Iveco Stralis AT/AD. Manual — part 66
2
GEARBOXES
S
TRALIS
AT/AD
Base - January 2003
GEARBOX ZF 9 S 109 D.D.
1
S
TRALIS
AT/AD
5302
Gearbox
ZF 9 S 109 D.D.
Page
GENERAL SPECIFICATIONS
3
- Description
3
SPECIFICATIONS AND DATA
5
DIAGNOSTICS
8
TIGHTENING TORQUE
11
EQUIPMENT
12
REMOVAL
15
- Removing the E.R.U.box
15
- Re-assembling the E.R.U.box
15
DISASSEMBLING THE E.R.U. BOX
16
DISASSEMBLING THE E.R.U.
16
CHECKS
18
ASSEMBLING THE E.R.U.
20
ASSEMBLING THE E.R.U.BOX
21
DISASSEMBLING THE GEARBOX
23
REMOVING THE INPUT SHAFT
26
REMOVING THE MAIN SHAFT
26
REMOVING THE TRANSMISSION SHAFT
29
REMOVING THE GEARCHANGE
CASE OF GEARBOX
29
OIL PUMP
31
CHECKS
32
ASSEMBLING THE GEARCHANGE CASE
32
ASSEMBLING THE TRANSMISSION SHAFT
34
ASSEMBLING THE INPUT SHAFT
37
ASSEMBLING THE GEARBOX
37
ADJUSTING THE TRANSMISSION
SHAFT BEARINGS
39
- Adjusting the main shaft bearings
40
2
GEARBOX ZF 9 S 109 D.D.
S
TRALIS
AT/AD
Base - January 2003
39464
Figure 1
LONGITUDINAL SECTION VIEW OF GEARBOX 9 S 109 D.D.
Gearbox ZF 9 S 109 D.D. is mechanical type with synchronized gear engagement, with the exclusion of pick up gear and reverse
gear, featuring front engagement.
It is made up of a a part featuring 4 forward gears with reverse gear, a pick up gear and a Epicyclic Reduction Gear Unit of planetary
gears type on the rear part.
The E.R.U.unit (Epicyclic Reduction Gear Unit) enables splitting the number of gears of the four speed gearbox, thus, nine forward
gears are available, pickup gear included, that can be engaged in sequence
The control is fitted with an air-operated ”servoshift” device to improve speed selection and engagement.
The servoshift is a device comprising a mechanical/pneumatic module and a double-acting cylinder.
The advantages of this device are:
- Faster speed selection and engagement with less effort.
- It cushions the vibrations of the control linkage, reducing noise.
- Less synchronizing device stress.
The device works mechanically if the pneumatic system breaks down.
GEARBOX ZF 9 S 109 D.D.
3
S
TRALIS
AT/AD
GENERAL SPECIFICATIONS
Description of gearbox 9 S 109 D.D.
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