wheel DACIA SOLENZA 2004 Workshop Manual

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.
vnx.su

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.
vnx.su

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.
vnx.su

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
vnx.su

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
vnx.su

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
vnx.su

FRONT AX LES ELEMENTS
31
31 - 2
TIGHTENING MOMENTS (daNm)
Wheels attachment screws 7.5
Suspension arm shaft nuts 10.5
A ttachment nut of the ball joint screw 6.2
An ti – roll bar bearings screws 4.0
Ball joint attachment screws nuts on the arm 7….7.5
St raps attachment screws 2.7
Suspension arm
REMARK :
T he dismounting-remounting operations are identical for both half axles (specifying
that on the right side one strap is provided and on the left side two straps are provided).

DISMOUNTING
Disconnect the battery.
Loosen the front wheels attachment screws.
Lift the vehicle on an elevator with two columns.
Dismount the two wheels.
Dismount the anti roll bar attachment screws (1) on the suspension arms.
Detach the anti roll bar.
Dismou nt :
- the suspension upper ball joint screw (2) and nut on the steering knuckle;
- the upper attachment strap screw on the right/left wing lining;
- the nuts (3) and the arm a ttachment axles on the power train a nd the strap (straps);
- the arms.
12
vnx.su

FRONT AX LES ELEMENTS
31
31 - 3
Suspension arm
REMOU NT I NG
REMARK :
Ensure the presence of t he protection pl ate (A) on the suspension ball joint axle.
Perform the operations in the following sequence:
− Arm attachment on the power train support without tightening to the required moment
the axles nuts (3) .
− Ball joint mounting in the steering knuckle
− Attachment of the ball joint screw and tightening its nut to the required moment ;
M ount the wheels, tighten the screws to the required moment, and then with the vehicle on
wheels, continue with:
– Remounting the anti roll bar by tightening to the required moment the attachment screws.
– Tightening the shaft a rm nuts a nd fixing the strap (straps) – (4) to the upper pa rt, by
tightening the screws to the required moment.
REMARK :
When remounting the attachment buffers on the anti roll bar, put inside them 1 g of
grease type MOYKOTE 33 MEDIUM.
When remounting the suspension arm axles, use new self-locking nuts.
3A
vnx.su

FRONT AX LES ELEMENTS
31
31 - 7
Brake lining (pads)
REMARK :
In order to maintain the brake efficiency,
the replacement of the brake l ining (pads)
shall be made only in complete kit. Brake pads brand TEXTAR are to be used
as spare parts.
DISMOUNTIN G
Loosen the front wheel attachment screws.
Lift the vehicle by means of a two-column
elevator.
Dismount the front wheel.
Disconnect the wear sensor wire.
Remove: - the safeties of the wedges ( 1);
- the wedges, by sliding them.
D etach the caliper assembly from the fork
together with the flexible hose.
Remove:
- the brake pads from fork seats
(maintaining springs are attached with them);
- the maintaining springs from the brake
pads. REMARK :
It is forbi
dde n t o push the brake
pedal after the c alipers were
dismounted from the fork. If the brake pads are not fully used
but on their friction surface, especially
in the middle pad channel, there are
material traces, it is recommended the
cleaning of these surfaces in order to
avoid the noise when braking. Irregularly we ar of one brake pad or
wear diffe rences between t he inner pad
the outside pad, greater than 10% of the
minimum remaining l ining, impose the
kit replacement.
SPECIAL TOOLS
FR 500 P ushing piston device
1
vnx.su

FRONT AX LES ELEMENTS
31
31 - 8
Remount :
- the maintaining springs on the brake pads;
- the brake pads their places in the fork, assembled with the maintaining springs;
- the caliper
- the wedges and their locks
Pr ess several t imes the brake pedal, in order to place in c ontact the c aliper piston with the
brake pads. Mount the wheels
Get down the vehicle from the elevator.
Tighten to the required moment, the front wheels attachment screws.
FR 500
REMOU NT I NG
Push the caliper pi ston by means of the FR 500 device.
Brake lining (pads)
vnx.su