Iveco Stralis AT/AD. Manual — part 201
38948
50725
50724
50726
Figure 9
Figure 10
Figure 11
Figure 12
This component supplies the hydraulic pressure necessary to
keep the third axle wheels aligned on a straight.
Nitrogen pressure checking and recharging
Discharge the oil pressure from the circuit, working as
described on page 96, Figure 18.
Remove the protective lid (1).
Fit the adapter (4) to tool 99366918 (5). Fit tool (5) complete
with adapter (4) onto the accumulator (3).
Make sure that discharge valve (2) is closed.
Open the hydraulic accumulator nitrogen pressure checking
and recharge valve (3) by working on the knob (1) and read
the pressure on the pressure gauge.
Close the checking and recharge valve.
Discharge the nitrogen pressure from tool (5) by opening
valve (2).
If the reading on the pressure gauge is lower than 8.5 bar,
connect the tool to the nitrogen cylinder piping (3).
Make sure that the discharge valve (2) is closed, open the
checking and recharge valve by working on the knob (1).
Open the nitrogen cylinder and charge the hydraulic
accumulator (4) up to the required value of 8.5
±1.
Having charge the accumulator, close the nitrogen cylinder
and the checking and recharge valve.
Open the discharge valve (2) to release the nitrogen pressure
from the tool.
Finally, disconnect the tool, fit back the plug and the
protective lid.
bar
bar
60182
Figure 13
Controls the operation of the centring cylinder as a function
of front axle steering.
501471
OPERATOR CYLINDER
S
TRALIS
AT/AD
94
STEERING REAR ADDED AXLE 57080/D1 (N 8072)
Base - January 2003
501476
HYDRAULIC ACCUMULATOR
50728
50729
50730
Figure 14
Figure 15
Figure 16
First of all discharge the pressure and then the oil from the
third axle control circuit as described on page 96, Figure 18.
Empty out the oil from the front axle circuit by disconnecting
the delivery pipe to the power steering system.
Disconnect the pipes (
→) from the cylinder (3).
Disconnect the pipes from the ABS solenoid valve.
Remove the cotter pins (1 and 5) the nuts (2 and 4) and take
down the cylinder (3).
Adjust dimensions A and C on the cylinder.
Fit back the cylinder to the vehicle by reversing the order of
the disassembly operations described above.
Recharge and bleed the power steering circuit according to the
procedure described on page 99 (circuit 1), with the third axle
control circuit discharged and making sure that the
measurements given in the figure are respected; if they are not,
adjust them.
To change dimensions A and B you can work on the ground
part (1) after releasing the retaining screw.
Recharge and bleed the third axle hydraulic control system
as described on page 99 (circuit 2).
Assembly
Steer to nearly full lock in one direction. Lock the wheels in
this position.
Discharge the hydraulic pressure from the 3
rd
axle system as
described on page 96, Figure 18.
Discharge the oil from the power steering hydraulic system.
Disconnect the pipes (
→) from the cylinder (1). Introduce
oil into fitting B, on the cylinder, at a pressure of ca 10 bar,
and make sure that no oil comes out from fittings A and D.
Introduce oil into fitting D, on the cylinder, at a pressure of
ca 10 bar, and make sure that no oil comes out from fittings
E, C and B (4).
Having completed these checks, restore travelling conditions
and recharge and bleed the hydraulic system as described on
page 99.
!
To ensure flawless system operation, measurement
B must be absolutely complied with the vehicle in
straight travelling conditions.
Checking cylinder oil sealing on the vehicle
!
The letters appearing in the figure are stamped on
the cylinder.
A
=
12 to 15 mm
B
=
98 mm
C
=
82 to 89 mm
Disassembly
50731
Figure 17
Controls third axle steering as a function of vehicle travelling
conditions and front axle steering.
501475
CENTRING CYLINDER
STEERING REAR ADDED AXLE 57080/D1 (N 8072)
95
S
TRALIS
AT/AD
50732
50733
50730
Figure 18
Figure 19
Figure 20
Remove the plug (8).
Connect a pipe to fitting (6) as shown in Figure 22; discharge
the hydraulic pressure by working on fitting (7).
Disconnect the pipes (
→) from the cylinder (3) and empty
out the oil.
Remove the cotter pins (1 and 5) the nuts (2 and 4) and take
down the cylinder (3).
Adjust dimensions A and C on the cylinder.
Fit back the cylinder to the vehicle by reversing the order of
the disassembly operations described above.
Arrange the vehicle in straight travelling position and make
sure that the measurements given in the figure are respected;
if they are not, adjust them.
To change dimensions A and B you can work on the ground
part (1) after releasing the retaining screw.
Assembly
Arrange the vehicle in straight travelling conditions and lock
the 3
rd
axle wheels in this position.
Open plug V and make sure no oil comes out.
Remove the plug (1)
Connect a pipe to fitting (Z) as shown in Figure 22, discharge
the hydraulic pressure by means of fitting (2).
Disconnect the pipes (
→).
Introduce oil into fitting X, on the cylinder, at a pressure of
ca 10 bar, and make sure that no oil comes out from fittings
Y and W.
Having completed these checks, restore travelling conditions
and recharge and bleed the hydraulic system as described on
page 97.
!
To ensure flawless system operation, measurement
B must be absolutely complied with the vehicle in
straight travelling conditions.
Checking cylinder oil sealing on the vehicle
!
The letters appearing in the figure are stamped on
the cylinder.
Recharge and bleed the third axle hydraulic control system as
described on page 97.
Do the wheel geometry as described under the relevant
heading.
Disassembly
A
=
16 to 22 mm
B
=
186 mm
C
=
102 to 109 mm
S
TRALIS
AT/AD
96
STEERING REAR ADDED AXLE 57080/D1 (N 8072)
Base - January 2003
Figure 21
Refitting
Carry out the operations described for removal in
the reverse order to refit and comply with
prescribed tightening torques.
73044
Position the vehicle on an even surface.
Lift the vehicle from the rear and position two supporting
stands under the chassis.
Discharge air pressure and disconnect air spring feeding
piping (3).
Remove the nuts (4 and 8) and the air spring (6).
Remove the nuts (7) and the supporting sheet (5).
Remove the nuts (2) and the support (1).
!
The operations described below have been carried
out on a vehicle fitted with additional steering rear
axle, but also apply to vehicles with single and twin
wheel additional non-steering axle.
STEERING REAR ADDED AXLE 57080/D1 (N 8072)
97
S
TRALIS
AT/AD
ADDITIONAL AXLE PNEUMATIC LIFTING DEVICE REMOVAL AND REFITTING
Removal
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст