2004 DACIA SUPERNOVA suspension

30
GENERAL
30 - 18
PRELIMINARY CHECKING
Due to the geometr ic conception of the front axle, the modificati on of one of one-
si de angles (castor, camber, ball joint) has no major impact on the value of other side
angles (the parallelism being the one directly influenced). The m odification of t hese a ngles doe s not oc cur duri ng vehicle exploitation, but onl y as
a consequence of a vehicle accident.
It is import ant to observe the following sequence : - placing the vehicle on rotating plates;
- braked vehicle
- suspension checking for pl acing the vehicle at its free height;
- establishing the steering centra l point and steeri ng box blocking.
- attachment of the optical devices on the vehicle, observing the manufacturer
instructions.
REPARTITION CHECKING AND ADJUSTMENT
Check the “ X” dimension symmetry of
the connecting rods.
Reading of t he “ A” value on the scale.
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FRONT BEARING ELEMENTS
31 - 1
CHARACTERISTICS
The front axle is composed of two joint half axles with independents wheels, designed for the
suspension type Mc.Pherson.
The joints of front half axle arm are done by means of an elastic bear ing (chassis side) and
by means of a suspension ball joint (wheel side)
The transmission of the motion to the wheels is done by means of two planetary axles, not
equal, with homocinetic tripod joints.
The wheel hub is assembled in the steering knuckle by means of a preset and sealed
bearing. The brake disks are aerated.
Tigh tening moments (daNm)
Wheel attachment screw 7,5
Suspension arm shaft nuts 7,5
Attachment nut of the ball joint screw 5,5
The nut of the attachment screw of the steering
knuckle with the shock absorber 7,5
Transmissio n nut 21,0
Steering ball joint nut 4,0
The attachment anti roll bar nut 2,5
The connecting strap screw 2,7
The attachment screw of the suspension ball joint on the arm 7,5
The attachment screws of the disk on the hub 2,5
Aux.connecting rod- assembled connecting rod end stop nut 5,0
Assembled connecting rod end- rack joind body 5,0
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FRONT BEARING ELEMENTS
31 - 2
Tightening moments (daNm)
Wheels attachment screws 7,5
Suspension arm shaft nuts 7,5
Attachment nut of the ball joint screw 5,5
Anti – roll bar bearings nuts 2,5
Ball joint attachment screws nuts on the arm 7,5
Str ap screw 2,7
SUSPENSION ARM
NOTE
The dismounting-remounting operations are identical for both half axles. DISMOUNTING
Lift the vehicle on an elevator with two columns.
Dismount the two wheels.
Loosen the attachment nuts (1) of the anti roll bar on the suspension arms.
Detach downward the anti roll bar.
Dismou nt :
- the suspension upper ball joint screw (2) and nut on the steering knuckle;
- the stra p screw ;
- the nuts (3) and the arm attachment axles on the frame ;
- the arm s.
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FRONT BEARING ELEMENTS
31 - 3
SUSPEN
SION ARM
RE MOUNTING
NOTE :
Ensure the presence of t he protection pl ate (A) on the suspension ball joint axle.
Perform the operations in following sequence:
- position the arm to the chassis without tightening the axles nuts (3) .
- mount the ball joint in the steering knuckle
- fix the attachment screw a nd tighten its nut at the required moment ;
Mount the wheel the with the vehicle on wheels continue with:
- remounting the anti roll bar by tightening at the required moment the attachmen t screws.
- tightening of the shaft arm nuts and fixing the strap to the upper part..
The tightening to t he re quired moment of the elastic bushings of the suspension arms is
performed observing the value H1 – H2 = 80 mm.
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FRONT BEARING ELEMENTS
31 - 4
ELASTIC BUSHINGS OF THE SUSPENSION ARM
SPECIAL TOOLS
P.F. 601 Mounting bushings device
P.F. 602
Bushi ng extractor
REPLACEMENT
This operation implies bushings replacement one by one, in order to maintain their centering
as to the arm shaft.
Dismount one of the bushings, by means of the TF 602 device, using a 31-mm outside diam-
eter rod.
Mount the new bushing, observing the value A =239 +/- 0,5 mm.
Dismount the other bushing, proceeding in the same shown way, in order to maintain the value
A = .239 +/- 0,5 mm
Mounting of the elastic bushings is performed by means of the device TF 601.
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FRONT BEARING ELEMENTS
31 - 5
SU
SPENSION BALL JOINT
DISMOUNTING
Perform the same operations like dismounting the suspension arm.
Unscrew the two attachment nuts (3) of the arm shafts, without dismounting them.
DISMOUNT : - the two ball joint attachment screws (4) on the arm;
- the ball joint.
REMOUNTING
NOTE :
Ensure the presence of the protection pl ate (A) on the suspension ball joint axle.
Mount the suspension ba ll joint on the arm , by means of t he t wo attachment screws and
tighten their nuts at the required moment.
Perform then, the same operations as for suspension arm remounting.
BELLOWS REPLACEMENT
Dismount the damaged bellows.
Clean the ball joint in the area covered by the
bellows ( ball j oint body and pin)
Fill the new bellows with a pproximate 3 g
MO S2 special grease
Mount the new bellows on the ball joint
Place on the bellows by means of a resistant
thread, the fixing clip (B), then the fixing clip A
(F = 19).
4
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FRONT BEARING ELEMENTS
31 - 13
Helical spr
ings, hydraulic shock absorber with double effect and anti-roll bar.FRONT SUSPENSION
6 daNm
2 daNm
7,5 daNm 2,7 daN m
3,5 daNm
7,5 daNm 7,5 daN
m 21 daNm
7,5 daN
m
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MECHAN ICAL ELEMENTS CONTROL
37BRAKE FLEXIBLE HOSES
The SUPER NOVA vehicles are equipped with flexible hoses with copper gaskets in order
to ensure the sealing.
PRECAUTIONS IMPOSED TO BE RESPECTED WHENDIS MOUNTING – REMOUNTING A RECEIVER
OR A BRAKE FLEXIBLE HOSE
D ue to security reasons, in order to avoid brake flexible hose twisting and the risk to get i n
contact with the suspension elements, it is necessary to observe the following operations sequence.
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TIGHTENING MOMENTS (daNm)
X (caliper flexible) 2,0
Y (the attachment connection screw of the rigid pipe on the flexible) 1,5
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