Page 313 of 891
FRONT AX LES ELEMENTS
31
31 - 22
Power train support
Attach a parts support under t he power
train support and dismount: - connection screw anti-roll connecting
rod- steering box crossbar support a nd tilt
over the anti-roll connecting rod downward.
- clamps attachment of the high pressure
duct of the power-assisted steering ( on the
right side); - clamps attachment of the low pressure
duct of the power-assisted steering (on t he left
side);
- attachment screws of the bellows-bearing
GI joint assembly, left tra nsmission on the
gearbox; - lower attachment of the cooling radiator,
on both sides;
-lower a ttachment scre ws of the front
s hock absorbers, both on left and right side;
- steering knuckle arms;
- left transmission from the gearbox;
-r ight transmission from the gearbox.
Carefully lower the parts support towards
ground. Dismount the attachme nt screws of the power
train support to the longitudinal girders, both at
front part as well at rear part.
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STEERING ASSEMBLY
36 - 1
St eering connecting rods
SPECIAL TOOLS
DIR. 1306 Device for steering r ack locking up
in regard to steering box casing.
P. F. 476 Device for ball joints depressing
DIR. 505 Wrench for dismounting/remounting
joint body on rack
Wheels screws 7.5
St eering ball joi nt nut 4
Joint body in rack 5 TIGHTENING MOMENTS (daNm)
Disconnect the battery.
Lift the vehicle by means of a two-column elevator.
DISMOUNTIN G
Depress the rod funnel ba ll joint from the steering knuc kle arm by m eans of the PF 476
device.
Dismount the bellows maintaining clip from the steering box casing.
Turn the wheels hard over to the right, so that rack is m oving towards left.
On the left side
Using the DIR 1306 device , lock up the rack in regard to the steering box casing.
In this position, dismount the joint body from the rack.
Remove the left steering rod.
On the right side, proceed in the same way.
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STEERING ASSEMBLY
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Manual steering box
SPECIAL TOOLS
P. F. 476 Device for ball joints depressing
Wheels screws 7.5
St eering ball joint nut 4
St eering box attachment screws on crossbeam 5
Cardan joint connection screws with
column lower shaft 2.1
TIGHTENING MOMENTS (daNm)
Disconnect the battery.
Loosen the front wheels scr
ews.
Lift the vehicle by means of a two-column elevator.
Dismount the front wheels.
DISMOUNTIN G
In the engine compartment:
Cut the rubber bellows maintaining clip and push it towards cowl panel.
By means of the PF 476 device, depress the ball joints of the steering rods funnel from the
steering knuckle.
Dismo unt :
- connection screw between the cardan joint of the steering column lower shaft and the
steering rack gear shaft;
- steering box attachment screws on the crossbeam.
Detach the steering box assembled with the steering rods.
R EMOU NT I NG
Perform the dismounting operations in the reverse order, observing the required tightening
moments. In case a new steering box is mounted, the parallelism is obligatory to be adjusted, observing
the parallelism adjusting procedure described in chapter 31.
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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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Page 340 of 891

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STEERING ASSEMBLY
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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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STEERING ASSEMBLY
36 - 9
Clamp the two flexible pipes ( supply and
low pressure) by m eans of the MOT 453
device.
Dismou nt :
- clamps attachment for maintaining the
low pressure pipe;
- c onne c tions of t he hi gh a nd low
pressure from the steering box; - low pressure
pi ping (maintaining clip being
previously dismounted); Disconnect the oxyge n sensor, in case of
vehicles equipped according to EURO III
norms.
- exhaust central collar; (under vehicle);
- anti-rocking steering rod from the
cross member support and from the gearbox:
Pow er steering box
Push the descending tube towards vehicle
front. Dismount the four steering box attachment
sc rews on the cross member.
Remove the steering box through the right
side (distribution side).
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STEERING ASSEMBLY
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Power steering box pusher
When an excessive rack clearance,
followed by clattering in the steering box is
occurring, before replacing the steering box,
the pusher with rack is to be adjusted. 1. Noise (clattering) identification.
Lift the vehicle by means of a two-column
elevator; On the pusher side:
- dismount the bellows attachment clip
on the steering box casing;
- push the bellow towards the steering
rod; - hold by hand the rack rod and check
the transversal clearance (up- down). A clearance followed by a noise (clatt ering)
is leading to a pusher noise, during driving. 2. Adjustment
Straigh ten th e caulking (A) of t he
adjustment nut bead (1).
By means of a 10 mm hexagonal wrench,
tighten the adjustment nut until there is no more
clearance.
AT T E N T I O N !
Do not tighten the nut more than 3
teeth.Check if the rack is freely moving all the
length. Bend the adjustment nut bead in the two
opposite slots of the steering box casing, ensuring
in this way its unscrewing.
Positio n the bellows on the steering box casing
and mount a new attachment clip.
Lower the vehicle from the elevator with
wheels on the ground.
Check, during driving if the steering wheel is
coming back to the steering center point.
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STEERING ASSEMBLY
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Steering column
TIGHTENING MOMENTS (d aNm)
Steering wheel attachment screw 4.4
Steering column attachment screw
on driving post 2.1
Connection screw steering column lower
s haft- steering box gear s haft 2.1
DISMOUNTIN G
Disconnect the battery.
Dismount :
- steering wheel cover, clips attached;
- steering wheel attachme nt screw on the
steering column upper shaft, by means of a Torx
wrench (T50);
- steering wheel ( 1) not before ensuring
that that front wheels are straight line disposed
( steering at center point); -half-cases (2) and ( 3) attached t o the
steering column by means of three screws ( 4).
Disconnect the contacts:
- lights, windscreen wiper;
- anti-theft mechanism.
Loosen the screw (5) and dismount the
control under steeri ng wheel ( 6) from the
steering column upper shaft.
Di smount the side attachment screws ( 7)
of the upper part dashboard, by means of a
Torx wrench (T20), “L” shaped.
Dismount the attachment screws (8) of the
upper part dashboard from the l ower part
dashboard. Detach from clips in points ( 9) the upper
part dashboard.
Detach from clips the 3 attachment points
(10) of t he upper pa rt dashboard from the
windscreen lower cross-beam. Sw ing over the upper part dashboard
towards windscreen. For the vehicles equipped with radio:
-d ismount the radio from its support and
disconnect the connectors.
7
97
8
10
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