2004 DACIA SUPERNOVA ABS

DRIVE SHAFTS
29
FRONT TRANSVERSAL TRANSMISSION
DISMOUNTING - THE SIDE TO WHEEL
Loosen the left wheel screws.
Lift the vehicle on an elevator with two columns.
Di smount the wheels.
Di smount the scre ws that attach the brake disk assembly on the steering knuckle.
Un screw the transmission nut by means of the RO 604 – 01 device.
Di smount :
- the nut of t he steering ball joint;
- steering ball joint from the steering knuckle, by means of the PF 476 extractor; the
attachment screws of the steering knuckle on the shock absorber end. S
PECIAL TOOLS
- RO 604-01 Hub immobilizing device
- PF 476 Ball joint extractor
TIGHTENING MOMENTS (daN/m)
- Transmission nut 21\
- Screw for fixing the bellows lid on the gearbox 2,5
- Wheels attachment screw 7,5
- Screws, nuts for fixing the steerin g knuc kle on the shock absorber 7,5
- Screw for fixing the caliper on the steeri ng knuckle 6,5
- Nut for steering ball joint 4
Pu sh the transmission in the steering knuckle and incline the latter.
Di smount the transmission, the wheel side.
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GENERAL
30 - 13
BRAKE FLUID
PERIODICITY OF THE BREAK FLUID CHANGE
The manufacturing conception of the brakes equipping the Dacia vehicles, especially
the di sks brake type (F 54 inner empty pistons, low qua ntity of fluid in t he c ylinders,
sliding calipers avoiding existence of a fl uid reserve in the less cooled area of t he wheel)
enable t he m aximum re jection of fluid vapori zation ri sk, even in c ase of intensive using of
brakes (mountain are a). The current bra ke fluids are subject in all cases to a slight degradation during the fi rst
months of use by a slight humidity absorpt ion seri es (see the Vehicle Warra nty and
Maintenance Booklet, for brake fluid change)
LEVEL COMPLETION
The wear of brakes pads and shoes generate a gradually diminution of brake fluid level
in its reservoi r. It is useless t o compensate t his diminution, because the level will be re -
stored in the moment of next changing the brake pads and shoes. Obviously, in the mean-
time, the level of brake fl uid in re servoir must not go down bellow the minimal mark.
HOMOLOGATED BRAKE FLUIDS
The mixture i n t he bra king circuit of two non compatible brake fluids may leads to loss
important risks mainly due to gasket damage
In order t o avoid such risks, it is obligatory t o use bra ke fluids checked and approved by
our laboratories and which are accordi ng to Norm SAEJ 1703, DOT 4.
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GENERAL
30 - 16
THE INFLUENCE OF THE FRONT AXLE ANGLES ON THE ROAD
BEHAVIOR (VEHICLE COMPORTMENT) AND ON TYRES WEAR
CAMBER ANGLE 0
0 +/- 30’
It is formed by the wheel plane with the vertical that crosses the wheel axis.
A difference higher that 1° between the two angles leads to :
- the deviation from the trajectory that must be adjusted by means of the steering wheel.
- abnormal wear of the tires and bearings.
The angle is not adjustable.
THE BALL JOINT ANGLE 12
045’ +/- 30’
It is formed in transversal plane between the axe connecting the attachment point of the
shock absorber with the ball joint center and the vert ical passing through the wheel axis.
The ba ll joint angle i s genera ting a ne gative offset, allowing the maintaining of the vehicle
route when the braking is unequal distributed. The angle is not adjustable.
THE CASTER ANGLE 2
030’
It is formed in longitudinal plane, between the axis connecting the attachment point of the shock
absorber with the suspension ball joint center and the vertical axis passing through the wheel axis. A difference higher than 1° between the two angles leads to : - the deviation from the trajectory that must be adjusted by means of the steering wheel.
- a normal wear of the tires.
The angle is not adjustable.
STEERING BOX POSITIONING
The steering box must be at a certain height from the attachment points of the steering auxiliary
connecting rod ball joints. The position of the steering box (choking) is influencing the variation
of the parallelism. The steering box is mounted in the position for which the variation is minimal.
The modification of t he para llelism between left side and right side leads to: - the deviation of the vehicle, in one sense, upon accelera ting;
- the deviation of the vehicle in the opposite side upon braking.
- the deviation of the tra jectory on the hilly ground;
- the premature wear of the tires.
The horizontally of the steering box is ensured by the producer.
PARALLELISM
( TOE-IN OR ANGULAR SPREAD ANGLE )
It is measured in horizontal plane as a differen ce between the front and rear part of the same axle wheels.
The wheels are divergent. The value of the opening is between 0 – 2 mm (1 +/- 1 m m).
ATTENTION:
A too much opening causes the wear of the tires on the inner pa rt of the camelback.
A too much closing causes the wear of the tires on the exterior part of the camelback.
The para llelism is adjustable by rotating the tie bar of the steering connecting rod.
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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 - 10
SPECIAL TOOLS
Hub disk extractor PF600
Ball joint extractor PF476
DISMOUNTING
Disconnect the battery.
Lift the vehicle by means of an elevator with
two column. Dismou nt :
- the wheel
- the brake disk assembly together with
the flexible connection;.
- the transmission gear nut.
- the brake disk a ssembly by means by
means of the PF 600 extractor.
Continue by dismounting t he steering
knuckle, observing the operations sequence: - dismount the steering ball joint nut;
- depre ss the steeri ng ball joint by
means of the PF 476 extractor;
- dismount the t wo screws that attach
the steering knuckle on the shock absorber; - dismount the attachment screws that
attach the steering ball joint – steering knuckle;
- detach the steering knuckle.
TIGHTENING MOMENTS (daNm)
Wheel attachment screw 7,5
Steering ball joint nut 3,5
Transmission nut 21
Attachment fork screw on steering knuckle 6,5
The screw nut of the steering knuckle
attachment with the shock absorber leg 7,5
The attachment screw nut of the ball
joint with the steering knuckle 5,5
STEERING KNUCKLE
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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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FRONT BEARING ELEMENTS
31 - 14
S
HOCK ABSORBER, SPRING
TIGHTENING MOMENTS (daNm)
S hock absorber rod nut 6
Shock absorber lower attachment nut 7,5
Shock absorber upper attachment screws 2
The shock absorbers are stored in t he spare
parts warehouses/shops in horizontal position.
In these conditions, it is possible that shock
absorbers working vertically, to get depressed.
Therefore, before mounting on the vehicle, it
is sufficient to perform the shock absorbers
pressing, by alternatively shifting the shock
absorber rod (upwards a nd downwards), the
shock absorber being in vertical position. S
HOCK ABSORBER
1. Upper attachment nut
2. Lower attachment screw
3. U pper catch
4. U pper plate
5. Shock buffer
6. Lower plate
7. A xial bearing
NOTE :
It is necessary that the springs of every axle have the same characteristics.
FRONT SPRING
Coil diameter (mm) Length under load (mm) F 12,5 194 +/- 10 / 330 daN
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FRONT BEARING ELEMENTS
31 - 15
SP
RING ASSEMBLY AND SHOCK ABSORBER
DISMOUN T ING SPRI NG- SHOCK AB SOR B E R ASSE MB LY OFF T HE
VEHICLE
Lift the vehicle in the part where perfo rming
the dismounting. Dismo unt :
- the wheel
- the two lower a ttachment screws of
the shock absorber leg (1 ).
- the two upper a ttachment screws of
the shock absorber on the carriage body (2).
T ake out the assembly spring – shock
absorber, by pressing on the lower arm in
order to avoid the shock absorber came in
contact with the transmission bellows.
SEPARATE SPRING FROM SHOCK ABSORBER
Place t he shoc k absorbe r on t he shoc k
absorber support (4), of the base plate (3) of
the SU S 600 device.
Place the compression plate (7) on the spring
upper catch and position t he rods gri ps (8) on
the spring lower last but one coil. Com p re ss t he sp ri ng by a l t e rna t i ve l y
tightening the nuts (9) till release it from the lower
plate of t he shock absorber. Dismo unt the upper attachment nut of the shock
absorber by means of the SUS 601 wrench.
T ake out the spring.
Place the spring on the SUS 600 de v ice shaft (2).
P ut on the shaft the lock bushing (6), the spacer (5), and tighten to the required moment t he
crank (1) till the lock bushing (6) comes into contact with the upper catch of the shock absorber.
U nscrew alternatively the nuts (9) and take out the plate (7 ) and the rods grips (8).
Release the spring by means of the crank (1) and detach from the shaft (2), the upper catch of
the shock absorber, the upper plate, a nd the spring.
1 2
2
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