Iveco EuroCargo (12 to 26 t). Manual - part 63

Grooves on hubs and related sliding sleeves must not be
damaged. The sliding sleeve must freely slide on its hub. Sliding
sleeve positioning rollers must not be damaged or worn.
Sliding sleeve engagement toothings must not be damaged.

Forks must be healthy and 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 2870.9

Base - February 2003

71686

Figure 25

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.

71687

71688

61957

Figure 26

Figure 27

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 the figure.

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)

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.

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.

To guarantee assembly oil seal, make sure that sealing
gaskets are already lubricated, or butter with oil or
grease the sealing lip of inlet and primary shafts
gaskets.

URO

ARGO

ECTOR

12-26 t

GEARBOX 2870.9

Base - February 2003

Bearings pre-load adjustment for secondary shaft

The adjustment ring thickness choice is always carried
out in excess. Example; thickness S = 4.27: thickness
S = 4.3 is taken. Measuring of dimension ”A”, carried
out with secondary shaft in vertical position, that, in
addition to facilitating the measure itself, allows having
an axial load on the rear bearing.

71901

Figure 28

Figure 29

After having computed the thickness value of the adjustment
ring, disassemble again secondary shaft (3, Figure 30) and oil
pump (1, Figure 29).

First method -

Take note of the value read on the
comparator (Example 1.84 mm). The
adjustment ring value is obtained by
summing

the

two

measured

values

(Example 2.43 + 1.84 = 4.27 mm)

Second method - Take note of the value read on the

comparator and subtract it from the
calibrated ring thickness
[Example: 50.5 - 1.84 = 48.66 mm
(Dimension A, Figure 31)].

The adjustment ring value is obtained with formula
S = B - A

Example: 52.93 - 48.66 = 4.27 mm.

71900

Assemble and simultaneously rotate, till it abuts, the secondary
shaft (3, Figure 30) completed with bearings in rear case. Place
calibrated rings 99396031 (2, Figure 30) on the case (4,
Figure 30). Arrange, as shown in the figure, base 99370466
completed with previously-zeroed comparator (1, Figure 30);
the comparator rod must abut on the external bearing ring.
Carry out the measure on two diametrically-opposite points
and perform the arithmetic mean.

71902

Figure 30

On intermediate case (1) assemble external race (2) for
secondary shaft bearing and ball bearing (3) for primary shaft.

Assemble oil pump (1) by screwing screws (2) at the required
torque; rotate the intermediate case.

35465

Figure 31

INTERMEDIATE CASE

URO

ARGO

ECTOR

12-26 t

GEARBOX 2870.9

Base - February 2003

Slightly heat the ball bearing seat, assemble motion inlet shaft
(1) completed with bearing (4), adjustment ring (3) and elastic
ring (2). Settle the bearing till it abuts.

32447

71692

71693

71679

Figure 32

Figure 33

Figure 34

Figure 35

Apply LOCTITE 510 sealant on contact surfaces (

→)

between front half-case and motion inlet shaft cover.

Centre external race (1) of bevel roller bearing of front cover
secondary shaft on extensible beater 99374092 (2) adjusted
with socket head screw (3). Lock beater with socket head
screw (4).

Slightly heat seat (4) of secondary shaft bearing race on front
half-case and assemble external race (3) by settling it till it
abuts with beater 99374092 (2), equipped with handle
99370007 (1).

Before assembling on front half-case the motion inlet
shaft, carry out bearing adjustment as described in the
related procedure on page 108.

Figure 36

71691

Place adjustment ring (1), whose thickness is equal to the
previously-obtained one, into the secondary shaft bearing seat
on the front half-case (2).

URO

ARGO

ECTOR

12-26 t

100

GEARBOX 2870.9

Base - February 2003

Content .. 61 62 63 64 ..