft
can be carried out with two procedures.

FRONT HALF-CASE

THICKNESS (S)

72869

Butter, with hermetic type ”B”, the coupling seat surface of
cover (3) with sealing gasket and with keyer 99370349 (2) and
handle 99370006 (1) assemble the sealing gasket itself.

URO

ARGO

ECTOR

12-26 t

GEARBOX 2855.6

Base - February 2003

Bearings pre-load adjustment for secondary
shaft

Content .. 44 45 46 47 ..

Iveco EuroCargo (12 to 26 t). Manual - part 46