wheel DACIA SUPERNOVA 2004 Workshop Manual

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
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FRONT BEARING ELEMENTS
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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.
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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.
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FRONT BEARING ELEMENTS
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BRAKE GASKETS
NOTE
In order to maintain the brake efficiency,
the replacement of the brake pads shall be
made only in complete kit.
Never fit brake pads of diffe rent makes
and different qualities .
DISMOUNTING
Lift t he vehicle by means of a two columns
elevator;
Dismount the front wheel;
Disconnect the wear sensor wire;
Dismou nt : - the safety of the wedges (1);
- the wedges, by sliding them.
Detach the caliper assembly from the fork
together with the flexible hose;
Remove : - the elastic blades - the brake pads
Remount :- the brake pads their places in the fork;
- the elastic blades;
- the caliper;
- the wedges and their locks.
Reconnect the wear sensor wire.
Pr ess several times the brake pedal.
Mount the wheels.
Get down the vehicle from the elevator the
ground. NOTE
It
is forbidden to push the brake pedal
after the calipers were dismounted from
the fork. If the brake pads are not fully used but
on their friction surface, especially i n the
middle pad c hannel, there are material
traces, i t i s recommended t he cleaning of
these surfaces in order to avoid the noise
when braking.
REMOUNTING
Push the c aliper pi ston by means of the
FR 500 s pecial t ool.
SPECIAL TOOLS
FR 500 Pushing piston device
FR 500
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FRONT BEARING ELEMENTS
31 - 7
BRAKE CALIPER
DISMOUNTING
Lift the vehicle by means of a two columns
elevator.
Dismount the wheel.
Disconnect the wear sensor wire
Drain the brake fluid from the reservoir
Remove the locks and the caliper wedges;
Unscrew the rigid duct screw from the brake
flexible hose and detach the caliper assemb ly.
NOTE
If it is necessary to dismount the
caliper fork, unscrew the two attachment
s crews M 12.
When remounting the fork, replace the
Grower washers, tighten the screws at the
r equired moment of 6.5 daNm then seal
them with FIXAMED R 58. REPAIR
ING
Dismount the protection gasket.
Extract the piston using a wooden wedge and
a compressed air source. Remove the sealing gasket from its seat in the
caliper groove by means of a steel blade. Clean with alcohol the parts, replace t he
damaged ones, mounting being performed in the
dismounting reverse order, after previously all
parts have been oiled with brake fluid.
NOTE
Before remounting to t he wheel, c heck
the sealing of the caliper assembly.
TIGHTENING MOMENTS (daNm)
Wheel nuts 7,5
Rigid duct on front flexible screw 1,5
Purging screw 1
Flexible hose - caliper 2
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FRONT BEARING ELEMENTS
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DISMOUNTING
Lift the vehicle by means of a two col-
umns elevator.
Dismou nt :
- the wheel;
- the two attachment screws M 12 ( B)
of the brake disk assemb ly on the steering knuckle;
- the brake pads;
- the t wo sunk screws attaching t he
disk on the hub. BRAKE DISK
The brake disks can be not rectified.
A bigger wear or an important mark on the brake disk braking surfaces impose obligatory its
replacement.
- The minimal accepted thickness : 19 mm
- The maximum accepted axial deviation 0,1 mm on a diameter of F 215.
TIGHTENI NG MOMENTS (daNm)
steering nuckle 6,5
Disk attachment screw on the hub 2,5
Front wheel steering knuckle nut 21
Wheel screws 7,5
Before remounting, check:
- the wear of the flexible hose;
- the wear of the bra ke pa ds and
replace them if necessary. REMOUNTING
Remount :
- the disk on the hub by means of the two
sunk screws M8 and tighten them to the required
moment; - the brake disk assembly on the steering
knuckle, tightening the M 12 screws at t he
required moment. Press the brake pedal several times, in order
to bring the piston in contact with the brake pads.
NOTE :
In case of replacing the brake disk it is ab-
s olutely necessary to replace the brake pads.
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FRONT BEARING ELEMENTS
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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
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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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33
REAR BEARING ELEMENTS
REAR AXLE
TIGH TENING MOMENTS (daNm)
Wheel attachment screw 7.5
Axle attachment nut 8.5
S hock absorber bottom attachment nut 8.0
Re ar axle arm elastic bushing axle nut 12.0
Br ake rigid piping connection screw 1.5
Purgi ng screw 1.0
DISMOUN TING
Lift the vehi cle on two column s
elev ator.
Dismo unt the tw o rear whee ls.
Drain the braking sys tem.
Dis mou nt th e bra ke dr um s.
Disconnect the two-connector screws of
the brake rigid piping of the brake cylinder.
Loosen the connections of the
secondary cable from the hand brake levers
and remove the cable from the brake plates.
Dismou nt th e ope rating rod supp ort of
the brake limiter from the right side axle
arm, after previously both arms protectors
have been dism oun ted . Di
smount the lower attachment screws (A)
of the shock absorber with the re ar axle. Push upward the shock absorbers.
Di smount the springs.
Dism ount the conn ecting screws (B)
between the rear axle arms and the chassis. Dismount completely the rear axle.
Check the elastic bushings condition.
S
PECIAL TOOLS
DENOMINATION CODE
Drum cover pliers R0 441
Hub extractor PF 600
Dismounting pliers for shoe s
return spr ing FR03
S hoes protectors FR09
P liers for ma intaining brake
cylinders pistons FR05A
Dynamometric wrench MOT30
Com paring dial gauge R054A
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33
REAR BEARING ELEMENTS
REAR AXLE
Check and adjust the hand brake cable.
Ad just the cleara nce at t he l imi ter ope rating rod (se e chapt er 37- Bra ke l imite r
adjustment). REMOUNTING
Before remounting, grease with grease the attachment screws of the rear axle shock
absorber bottom and the chassis, consequently, the connecting screws rear a xle-c hassis. Line up the arm s beari ngs right to t he c hassis supports, mounting them without t ighten-
ing at the moment, the nuts with the screws, assembling the axle to the chassis.
Remount the springs.
Compress the axle so that rear springs bear on the tray and set back the shock absorber
inner attachment screws. Tighten at the prescribed moment the connecting screws.
Perform the dismounting operations in the reverse order.
Check the maximum allowed axial cleara nce of the bearing using a dial gauge and the
s upport RO541A.
Note
The maximum allowed axle clearance of the bearing is 0.05mm.
Mount the rear wheels, lower t he vehicle on the ground.
Refill with fluid the brake assembly.
Pu rge the braking system.
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