Page 317 of 891

33
REAR A XLES ELEMENTS
33 - 3
Rear axle
Adjust the hand brake cable.
Adjust the clearance at the limiter-operating rod (see chapter 37- Brake limiter adjust-
ment).
R EMOU NT I NG
Before remounting, lubricate with grease the a ttachment screws of the rear axle shock ab-
sorber bottom and the chassis, consequently , the connecting screws rear axle-chassis.
Line up the arms bearings right to the chassis supports, mounting the nuts with the screws
assembling the axle to the chassis, without tightening them to the moment,
Remount the springs.
Compress the axle so that rear springs are backed on the tray and mount the shock absorber
lower attachment screws.
Tighten to the prescribed moment the connecting screws.
Perform the dismounting operations in the reverse order.
Check the maximum allowed axial clearance of the bearing using a dial gauge and the support
R O541A.
REMARK :
The maximum allowed axle clearance of the bearing is 0.05mm.
Mount the rear wheels, lower the vehicle on the ground.
Tighten to the required moment, the rear wheels attachment screws.
Refill with fluid the brake circuit.
Purge the braking system.
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33
REAR A XLES ELEMENTS
33 - 5
Shock absorber
TIGHTENING MOMENTS (d aNm)
Shock absorber lower attachmen t nut 7.5
Shock absorber upper attachment nut 1.35
R EMARK :
The shock absorbers are stored in
horizontal position. In these conditions, it is
possi bl e t ha t shoc k a bsorb e rs worki ng
vertically, to get depressed. Therefore, be fore mounting on the vehicle,
it is necessary to perform the shock absorbers
pressing, by alternatively shifting the shock
absorber rod (upwards and downwards), the
shock absorber being in vertical position.
1. Upper attachment nuts
2. Protector
3. Upper buffer
4. Lower attachment screw.
DISMOUNTIN G
Remove the shock absorber protector (2);
Dismount the upper attachment screws (1) (through the trunk);
Loosen the rear wheels screws.
Lift the vehicle by means with a two-column elevator.
Dismount the rear wheels;
Dismount the inner attachment screw (4);
Dismount the shock absorber.
R EMOU NT I NG
Perform in reverse order the dismounting operations, observing the required tightening mo-
ments.
1
2 3
4
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Page 320 of 891
33
REAR A XLES ELEMENTS
33 - 6
Spring
DISMOUNTING
Place the l ocking clamp of the SU S 600 de-
vice, in order to maintain the spring compressed.
Loosen the screws of the wheel on the side
where the dismounting is performed.
Lift the vehicle by means of a two-column
elevator. Dismount the wheel.
Di smount the shock absorber lower attach-
ment nut and screw.
Push the axle and remove the spring.
REMOU NT I NG
Perform the dismounting operations in the
reverse order.
REMARK:
Make sure that springs mounted on
axle have the same characteristics.
SPECIAL TOOLS
Devi ce SUS 600
TIGHTENINBG MOMENTS (daNm)
Wheel attachment screw 7.5
Shock absorber lower attachment nut 7.5
Rear axle spring coil diameter is of φ 16+ 0,08 mm.-0
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36
STEERING ASSEMBLY
36 - 5
Noise absorbant bushing
DISMOUNTIN G
Loosen the screws of the right front wheel.
Lift the vehicle by means of a two-column elevator.
Dismount the right front wheel.
Dismou nt :
-steering box casing protection bellows-left steering rod end;
-the right steering connected rod.
Rotate the steering wheel t o the right (complete turn), the rack is withdrawing towards left.
Remove, by means of a screwdriver the used noise absorber bearing.
R EMOU NT I NG
Carefully clean t he rack and the noise absorber bearing seat and grease with special grease
containing MoS2 and then mount the new noise absorber bearing.
Position the pins (A) in their casing seats.
Rotate the steering wheel to the left until t he rack stands out the bearing.
Remount on the rack: - the steering c onnecting rod (safety washer and limiter washer a re t o be obligatory
positioned on the threaded side of the joint body); -protection bellows.
Check and adjust the parallelism, if necessary.
A
A
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36
STEERING ASSEMBLY
36 - 7
General
CONSTANT POWER STEERING (CPS)
1. Power steering pump
2. Power steering box
3. High pressure piping
4. Low pressure piping
5. Oil reservoir
6. Rotary valve
7. Pressure controller
8. Accessories belt
9. Rigid ducts
10. Steering box working
chambers
The working principle of the Constant Power Steering (CPS ) system, consists in steering
hydraulic assistance by hydraulic fluid (oil) passing through a drawer (the two chambers ( 10)
from steering box) with double effect and through a rotary valve ( 6) that is distributing the fluid
through two pipes (9) towards the steering box ( 2) subject t o the full turni ng direction of the
directing wheels. The hydraulic assistance is ensured by a pressure controller ( 7) attached on the high pressure
pipe (3) and connected to the injection computer.
The injection computer is receiving information, during power steering operation, about the
pressure value in “high pressure circuit” ( which may be seen by means of the CLIP tester). The
pressure value in “high pressure circuit” is depending of the pomp conducted pressure as well as
of the used oil fluidity. The more pressure is high, the power steering pump is absorbing more additional energy.
The power steering pump ( 1) is continuously providing in the circuit a constant hydraulic fluid
(oil) flow, regardless the engine RPM, based on the fact t hat pump is driven by the accessories
belt (8). In this case, the system has the generic denomination of “ Open Center System “
REMARK:
The steering is not to be ful ly locked at maximum m ore than 45 seconds at an engine
RPM of 2500 rot/min (risk of power steering pump damaging).
36054
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36
STEERING ASSEMBLY
36 - 17
Steering connecting rods ........................................................................\
............................... .36 - 1
Manual steering box ........................................................................\
.................................... ... 36 - 3
St eering box pusher ........................................................................\
........................................ 36 - 4
N oise absorbant bushing ........................................................................\
................................ 36 - 5
Bellows ........................................................................\
............................................................ 36 - 6
General ........................................................................\
............................................................ 36 - 7
Power steering box ........................................................................\
..................................... .... 36 - 8
Power steering box pusher ........................................................................\
........................... 36 - 11
Power steering pump ........................................................................\
.................................... 36 - 12
Steering column ........................................................................\
............................................ 36 - 14
36 36 - 1 STEERING ASSEMBLY Steering connecting rods
36 36 - 2 STEERING ASSEMBLY Steering connecting rods
36 36 - 3 STEERING ASSEMBLY Manual steering box
36 36 - 4STEERING ASSEMBLY Steering box pusher
36 36 - 5 STEERING ASSEMBLY Noise absorbant bushing
36 36 - 6 STEERING ASSEMBLY Bellows
36 36 - 7 STEERING ASSEMBLY General
36 36 - 8 STEERING ASSEMBLY Power steering box
36 36 - 10 STEERING ASSEMBLY Power steering box
36 36 - 11 STEERING ASSEMBLY Power steering box pusher
36 36 - 12 STEERING ASSEMBLY Power steering pum p
36 36 - 13 STEERING ASSEMBLY Power steering pum p
36 36 - 14 STEERING ASSEMBLY Steering column
36 36 - 16 STEERING ASSEMBLY Steering column
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40
GENERAL
40 - 20
21
65
43
pict. 10
pict. 11
pict. 12
Power train frame attachment on the lower cross member
The specifi c supports (1 ) and (2) are used in front straightening, front m echanic elements
being dismounted, enabling the positioning of
the lower cross member, consequently the front
attachment of the power train frame (pict. 10).
REMARK :
Thes e holes are destined as main
re ference for the vehicle front part.
Centering under front longitudinal girder
The specifi c supports (3) and (4) are used
for positionin g, centering, and alignment of the front longitudinal girders. They are to be used for
all reparation cases because they are a main reference of vehicle setting on the bench. (pict. 11).
Upper attachment on front shock ab-
sorber (shock absorber column)
S pecific supports (5) and (6) are used in
front strengthening, mechanical elements
dismounted, enabling the positioning of the
shock absorbers ends, consequently the front
linings positioning (pict. 12).
Their centering in the shock absorbers ends
is performed by means of the centering washers
(1)- (fig 13).
The center i ng washers are used when
str aightening a carriage body a nd also when
Carriage body checking
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41
41 - 4
LOWER STRUCTURE
1
Rear longitudinal girder
REPLAC EMEN T
This operation shall be performed only on the repair/checking bench.. For the specific sup-
ports mounting on the bench, please see the 40 chapter.
DISMOUNTIN G
Dismount the damaged elements, which are
in contact with the rear longitudinal girder. Proceed to a straightening on the body
checking/ straightening until bringing the ve-
hicle as closed as possible to the initial shape.
D etach the welding points of the rear
longitudinal girder (1), which are i n contact
with:
- central floor in the area ( 2);
- rear floor in the are a ( 3);
- rear extreme cross member in the area ( 4);
- tank front cross member in the area ( 5);
- tank rear cross member in the area ( 6);
- inner wheel passage in the area ( 7);
- rear towing hock in t he area ( 9).
Detach the welding points between the rear
s ide cross member, re ar floor a nd threshold
closing plate in the area ( 8).
Strai ghten the areas resulted after dismounting.
Grind the areas resulted after dismounting.
R EMOUNTIN G
Position and center the new element by
means of the repairing bench. Weld the rear longitudinal girder following
the assembling outlines 2,3,4,5,6,7, 8 and
9(spots and under gas protection welding) Grind the performed welding.
Protect the performed welding with an
anticorrosive product.
Protect the replaced element with a noise
absorbent product. Mount the co nn ect i on e l eme n ts b y
performing the dismounting operations in the
reverse order.
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