Iveco Stralis AT/AD. Manual — part 138
2
REAR AXLES
S
TRALIS
AT/AD
Base - January 2003
NO
Insufficient lubrication.
Check there are no leaks from gaskets or the rear axle
casing and top up oil to correct level.
Inefficient wheel hub bearings.
Dismantle the hub and replace the required parts.
Incorrectly adjusted wheel hub bearings.
Adjust the bearings.
Drive shaft splines to fit the epicycloid gear unit gearing
worn.
Overhaul the assembly and replace worn or damaged
parts.
Lubricating oil level low.
Check there are no leaks from gaskets or the rear axle
casing and top up oil to correct level.
Drive shaft splines to fit the differential crown wheels
damaged.
Overhaul the rear axle and replace worn or damaged
parts.
The main rear axle operating faults are as follows:
1 - Wheel hub noise;
2 - Noise;
3 - Noise on release;
4 - Noise during acceleration;
5 - Cornering noise.
1
YES
NO
NO
NO
YES
YES
YES
YES
YES
WHEEL HUB NOISE
2
NOISE
(cont’d)
REAR AXLES
3
S
TRALIS
AT/AD
FAULT DIAGNOSIS
Incorrect fitting clearance between pinion and ring
bevel gear.
Remove the gear housing inspection cover and adjust
clearance between pinion and ring bevel gear.
Insufficient lubrication.
Check there are no leaks from gaskets or the housing
and top up to level.
Gear housing bearings badly set or deteriorated.
Overhaul the assembly.
Bad tooth contact between pinion and ring bevel gear.
Adjust the contact.
Inexact clearance between side pinion crown wheels.
Overhaul or replace the assembly.
3
YES
NO
NO
YES
YES
YES
YES
Incorrectly adjusted wheel hub bearings.
Adjust the clearance on the bearings.
Bad adjustment or wear on differential gears or
bearings.
Locate the trouble and overhaul the assembly.
NO
YES
YES
NOISE ON RELEASE
4
NOISE DURING ACCELERATION
5
CORNERING NOISE
4
REAR AXLES
S
TRALIS
AT/AD
Base - January 2003
Refitting
For refitting, carry out the operations described for
removal in reverse order, keeping to the required
tightening torques for the screws and/or nuts.
Afterwards, check that:
Figure 1
There follows a description of the operations for removing
and refitting the rear axle with disc brakes that, by analogy,
can be considered good for the rear axle with drum brakes
too.
- Set the vehicle on level ground and lock the front wheels.
- Loosen the nuts fixing the wheels.
- Lift the vehicle at the rear and put the chassis frame on
two stands.
- Put the hydraulic trolley 99321024 under the wheels,
take out the nuts fixing the wheels and remove them.
- Cut the clamps holding the wiring and air piping to the
reaction triangle.
- Disconnect the three brake air pipes (33) from the
bracket (30).
- Take out the screws (31) and disconnect the reaction
triangle (32) from the axle housing.
- Extract the speed sensors (1) from the brake calliper
supporting flange (2) (det. A).
- Take out the screws (12) and extract the brake lining
wear sensor (13) (det. B).
- Disconnect the air pipe (16) and the electrical connec-
tion (29) from the differential locking control device.
- Take out the screws (27) fixing the propeller shaft flange
(28).
- With an appropriate rope, secure the propeller shaft to
the vehicle’s chassis frame.
- Disconnect the brackets (5) for the levelling valve tie
rods (35) from the mounts (17).
- Using a hydraulic lift, apply the mount 99370617 (21) to
the axle housing.
- Take out the fixing screws (10) and disconnect the stabi-
lizer bar (8) from the mounts (9).
- Loosen the screws (7) fixing the cap (6) retaining the
stabilizer bar (8) to the anchor bar (4).
- Turn the stabilizer bar and secure it with a suitable rope
to the chassis frame so as not to obstruct removing the
rear axle.
- Take out the nuts (14) and disconnect the longitudinal
tie rods (15).
- Take out the nuts (11) and disconnect the shock ab-
sorbers (3) from the axle mount (17).
- Disconnect the air vent pipe (34) from the axle.
- Take out the nuts (26) and disconnect the air springs
(18) from the mounts (17).
- Lower the hydraulic lift and extract the rear axle from
the vehicle.
- Disconnect the mounts (17) from the axle housing, re-
moving the nuts (22) for the fixing brackets (23).
- Take out the screws (25) and disconnect the wiring and
air pipes of the differential case.
- Fully unscrew the screws (24) to release the brake cylin-
der (20).
- Remove the nuts (19) and disconnect the brake cylinder
(20) from the axle housing.
72796
Removal
- There is no air leakage from the air pipes.
- The lubricating oil of the axle housing is at the right level.
- The differential locking indicator lamp works properly; if
it does not, proceed as described under the relevant
heading.
REAR AXLES
5
S
TRALIS
AT/AD
REMOVING-REFITTING THE REAR AXLE
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст