Iveco Stralis AT/AD. Manual — part 79
52
GEARBOX ZF 16 S 151 D.D. - 181 D.D./O.D. - 221 D.D.
S
TRALIS
AT/AD
Base - January 2003
GEARBOX
Type
Mechanical
Torque at input
16 S 151 D.D. Nm
ZF 16 S 181 D.D. Nm
ZF 16 S 181 O.D. Nm
ZF 16 S 221 D.D. Nm
1600
1900
2200
2200
Speeds
16 forward speeds
2 reverse speeds
Control of the four main
speeds
ERG control *
Splitter control
Mechanical
Pneumatic
Pneumatic
Power take-off
On request
Gear engagement:
Forward speeds
Free ring synchronizer
Bk-type single cone 1
st
-2
nd
-3
rd
-4
th
-5
th
-6
th
speed
Reverse gear
Quick engagement
Gear anti-disengagement
Sliding sleeves held by
pawls and springs.
Gear wheels
Helical-toothed
* ERG = Epicyclic reduction gear unit
D.D. = Direct Drive
O.D. = Over Drive (Multiplied)
GEARBOX ZF 16 S 151 D.D. - 181 D.D./O.D. - 221 D.D.
53
S
TRALIS
AT/AD
SPECIFICATIONS AND DATA
GEARBOX
ZF 16 S 151 D.D.
ZF 16 S 181 D D
ZF 16 S 221 O.D.
ZF 16 S 181 O D
GEARBOX
ZF 16 S 181 D.D.
ZF 16 S 221 D.D.
ZF 16 S 181 O.D.
Gear ratio
First
L
S
{
1: 16.47
1: 13.79
1: 13.80
1: 11.55
Second
L
S
{
1: 11.32
1: 9.48
1: 9.59
1: 8.02
Third
L
S
{
1: 7.79
1: 6.52
1: 6.81
1: 5.70
Fourth
L
S
{
1: 5.48
1: 4.58
1: 4.58
1: 3.84
Fifth
L
S
{
1: 3.59
1: 3.01
1: 3.01
1: 2.52
Sixth
L
S
{
1: 2.47
1: 2.07
1: 2.09
1: 1.75
Seventh
L
S
{
1: 1.70
1: 1.42
1: 1.49
1: 1.24
Eighth
L
S
{
1: 1.20
1: 1.00
1: 1.00
1: 0.84
Reverse gear
L
S
{
1: 15.42
1: 12.91
1: 13.17
1: 11.03
(L = slow ratio; S = fast ratio)
Type of oil
Tutela Truck FE-Gear
Tutela ZC 90
Quantity
Tutela ZC 90
Dry change
ZF 16 S 151
kg
litres
Dry change
10
11
ZF 16 S 181/221
kg
litres
12
13
Transmission and main shaft bearings
tapered rollers
Drive output flange assembly temperature
Max. 70
°C
Transmission shaft gear assembly
temperature
160
÷ 180 °C
D.D. = Direct Drive
O.D. = Over Drive (Multiplied)
54
GEARBOX ZF 16 S 151 D.D. - 181 D.D./O.D. - 221 D.D.
S
TRALIS
AT/AD
Base - January 2003
GEARBOX
ZF 16 S 151/181/221
Main and transmission shaft bearing and fi-
xed hub assembly tempature
100
°
End float:
- ERG* planet wheel shaft bearing
- ERG* fixed hub split ring
- Transmission shaft bearing split ring
0
÷ 0.1 mm
End float of gear of drive input shaft, first,
second and third speed
minimum 0.2 mm
Fourth speed gear end float
minimum 0.05 mm
End float between planet wheel holder
and ERG* planet wheels
0.4
÷ 1.3 mm
End float of bearings of shafts: main and
transmission on drive input side
0.0
÷ 0.1 mm
Main shaft rear bearing split ring end float
0.0
÷ 0.05 mm
Wear limit check distance of synchronizer
rings:
- first/second speed
- third/fourth speed
- ERG *
1.5 mm at 50 Nm (5 kgm)
0.8 mm
1.2 mm
Reverse gear idler end float
0.4
÷ 1.5 mm
End float or pre-load of half rings of main
and drive input shafts
from - 0.05 to + 0.05
* ERG = Epicyclic reduction gear unit
GEARBOX ZF 16 S 151 D.D. - 181 D.D./O.D. - 221 D.D.
55
S
TRALIS
AT/AD
SPECIFICATIONS AND DATA
GEARBOX
ZF 16 S 151/181/221
Distance for the clearance adjustment of the sliding
blocks of the splitter control fork on the relevant
sliding sleeve
sliding sleeve
- 16 S 151 D.D.
- 16 S 181 D.D./O.D. - 221 D.D.
94.1 mm
107.9 mm
Clearance of the sliding blocks of the forks in the
seats of the sliding sleeves
0.6
÷ 1.2 mm
Assembly distance of twin-lipped seal on rear cover
12.5
+1.0
mm
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