Iveco Daily. Manual — part 217
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6 AS 300 VD TRANSMISSION
D
AILY
Revi - February 2005
- Refitting
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CHASSIS WIRING - GEARBOX
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- Removal
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- Refitting
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GEARBOX WIRING - GEARBOX
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- Removal
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- Refitting
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CALIBRATION
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The 6 AS 300 VD gearbox is of the electro-mechanic type,
with synchronized forward speed engagement.
This is the automatic version of mechanic transmission
6 AS 300.
It is made up of a light-alloy case (which also acts as the clutch
cover), a rear cover (where the speed engagement controls
and the gearing are housed), an actuator for speed selection
and engagement, a clutch control actuator, and an electronic
control unit.
There is an opening on the side of the transmission to apply
a power take-off.
Drive transmission is accomplished by a set of helical-toothed
constant mesh gears, for both forward and reverse gears.
The splined or machined gears are on four shafts: input, main,
transmission and reverse gear.
The input and main shafts are supported, in the transmission,
by watertight, non-adjustable ball bearings.
The transmission shaft is supported, in the transmission, by
roller bearings that can be adjusted axially by means of ring
shims.
Speed engagement synchronization is achieved by means of
single-cone, free-ring synchronizers (for 3rd, 4th, 5th and 6th
speeds) and double-cone, free-ring synchronizers (for 1st and
2nd speeds).
The reverse speed is not synchronized.
Control inside the transmission is accomplished with five rods:
a main rod to select and engage gears; four rods equipped with
forks for engaging gears.
V= VAN
D = Direct drive
1. Progressive production number - 2. 1st/6th speed ratio - 3. Amount of oil (in dry conditions) - 4. Oil standards -
5. Tachograph ratio - 6. IVECO number - 7. ZF serial number.
101934
Figure 131/1
6 AS 300 VD TRANSMISSION
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D
AILY
Figure 131/2
The combined action of the selector lever (2) and the engagement lever (1) cause the rotation and axial movement of the rod (4)
in two subsequent steps to engage the required gear by means of the rods (8-7-6 and 9).
The motion of speed selection/engagement levers occurs through the action of two electric motors (M) managed directly by the
gearbox electronic control unit.
Neutral arrangement and/or 3
rd
/4
th
gear
selection and engagement arrangement
3
rd
/4
th
gear selection
According to the angular position of the selector lever (2), the
slider (3) turns with the rod (4) (which is integral) and the
selector (5) arranges the slider on the 3
rd
/4
th
gear rod (9). At
the same time, the slider (3) moves the rod (10) to prevent
the simultaneous engagement of two gears, to keep the 3
rd
and 4
th
gear engagement rod (9) free and to prevent
movement of the other rods by engaging the grooves in the
rods.
3
rd
/4
th
gear engagement
According to the movement of the engagement lever (1), the
slider (3) axial moves the rod (4) (which is integral), the
selector (5) (previously arranged) and consequently the
chosen 3
rd
and 4
th
gear engagement rod (9).
Neutral position coincides with the 3
rd
/4
th
gear selection
arrangement.
In this case, the vertical axis of the selector lever (2) is exactly
at 90
° with respect to the horizontal axis of the control
corresponding to no angular variation of the rod (4).
This arrangement is obtained by moving the selector lever (2)
anticlockwise. In this way, the selector (4) is inserted in the
1
st
/2
nd
gear engagement rod (5).
By moving the lever (1), the slider (3) will axially move the
1
st
/2
nd
gear engagement rod (5).
Figure 131/3
1
st/
3
rd
gear selection election and engagement
arrangement
s
SECTION A-A
SECTION A-A
101935
101936
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6 AS 300 VD TRANSMISSION
D
AILY
Revi - February 2005
Figure 131/4
5
th
/6
th
gear
selection
and
engagement
arrangement
This arrangement is obtained by moving the selector lever (2)
clockwise. In this way, the selector (4) is inserted in the 5
th
/6
th
gear engagement rod (5).
By moving the lever (1), the slider (3) will axially move the
5
th
/6
th
gear engagement rod.
This arrangement is obtained by moving the selector lever (2)
anticlockwise. In this way, the selector (4) is inserted in the re-
verse gear engagement rod (5).
By moving the lever (1), the slider (3) will axially move the re-
verse gear engagement rod (5).
Safety device
The transmission is equipped with a device which prevents the
simultaneous engagement of two gears.
It consists of a suitably shaped rod (6) fitted transversally in the
transmission box.
The slider (3), moves the rod (6) under the action of the lever
(2). This keeps the selected gear engagement rod free and
prevents movement of the other gears by engaging their
respective grooves.
Figure 131/5
Reverse
gear
selection
and
engagement
arrangement
SECTION A-A
SECTION A-A
101937
101938
6 AS 300 VD TRANSMISSION
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D
AILY
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