tires DACIA SUPERNOVA 2004 Repair Manual

VALUES AND SETTINGS
07WHEELS AND TYRES
VEHICLE
DACIA
SUPERNOVA RIMS
5,5B x13
5,5 Jx13H2 TIRES
165 / 70 R 13
PRESSURE (daN/cm
2)
FRON TR EAR
1,9 2,0
Tightening moments of the wheels nuts 7.5 daNm.
Axial run out : max 1 mm
Radial run out : max 1 mm
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GENERAL
30 - 11
BRAKING SYSTEM DIAGNOSTIC
II.
CONSTANT EFFECT AT BEHAVIOUR
EFFECTS
Brakes not accomplishing the
required braking distance
Vibrating brakes
When braking, the vehicle ( front
p art) is left/right deviating
Braking
Heating brakes POSSIBLE CAUSES
- No n- un if o rm wo rn brake lin ings
(backing off);
- Brake linings slightly greased;
- Springs with modified characteristics.
- Brake disks with high wobbling;
- Inconstancy brake disks width;
- Particles abnormal deposit on brake disks
(oxidation between linings and disk).
- Front axl e suspension, steering (to be
checked);
- Stuck piston;
- Tires – wear, inflati on pressure;
- Rigid duct narrowed (flattening).
- Stuck piston;
Automatic adjustment : hand brake cable very
tighten.
REMARK :
Automatic recovering is performed by
means of the brake pedal, if there is no ab-
no rm al t ensi on in the hand brake cable
when released (hand brake released).
- Return spring.
- Insufficient hydraulic stroke of the brake
pump, not allowing the return at rest of
the brak e pump pistons ( brake pump
remaining under pressure);
- Stuck pistons or hardly returning;
- Rigid duct narrowed (flattening);
- Def ective adjustment of the hand brake
control.
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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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GENERAL
30 - 17
PRELIMINARY CHECKING
Before c hecking and adjustment of the front a xle ge ometry, pe rform t he followings
operations: * The checking of tires concerning: - dimensions
- air pressure
- the state of wear;
NOTE :
The t ires must be of same t ype, with the same state of wear, ai r pressured at the
prescribed pressure.
*The check of joints: - the wear of e lastic bushings
- the steering ball joints clearance
- the wheels bearings clearance.
NOTE :
The axial clearance of the bearings must be in admissible limits. ESTABLISHING OF THE STEERING CENTRAL POINT
In order to perform a front a xle checking and adjustment, it is ne cessary t o e stablish the
centra l point in order t o avoid measurement errors.
To do that, bring the steering wheel so that device DIR 500 for steering box ra ck
blocking is enteri ng in the orifice placed at its right upper part .
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WHEELS AND TYRES
CARACTERISTICSRIMS
The wheels identification marking is represented in two ways:
- engraved marking for steel rims
- cast marking for aluminum rims
The marking enables acknowledgment of the main wheels dimensions criteria. This marking
may be:
complete,
Example: 5
1/2 B 13 4 CH 46 ; 5 1/2 J 13 4 H2 46
or simplified,
Example: 5
1/2 B 13 ; 5 1/2 J 13 H2
The wheel bolts (studs) are situated on a diameter of 100 mm.
Maximum axial runout : 1 mm measured on the rim edge ( in G ).
Maximum radial runout : 1 mm measured on the supporting side of the tires beads.
AB C D EF
Whe els Width The rim Æ Nominal Number of Tire Offset
type (in inches) edge profile rim (in inches) wholes under staffing profile (in mm) the tire bead
5
1/2B13 5 1/2B1 34C H46
4 CH48
5
1/2J13 5 1/2J1 34H 246
4H 2
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WHEELS AND TYRES
35CARACTERISTICS
1 - 165 - Tire width in mm ( 1 )
2 - 70 - h / l height / width ratio;
4 - R - Radial structure
5 - 13 - Inner diameter in inches (Æ) ;
this is corresponding with the rim diameter
6 - 79 - Charging index
3 - T - Speed index max. 190 km/ h
Symbols speed
M ax speed
R 170
S 180
T 190
U 200
H 210
V 240
ZR more than 240
Stru cture types :
D iagonal No marking
Radial R
D iagonally belted B
TIRES
Identification marking examples: 165 / 70 R 13 79 T
165 / 70 R 13 79 T
1 2 4 5 6 3
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WHEELS AND TYRES
CARACTERISTICSRIMS – TIRES
The wheels screws tightening moment : 7,5 daNm.
The inflating pressure must be checked at cold.
The temperature raising during driving, leads to a pressure increase from 0.2.
to 0.3 bars. In case temperature checking is done at warm, take i nto account this pressure increase and
never deflate it. A
ir filling pressure
(barr) at cold
Vehi cle Rim T i res Front Rear
R52315 5,5 B13 165/70R13 1,9 2,0
5,5 J13 165/70R13
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BATTERY - FRONT HEADLIGHTS
80 - 8
HEADLAMPS ADJUSTMENT
FOG LAMPS ADJUSTMENT
The fog lamps adjustment is to be performed in the following conditions:
- the vehicle to be placed on a horizontal surface;
- the vehicle has not passengers inside the cockpit or weights in the trunk;
- the tires a re pressurized a t the manufacturer prescribed pressure.
Further on, proceed as follows:
Bring the vehicle at the working place.
Position the adjustment device (headlamp adjustment device – E) in front of an optical center
of a fog lamp.
Switch on the fog lamps.
Rotate the adjustment screw of the fog lamp (D), so that an adjustment of 2 % is obtained and
the separation between the lighted area and the dark one from the adjustment device is located
under the marked line (G).
This adjustment is performed in the same way as for the meeting lights adjustment.
Bring the adjustment device in front of the optical center of the second fog lamp.
Perform the fog lamp adjustment.
Switch off the fog lamps.
G
E
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