Renault Scenic 3 Chassis. Manual — part 18
35A
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1
WHEELS AND TYRES
Tyres: Identification
35A
Example of a tyre identification marking: 205/55 R 16
91 V.
Speed index table:
101008
205
Tyre width in mm (l)
55
Height/width ratio (h/l)
R
Radial structure
16
Internal diameter in inches
91
Load index
V
Speed code
Code
Maximum
s p e e d i n
mph (km/h)
R
106 (170)
S
112 (180)
T
118 (190)
U
124 (200)
H
130 (210)
V
149 (240)
ZR
abov e
149
(240)
l
h
c
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2
WHEELS AND TYRES
Wheel rim: Identification
35A
The wheel rims are marked in one of two ways:
- engraved marking for steel wheel rims,
- cast marking for alloy wheel rims.
The marking gives the main dimensional specifications
of the wheel rim.
The marking may be:
- complete, for example 5 1/2 J 144 CH 36;
- simplified, for example 5 1/2 J14.
The wheel bolts are positioned in a circle with a diame-
ter of100 mm (four mounting bolts).
The maximum run-out is measured at the rim edge .
Type of wheel
5.5 J 14
1
Width (in inches)
5.5
2
Rim edge profile
J
3
Nominal diameter (in inches)
14
4
Number of holes
4
5
Tyre bead profile
CH
6
Offset (in mm)
36
100988
1
6
7
4
5
2
3
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3
WHEELS AND TYRES
Balancing
35A
I - PREREQUISITES FOR WHEEL BALANCING
Wheel balancing is a measurement operation.
Several conditions must be met to achieve a reliable re-
sult in a single operation.
The wheel balancer must be installed in accordance
with the manufacturer's instructions.
Never grease the threaded shaft.
Check the condition of the supports, centring compo-
nents and mountings.
Replace any faulty parts (see manufacturer's instruc-
tions).
The wheel and the wheel balancer must be clean.
1 - Wheel
Clean the bearing and centring faces.
Remove any gravel trapped in the tyre treads.
Clean the wheels.
2 - Wheel balancer
Make sure the wheel balancer bearing surface and all
the centring equipment (ring, thrust plate, etc.) are kept
clean.
II - WHEEL REMOVAL AND WHEEL BALANCING
1 - Driver's observation
If the wheels are not correctly balanced this causes the
steering wheel and/or the vehicle floor to vibrate.
The vibrations occur at between 56 mph (90 km/h) and
93 mph (150 km/h).
After the road test:
- lift the vehicle immediately,
- leave the four wheels suspended,
- release the automatic parking brake.
Remove the wheels, positioning the valves upwards.
Be sure to clean the wheel, disc, and hub bearing sur-
faces.
To reproduce the exact vehicle wheel assembly, it is
essential to fit a 60 mm diameter cylindrical centrer on
the wheel balancer.
The wheel is fitted on the wheel balancer as follows:
- (1) wheel balancer back-plate,
- (2) ring, diameter 60 mm,
- (3) wheel,
- (4) wheel locking tool.
After switching on the wheel balancer and entering the
specific wheel parameters, select the « end » balan-
cing mode.
WARNING
Perform a road test of at least 1.25 miles (2 km)
before the wheel balancing operation to prevent a
flat spot forming on the tread when the vehicle is
stationary.
105870
105871
1
2
3
4
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4
WHEELS AND TYRES
Balancing
35A
Place the wheel on the wheel balancer, with the valve
at the top, then lock the wheel in place.
Check that the wheel is not deformed because of acci-
dental impact. If it is, replace the deformed compo-
nents.
Remove any grit which may be jammed in the tyre
treads.
Start the wheel balancer and check that the wheel ba-
lance is below 5 g (dynamic) and 10 g (static).
Otherwise, remove the old balancing weights and re-
peat the wheel balancing procedure to obtain a value
below 5 g on each wheel surface and a value below 10
g when static.
Repeat this operation on the other vehicle wheels.
2 - Balance weights
Only use spare parts weights:
- secured by hooks to steel wheel rims (hooks incorpo-
rated in the weight),
- secured using (flat) hooks, or self-adhesive weights,
for alloy wheel rims.
100681
88659
(5)
Steel wheel rim
(6)
Alloy wheel rim
5
6
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