Iveco EuroCargo (12 to 26 t). Manual — part 79
ALLISON GEARBOX MD 3060P
163
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ARGO
T
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12-26 t
5302
Allison gearbox
MD 3060P
Page
DESCRIPTION
165
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHARACTERISTICS AND DATA
168
. . . . . . . . . . . . . .
MAIN OPERATION ANOMALIES
169
. . . . . . . . . . . . .
TIGHTENING TORQUES
177
. . . . . . . . . . . . . . . . . . . .
TOOLS
177
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISCONNECTING AND CONNECTING
GEARBOX CONTROL MODULE AGAIN
179
. . .
- Disconnecting
179
. . . . . . . . . . . . . . . . . . . . . . . . . .
- Refitting
179
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING SPEED SENSORS
179
. . . . . . . . . . . . . . . .
- Replacing turbine speed sensor
179
. . . . . . . . . . . .
- Engine revolutions sensor replacement
180
. . . . . .
- Replacing the output speed sensor
180
. . . . . . . . .
REPLACING OIL LEVEL SENSOR
180
. . . . . . . . . . . . .
REPLACING OIL SUCTION FILTER
181
. . . . . . . . . . . .
REPLACING THE SOLENOID VALVES
181
. . . . . . . . .
REPLACING PLANE GASKETS IN GEARBOX
CONTROL MODULE
182
. . . . . . . . . . . . . . . . . . .
REPLACING PRESSURE SWITCH F3
183
. . . . . . . . . . .
REPLACING THE SEAL RING ON THE OUTPUT
SHAFT
183
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1
DESCRIPTION
The Allison MD 3060 P gearbox is automatic and it provides
six forward speeds and one reverse speed by means of a
hydrodynamic torque converter, two clutches, three brakes
and tree crown wheels.
For all types of gearbox, 5th and 6th gears are overgeared up.
The reverse gear has a ratio that is greater than the first gear
that allows a better speed control on slopes.
61402
ALLISON AUTOMATIC GEARBOX
ALLISON GEARBOX MD 3060P
165
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12-26 t
The torsional forces emitted by the engine are absorbed due
to the clutch/damper lockup so that they are not transmitted
to gears and the remaining parts of the transmission. The wide
lockup operation reduces fuel consumption and improves
braking efficiency.
Both gearboxes are equipped with the power takeoff gear. (5
- Figure 2).
The power takeoff can be installed on the left or on the right
side of the converter box (8 - Figure 3; 3 - Figure 4).
Figure 2
52001
Clutches are pressure-balanced on both piston sides to pro-
long the clutch life and for a more accurate control on the
whole range of gearbox gears.
Planetary gears always being engaged are of the helical teeth
type to allow a more silent gearbox operation.
The hydrodynamic torque converter, in addition to being
mandatory for vehicle start-up, allows a gearbox operation
without shakes reducing wear of members composing the ve-
hicle kinematic chain.
ALLISON MD 3060 P AUTOMATIC GEARBOX
1. Exclusion clutch/torsional damper lockup - 2. Converter turbine - 3. Converter pump - 4. Converter box -
5. Power takeoff gear - 6. Front support - 7. Clutch box - 8. Clutch - 9. Main box - 10. Brake - 11. Front planetary gear -
12. Brake - 13. Central planetary gear - 14. Brake - 15. Rear planetary gear - 16. Rear cover - 17. Output shaft -
18. Main shaft - 19. Hydro-electric controls - 20. Clutch - 21. Oil pump - 22. Oil pump driving stub -
23. Front support sleeve - 24. Converter distributor - 25. Turbine shaft.
166
ALLISON GEARBOX MD 3060P
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12-26 t
Base - February 2003
MD 3060 P AUTOMATIC GEARBOX REAR RIGHT VIEW
1. Assembly pads - 2. Output speed sensor - 3. Exchanger arrangement - 4. Main pressure inlet - 5. Identifying plate -
6. Electric gearbox wiring connector - 7. Engine revolution sensor - 8. Power takeoff connection (available on both sides) -
9. Exhaust.
Figure 3
MD 3060 P AUTOMATIC GEARBOX FRONT LEFT VIEW
1. Start-up crown - 2. Front torque converter cover - 3. Power takeoff connection (available on both sides) -
4. Main power takeoff - 5. Oil filling pipe and level rod (available on both sides) - 6. Assembly pads -
7. Electric gearbox wiring connector - 8. Exhaust
Figure 4
52003
52004
ALLISON GEARBOX MD 3060P
167
E
URO
C
ARGO
T
ECTOR
12-26 t
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