RENAULT TWINGO RS 2009 2.G Chasiss Owner's Manual

30A-17
GENERAL INFORMATION
Rigid brake pipe: Repair
30A
V - CHECKING BENDING
aCheck the out-of-roundness of the outer diameter at
the centre of the curve radius (2) using a sliding cal-
liper (the out-of-roundness of the outer diameter is
correct if it is less than 10% flattening):
-nominal diameter of the pipe: 4.75 mm,
-minimum diameter after bending: 4.30 mm.VI - REFITTING THE PIPE
a
aTorque tighten the brake pipe bolts (8 N.m).
aTorque tighten the underbody unions (female/
male) (6 N.m).
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Note:
When refitting the rigid brake pipe:
-respect the original routing as much as possi-
ble,
-adjust the pipe routing by hand when fitting
inside the clips.
WARNING
Contact points between the rigid brake pipe and
the surrounding components could cause dam-
age to the pipe. In order to avoid these contacts,
adjust the pipe routing by hand.
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30A-18
GENERAL INFORMATION
Brake fluid: Specifications
30A
BRAKE FLUID REPLACEMENT INTERVAL
Our braking technology, and in particular the disc
brakes (hollow pistons which conduct little heat, have a
low volume of fluid in the cylinder, sliding callipers
avoiding the need for a fluid reserve in the least cooled
area of the wheel), has allowed us to prevent the risk of
« vapour lock » as far as possible, even with heavy
braking (mountainous area). However, current brake
fluids are subject to minor deterioration during the first
months of use due to slight humidity intake. This is why
it is recommended that you change the brake fluid: see
maintenance booklet for the vehicle.
1 - Topping up the level
Wear of the brake pads will result in a gradual drop in
the fluid level in the reservoir.
Do not top up the fluid, as the level will rise again when
the pads are next changed. The brake fluid level must
not fall below the minimum mark.
2 - Approved brake fluid
Mixing two incompatible brake fluids in the brake circuit
may lead to:
-serious risk of leakage due mainly to deterioration of
the cups,
-deterioration in the operation of the ESP system.
To prevent such risks, it is essential to use only brake
fluids that comply with the RENAULT standard (see
Vehicle: Parts and consumables for the repair) .

30A-19
GENERAL INFORMATION
Brake: Specifications
30A
(1) the brake discs cannot be repaired. The brake discs
must be replaced if they are excessively scratched or
worn.Full front brake discs Ventilated front brake discs
Front brake (mm)
Piston diameter 48 48 57
Disc diameter 259 259 280
Disc thickness 12 20.6 24
Minimum disc thickness
(1)10.6 17.7 21.8
Maximum disc run-out 0.03
Brake pad thickness
(including backplate)18 17.5
Minimum pad thickness
(including backplate)68.2
Rear drum brake (mm)
Slave cylinder diameter 17.5
Drum diameter 203.2
Maximum diameter of
drum wear204.45
Drum pad thickness
(including suppor t)5.5
Minimu m d ru m lining
thickness (including
mounting)2.4
Rear disc brake (mm)
Piston diameter 34
Disc diameter 240
Disc thickness 8
Minimum disc thickness
(1)7
Maximum disc run-out 0.06
Brake pad thickness
(including backplate)16
Minimum pad thickness
(including backplate)6

30A-20
GENERAL INFORMATION
Steering: Tightening torque
30A
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30A-21
GENERAL INFORMATION
Steering: Tightening torque
30A
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No. Description Tightening torque (Nm)
(1) Steering wheel bolt 44
(2) Steering column nuts 21
(3) Universal joint bolts on
the steering box24
(4) Steering box bolt 105
(5) Track rod nuts 37

30A-22
GENERAL INFORMATION
Steering: Tightening torque
30A
(6) Wheel bolt 105
(7) Wheel alignment lock nut 53 No. Description Tightening torque (Nm)

30A-23
GENERAL INFORMATION
Axle assemblies: Check
30A
aLock the slip plates of the lift.
aPosition the vehicle on a lift (see Vehicle: Towing
and lifting) .
aCheck the condition of the following components:
-track rods,
-axial ball joint linkages,
-subframe,
-lower arm rubber bushes,
-lower arm ball joints (see Front driveshaft lower
arm ball joint: Check) ,
-shock absorbers,
-tyres,
aCheck:
-the tyre size (see 35A, Wheels and tyres, Tyres:
Identification, page 35A-7) ,
-the tyre inflation pressure (see 35A, Wheels and
tyres, Tyre pressure: Identification, page 35A-
10) .
aPut the vehicle in the VODM position (vehicle in run-
ning order) (see 30A, General information, Under-
body heights: Adjustment value, page 30A-24) :
-tank full,
-vehicle empty (without luggage, etc.).
aConsult:
-the front axle geometry values (see 30A, General
information, Front axle assembly: Adjustment
values, page 30A-31) ,
-the rear axle geometry values (see 30A, General
information, Rear axle assembly: Adjustment
values, page 30A-38) .
aRefer to the user manual for the geometry tester.
aCheck the geometry using the geometry tester.
aIf there is an inconsistency between the manufactur-
er's values and the measured values:
aAdjust the front axle (see 30A, General informa-
tion, Front axle system: Adjustment, page 30A-
36)

30A-24
GENERAL INFORMATION
Underbody heights: Adjustment value
30A
I - MEASURING POINT
Radius under load:
-R1: Distance between the ground and the front wheel
shaft.
-R2: Distance between the ground and the rear wheel
shaft.
1 - Front height (W1): (W1) : Height between the ground and the side mem-
ber (the measuring point is located 23 mm from point B
of the yoke)
2 - Rear height (W2)
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30A-25
GENERAL INFORMATION
Underbody heights: Adjustment value
30A
(W2) : Height between the ground and the bolt shaft of
the rear axle bearing
II - MEASURING METHODS
Measure the heights:
-R1,
-R2,
-W1 right-hand and left-hand,
-W2 right-hand and left-hand.
Special cases:
Fit a bar across the lift.1 - Plate higher than the lift:
Measure the heights (1) , (2) , (3) .
Example: (1) = 6 cm, (2) = 8 cm, (3) = 10 cm.
Calculate the height Wx:
Wx = height (1) + height (3) - height (2) ,
Wx = 8 cm.
2 - Plate lower than the lift:
Measure the heights (1) , (2) , (3) .
Example: (1) = 8 cm, (2) = 10 cm, (3) = 4 cm.
Calculate the height Wx:
Wx = height (1) + height (2) + height (3) ,
Wx = 22 cm.
III - VEHICLE IN RUNNING ORDER POSITION
VODM (Vehicle in working order) position:
-Tank full,
-Empty vehicle (without luggage, etc.).
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Note:
For the measurement of W1 and W2, take into
account the height differences between the plates
and the final drive.
Note:
The value of Wx to be entered into the geometry
bench is the average of the W1 heights, right-hand
and left-hand and of the W2 heights, right-hand and
left-hand.
Note:
If the measuring points are located in empty space
(betw een the rails of the lift), use a bar.
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30A-26
GENERAL INFORMATION
Underbody heights: Adjustment value
30A
W1 = 158 mm ±± ± ±
8 mm
W2 = 270.7 mm ±± ± ±
12 mm
W1 = 163.5 mm ±± ± ±
8 mm
W2 = 275.1 mm ±± ± ±
12 mm
W1 = 157.7 mm ±± ± ±
8 mm
W2 = 270.3 mm ±± ± ±
12 mm EQUIPMENT LEVEL SPORT, and 16" ALUMIN-
IUM WHEELS
EQUIPMENT LEVEL SPORT, and 17" ALUMIN-
IUM WHEELS, and WITHOUT ADDITIONAL
SPORT PACK
EQUIPMENT LEVEL SPORT, and 17" ALUMIN-
IUM WHEELS, and ADDITIONAL EXTREME PACK
Note:
The position of the vehicle varies according to:
-the weight of the engine,
-the springs and shock absorbers,
-the tyres,
-the amount of fuel in the tank.