2004 DACIA SOLENZA wheel

GENERAL
30 - 6
30Composition and dimensions of the main
braking system elements
Front brakes
- brake caliper bore diameter → 54 mm
- brake disk diameter → 235 mm
- disk axial runout measured at → 215 0. 04 mm
- brake disk maximal thickness 20 mm
- brake disk minimal thickness 19 mm
- braking pad thickness (support included) 14 mm
- brake pad minimal thickness (support included) 7 mm
Rear brakes
- wheel braking cylinder bore diameter → 22 mm
- new drum diameter → 228 mm
- drum diameter after grinding → 229 mm
- braking shoes lining width 40 mm
- braking shoes lining thickness 5 mm
- minimal accepted braking lining height above rivets 0.5 mm
Master cylinder
- diameter of bore 20.6 mm
Brake fluid reservoir without alarm sensor
Pressure limiter for circuit in parallel
S ervobrake master vac 7" 177.8 mm
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GENERAL
30 - 14
30Braking system purging
The air existence in the hydraulic circuit may be noticed by an elastic displacement of the brake
pedal, sometimes even, close to the floor. This fact is more evident with the engine running.
GENERAL RE COM M E NDATIONS
· Always use for completion or total changing the brake fluid SAE J 1703 , DOT 4.
· In case of changing the brake fluid it is necessary to wash the system with industrial alcohol.
· During the purging, the brake fluid from the reservoir must not go down bellow the MINIM
level marked on the reservoir.
To perform the purging, one person will stay on the driver place, to press the brake pedal and
the other one will perform t he purging at purging points, using a 500 ml vessel, a tra nsparent
plastic tube and brake fluid for completion.
REMARK:
The brake fluid obtaine4d during performing the purging operation IS NOT TO BE
REUSED, but after 48 hours, to avoid air bubbles introduction in the hydraulic circuit.
PR OCED UR E
Place on the purging screw, a transparent tube with its end in a vessel with brake fluid a nd
proceed as follows : - press the brake pedal slowly;
- dismount the bleeding screw, maintaining the full stroke of the pedal;
- tighten the bleeding screw;
- slowly release the brake pedal.
Repeat the same procedure until complete cease of bubbles.
Pr oceed in the same way also for the other purging places.
T ake into consideration the existence all the time of the brake fluid in the reservoir.
OBSERVATION : Before beginning the purging procedure, dismount the I.C.P. contact
from the brake pump that it will be remounted at the end of the operation, brake pedal released.
It is important to observe the following sequence of the purging points:
1.Main brake cylinder;
2. Left rear wheel brake cylinder;
3. Right rear wheel brake cylinder ;
4. Caliper of front right wheel ;
5. Caliper of front left wheel;
6. By-pass circuit through main cylinder purge.
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GENERAL
30 - 16
30
The influence of angles
The influence of different angles over the road behavior, stability and abnormal wear preventing
of the vehicles tires.
CAMBER
The exit from the tolerance field of the left or right wheel camber, may have as result:
- tires external or internal edge wear (excessive positive or negative camber);
- steerin g is deviating towards the camber angle is more pronounced (asymmetry ), a deviation
from the trajectory is taking place, which must be corrected by means of the steering wheel (the
pronounced wear on the tire in question is occurring);
CASTER
A larger difference of 1° between the right side caster and left side, may have as result:
- a deviation from the trajectory, which must be corrected by means of the steering wheel, the
abnormal tires wear (the pronounced wear on the tire in question is occurring), tough steering,
instability when turning.
PA R ALLELISM
This adjustment has little importance over the vehicle road behavior.
Anyhow, note the followings:
-a prominent closing may lead to tires external edges wear.
-a prominent opening may lead to tires interior edges wear.
DIMENSIONS UNDER CARRIAGE BODY
These are especially influencing the different angles of the steering geometry.
A vehicle, which has run a large amount of km, it will have under the carriage body, dimension s
smaller than a new vehicle. This is the reason why some vehicle manufacturers, are prescribing, when the checking is
done with empty vehicle, different under carriage body dimensions and their respective places
where these values must be taken. Other vehicle manufacturers are recommending the suspension
compression by means of special (specific) tools or loading repartition in different places.
These different procedures (as performing ways) have as final purpose, the cancellation of the
vehicle suspension lowering, which has driven an important number of Km, compared with its
initial condition.
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GENERAL
30 - 17
30Angles checking principle
PRELIMINARY CHECKING
Before starting the steering angles checking, it will be necessary to check the following points
and exclude the possible non-conformities.
1. Tires and rims checking, regarding: - type and dimension;
- inflating pressure;
- wear de gree.
2. Joints : - elastic bearings and bushings condition;
- ball joints clearance;
- bearing clearance;
- steering wheel column clearance.
3. Tires runout and axial runout (compensation is to be performed by means of the reading
instruments);
4. Dimensions symmetry under carriage body (suspension condition).
5. Manufacturer’s method : each vehicle manufactu rer is prescribing the checking conditions,
loading repartition on axles, under carriage body dimensions presentation.
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GENERAL
30 - 18
30Front axles checking and adjustment
THE SEQUENCE OF THE OPERATIONS
Due to the geometric c onception of the front axle, the modification of one of one-side
angles (camber, ball joint, parallelism) has no major impact on the val ue of other side
angles (caster being the one with higher i nfluence). The modifi cation of t hese angles does not occur during ve hicle exploitation, but only as a
consequence of a vehicle accident.
In order to check the front axle angles, it is important to observe the following sequence: - placing the vehicle on rotating plates;
- braked vehicle;
- suspension checking for placing the vehicle at its free height;
- ensuring that front wheels are such disposed for straight line driving;
- attachment of the optical devices on the vehicle, observing the manufacturer instructions.
RE PARTITION CHECKING AND ADJUSTMENT
Check the “X” dimension symmetry of the
connecting rods.
Reading of the “A” value on the scale.
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GENERAL
30 - 21
30Front axles checking and adjustment
THE DEVIATION TO THE LEFT OR TO RIGHT
AT STABLE SPEED
Perform the preliminary checking:
Wheels (front, rear ) : Joints clearance:
- pressure - bushings
- dimensions
- types Checking points heights:
- balancing - symmetry
a.m. conditions
are respected
Correct the faults
The deviation persists
Checking finished
Check the fr ont axle st eering ge ometry
The deviation persists
NO
YES
NO
YES
YES
Check the rear axle
p arallelism and the alignmentA
Checking finished
NO
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GENERAL
30 - 22
30
A
The axle
adjustment is correct
Checking finishedReplacement of damaged
elements
NO
YES
Deviation
persists
Checking finished NOYES
Co
mmute the wheels
unt il the deviation is
balanced.
CAPTION :
To check
Performed operations
F ront axles checking and adjustment
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FRONT AX LES ELEMENTS
31
31 - 1
Chara cteristics
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 bearing (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 a xles, not
equal, with homocinetic tripod joints.
The wheel hub is assembled in the steering knuckle by means of a sealed bearing.
The brake disks a re ventilated.
TIGHTENING MOMENTS (daNm)
Wheel attachment screw 7.5
Suspension arm shaft nuts 10.5
Attachment nut of the ball joint screw 6.2
The nut of the attachment screw of the steering knuckle with the shock absorber 10.5
Transmissio n nut 28.0
Steering ball joint nut 4.0
Attachment anti roll bar screws 4.0
Connecting strap screws 2.7
Attachment screws of the suspension ball joint on the arm 7…..7.5
Attachment screws of the disk on the hub 1.4
Aux.connecting rod- assembled connecting rod end stop nut 5.0
Assembled connecting rod end- rack joint body 5.0
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