2004 DACIA SUPERNOVA Repair Manual

30
GENERAL
30 - 20
Three situations may appear:
1.
CORRECT INCORRECTPe rform the same rotation number of the tie rod
connecting rod on left side and on the right side until
obtaining the same value ”A”.
2
. INCO RRECT CORRECTAdjust the parallelism at the same value for l eft and
right side ensuring the same value “A” on both sides.
3
. INCO RRECT INCORRECTPerform first the repartition in order to balance the value
“A” on each side, than adjust the parallelism (see Case 2 }.
PARALLELISM REPARTITION CORRECTION WHICH MUST PERFORMED
CHECKING OF THE FRONT AXLE ADJUSTMENT
vnx.su

30
GENERAL
30 - 21
DIAGNOSIS
THE DEVIATION TO THE LEFT OR TO RIGHT AT STABLE SPEED
Pe rform the preliminary checking:
Wheels (front, rear) : Joints clearance:
- pressure - bushings
- dimensions
- types Checking points heights
- balancing - simetri e
A.m.
conditions
are respected
Correct the defi cient
The deviation persists
Checking fi nished
Check the front axle
steering geometry
The deviationpersists
NO
YES
NO
YES
YES
Check the rear axle
parallelism and the alignmentA
Checking fi nished
NO
C HECKING OF THE FRONT AXLE ADJUSTMENT
vnx.su

30
GENERAL
30 - 22
A
The axle
adjustment
is correct
Checking fi nishedReplacement of damaged
elements NO
YES
Deviation persists
Checking fi nished NOYES
Commute the wheels until
the deviation is balanced
CAPTION :
To check
Performed opera tions
DIAGNOSIS
C
HECKING OF THE FRONT AXLE ADJUSTMENT
vnx.su

31
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
vnx.su

31
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.
vnx.su

31
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.
vnx.su

31
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.
vnx.su

31
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
vnx.su