DACIA SUPERNOVA 2004 Repair Manual

33
REAR BEARING ELEMENTS
SHOCK ABSORBER
TIGHTENING MOMENTS
Shock absorber inner attachment nut 8
Shock absorber upper attachment nut 1,45+/-0,3
NOTE
The storage of the shock absorbers in the
s pare part s shops i s made i n hori zontal
position.
In these conditions, the shock absorbers,
which are vertically functioning, may de-
st rike.
So, it is enough that before mounting on
the v ehicle, t o proceed on striking the shock
absorbe rs by al t ernat i ve movi ng up and
down of the shock absorber rod in vertical
position.
1. Upper attachment nuts
2. Protector
3. Upper buffer
4. Inner attachment screw.
DISMOUNTING
Remove the shock absorber prot ector (2).
Di smount the upper attachment scre ws (1) (through the trunk).
Loosen the scre ws of the wheel.
Di smount the wheel.
Lift the vehicle by means of an elevator and dismount the inner attachment scre w (4).
Di smount the shock absorber.
REMOUNTING
Pe rform in reverse order the dismounting operations.
Remount: - the shock absorber a t the lower side;
- the shock absorber a t the upper side.
Tighten the nuts at the re quired moment.
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REAR BEARING ELEMENTS
SPRING
DISMOUNTING Place t he locking clamp of t he SUS 600
device in order to maintain the spring
compressed. Loosen the screws of the wheel on the side
where the dismounting is performed.
Dismount the wheel.
Di smount the shock absorber lower attach-
ment nut and screw. Push the axle and remove the spring.
REMOUNTING
Pe rform in reverse order the dismounting operations.
NOTE
M ake sure that springs of each axle have the same characteristics.
REAR SPRING
Coil diameter (mm) Length under load (mm)
F 14,3 230 +/- 10 / 330 daN
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REAR BEARING ELEMENTS
BRAKE DRUM
The t wo brake drums having the same di ameter; t he rectifyi ng of one of t hem obligatory
implies the same opera tion for t he other one.
SPECIAL TOOLS
DISMOUNTING
Extract the plug out of the drum using the
extracting pliers RO441.
Release the hand bra ke, loosening the sec-
ondary cables in order t o allow the hand brake
lever re turn. Pass a screwdriver through the wheel at-
tachment whole from the drum and operate
on the brake lever sector loosening the its
gearing with the hand brake lever. Dismount:
- the steering knuckle nut and washer;
- the drum using PF600 extractor.
REMOUNTING
Clean the drum and the brake plate assembly by means of a cleaner (vacuum cleaner)
for brake. Place back:
- the drum;
- the steering knuckle washer and nut tightening them at the re quired moment;
- the drum plug.
A djust:
- the shoes by applying a repeated pressure to the brake pedal;
- hand brake ( see chapter 37-“Controls”).
DENOMINATION
CODE
Plug extracting pliers RO441
Dr um extractor PF600
TIGHTENING MOMENTS (daNm)
Wheel attachment screw 7.5
Steering knuckle nut16
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33
REAR BEARING ELEMENTS
BRAKE CYLINDER
TIGHTENING MOMENTS (daNm)
Wheel attachment scre w 7.5
Rear wheel steeri ng knuckle nut 16
Pu rging screw 1
Brake rigid piping connection screw 1.5
DISMOUNTING
With the vehicle placed on an elevator
w ith two columns, dismount:
- the wheel;
- the drum plug;
- brake drum;
- upper spring of shoes return, using
pliers FR03.
Space the brake shoes.
Unscrew: - the rigid piping connection on the brake
cylinder by means of an open-end wrench; - the two attachment screws of the
brake cylinder on t he brake plate, loosen-
ing the connection. Check the condition of the shoes brake gas-
kets; if oi l tra ces are present, replace them.
REMOUNTING
Clean t he drums and the brake shoes as-
sembly by means of a cleaner (vacuum
cleaner) for brake. Perform in re verse order t he dismounting
operations. Purge the braking system (see chapter 38).
DEN
OMINATION CODE
Di smounting pliers for shoes return spring FR03
Plug extractor pliers RO441
SPECIAL TOOLS
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33
REAR BEARING ELEMENTS
BRAKE CYLINDER
A djust:
- the shoes, by applying a repeated pressure to the brake pedal;
- the rear axle bearing clearance.
Mount the wheel.
Lower the vehicle from the elevator.
Pu rge the braking system (see chapter 38).
Adjust the hand bra ke.
REPAIRING
DISMOUNTING
Di smount the bra ke cylinder off the vehicle;
Di smount:
- the purging screw;
- the protection bellows;
- the Ö22 pistons assembled with the pressure ga skets.
Check the condition of the cylinder boring, any trace of wear, oxidation or scratches
implies the re placement of the assembled bra ke cylinder.
If the cylinder components are in a good condition, lubri cate them with brake fluid and
mount them in the reverse order of dismounting. Check the easy moving of the assembled pistons in the cylinder boring.
Mount the brake cylinder on the plate;
Mount the wheel brake drum .
Check the adjustment of t he hand bra ke.
Purge the braking system.
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REAR BEARING ELEMENTS
BRAKE SHOES
DISMOUNTING
The re placement of brake shoes must
be performed in complete set, never mount
the brake shoes equipped with brake
linings of different brands and qualities. Dismount :
- t he brake drum ( see t he corre -
sponding paragraph); - the two m aintenance springs (R)
of the shoes with a brake cylinder rod (T). By means of the pliers FR05A the brake
cylinder pistons are immobilized. Remove t he return upper spri ng of the
shoes using the pliers FR03. Release the end of t he ha nd brake cable
off the hand brake lever.
Sw ing the adjustment lever (C) up t o t he
moment it c omes into contact with the re ar
wheel steering knuckle. Distance the shoes from the plate.
S
PECIAL TOOLS
DENOMINATION CODE
Plug extracting pliers RO441
Di smounting pliers for shoes return spring FR03
Pliers for maintaining brake cylinders pistons FR05A
TIGHTENING MOMENTS (daNm)
Wheel screw 7.5
Rear wheel steeri ng knuckle nut 16
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REAR BEARING ELEMENTS
BRAKE SHOES
Di smount the a uxiliary connecting rod (B)
connection from the adjustment lever (C).
Bring the adjustment lever in the initial
position. Rot a t e t he c om pre ssi on sh oe wi t h 90
degrees. Dismount the lower spring.
Remove the (front) compression shoe, then
the tensioning one. REMOUNTING
Pe rform in re verse order t he dismounting
operations.
NOTE
The adjustment of the device for the
automa tic clearance taking over, is
depending of the sp ring tensio ning
caught be tween the rear shoe and the
auxiliary connecting rod.
Measure the value H=1mm, between the
auxiliary connecting rod and the front shoe.
If the va lue H is not c orrect, replace t he
auxiliary connecting rod spring and the
shoes return springs.
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REAR BEARING ELEMENTS
BEARING (25 x 52 x 37)CHECKING
Check by means of a comparing de vice attached on the drum , the axial cleara nce:
0 – 0.15 mm max after m ounting and tightening at the moment of 16 daNm.
DISMOUNTING
Di smount:
- the drum plug by means of the extra cting pliers RO441;
-r ear wheel steeri ng knuckle nut;
- the drum (see the corre sponding paragraph).
Di smount from the drum:
- the boring lock;
- the bearing by means of a tube F38mm.
If necessary, use the extractor CV28 A, in order to extract t he bearing inner ring, remained
on the steering knuckle. DENOMINATION
CODE
Plug extracting pliers RO441
Dr um extractor PF600
SPECIAL TOOLS
TIGHTENING MOMENTS (daNm)
Steering knuckle nut 16
Wheel attachment scre w 7.5
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REAR BEARING ELEMENTS
REMOUNTING
By means of a tube with the outer diameter Ö51mm and a press, mount the bearing up
to t he c onnection with the drum support surface (carefully not to da mage the sealing ri ng). Set back:
- a new lock;
- the drum on the steeri ng knuckle, previously greased with grease;
- a new nut M20 x 1.5 and tighten at the re quired moment;
- the drum plug.
A djust:
- the shoes by applying a repeated pressure on the bra ke pedal;
- hand brake (see chapter 37-“Control s”). BEARING (25 x 52 x 37)
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REAR BEARING ELEMENTS
ELASTIC BUSHING REPLACEMENT
NOTE
For the elastic bushing mounting use the PS701 device, and for dismounting the
extractor P S700. BEARING (25 x 52 x 37)
Di smount by m eans of a press, the worn bushing, using a sleeve with the outer diameter
D= 39mm.
Pr ess the new bushing.
When pressing, observe the value : A=30mm.
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