DACIA SUPERNOVA 2004 Repair Manual

31
FRONT BEARING ELEMENTS
31 - 12
STEERING KNUCKLE BEARING (35 x 65 x 35)
DISMOUNTING
Dismount the steering knuckle (see chapter
“Dis mounting steering knuckle)
Remove the safety ring from the interior of
the steering knuckle; Depress the bi-c onical bearing, using a F 50 mm
outer diam eter rod.
Place the steering rod using a bushing with inner
diameter F 67 mm.
REMOUNTING
Introduce in the steering knuckle the bearing
support washer
Press the bearing in the steering knuckle, by
means of a 63 mm diameter bushing.
Mount the safety ring in the steering knuckle
NOTE:
The operation shall be performed so that
bushing is no t pressed on the bearing
support washer, in order to perform a correct
mounting and not to damage the bearing. The steering knuckle-bearing a ssembly
shall be placed above the hub – disk assembly
and after centering the support washer, press
the bearing on the hub, using a bushing with
the inner diameter of F 36 mm and an exterior
diameter of F 40 mm.
Continue with the mounting of the steering
knuckle assembly on t he vehicle (see the
chapter “Remounting steering knuckle”)
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31
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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31
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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31
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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31
FRONT BEARING ELEMENTS
31 - 16
SP
RING ASSEMBLY AND SHOCK ABSORBER
SP RING-SHOCK ABSORBER REMOUNTING ON THE VEHICLE
P lace the spring on the SUS 600 device shaft (2).
P osition on the spring the upper plate and the upper catch of the shock absorber.
P ut on the shaft the lock bushing (6) , the spacer (5).
Compress the spring by means of the crank (1).
Place the compre ssion plate (7) on the upper catch a nd position the rods grips (8) on the
spring last but one coil. Tighten the nuts (9) till the rods grips (2) came in contact with the spring coil.
Release the crank (1) and detach the compressed spring from the shaft (2).
P lace the shock absorber in the support (4).
P lace on the shock absorber the axial bearing, the lower plate, the buffer, and the spring.
Mount the upper attachment nut of the shock absorber by means of the SUS 601 wrench and
tighten at the required moment.
Un screw the nuts (9) and take out the plate (7) with the rods grips (8).
Mount the spring-shock absorber assembly on the vehicle in the reverse order of dismounting.
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31
FRONT BEARING ELEMENTS
31 - 17
ANTI-ROLL BAR
DISMOUNTING
Unscrew : - the screws of the elastic bushings attachment clamps on longitudinal girders;
- the attachment clamps screws on arm.
Dismount the anti-roll bar.
Check the state of the elastic bushings and bushings.
Replace them if necessary.
REMOUNTING
Mount the bushings and anti-roll bar attachment elastic bushings.
Mount the anti-roll bar.
Press the front axle at half load.
Tighten at the required moment, t he screws of bushing attachment clamps on the arm a nd
those of the elastic bushings attachment on longitudinal girder ( t he mounting position of the
elastic bushings shall be with the slot (A) towards the clamp attachment screw on frame).
TIGHT ENING MO MENTS (daNm)
Screws for attaching the ela stic bushings
clamps on longitudinal girder 2,5
Clamps screws for attaching bushings on arm2,5
FRONT ANTI-ROLL BAR Diameter (mm)
ΦΦΦΦ
24
1
A 43
2
1
1. Bushing
2. Bushing attachment clamp
3.E lastic bushing attachment
clamp
4. Elas tic bushing
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33
REAR BEARING ELEMENTS
CHARACTERISTICS
The rear axle is composed of an axle having a “ U“ shaped torsion profile to which
arms are welded. For the transversal stability and the resistance fa tigue improve ment of the cross- bar,
the a xle is equipped with a F 21-mm diameter stabilizer bar. T he ba r is insert ed by welding
on both ends in the axle side arms. The connection of the axle with the chassis is realized by elastic bushings of the spiral
sp ring and the double effect telescopic shock absorber.
The drum a nd the hub c onstitute a common body, a nd are m ounted on the steeri ng
knuckle by means of a be-c onical beari ng, sealed and pre-set.
33 - 1
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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.
33 - 3
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33
REAR BEARING ELEMENTS
REAR SUSPENTION
Spiral spring and double effect shock absorber.
33 - 4
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