2009 RENAULT TWINGO RS brake

37A-76
MECHANICAL COMPONENT CONTROLS
Parking brake cables: Removal - Refitting
EQ UIPMENT LEVEL SPORT
37A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aFit:
-the vehicle on a two-post lift (see Vehicle: Towing
and lifting) (02A, Lifting equipment),
-the parking brake lever in the released position.
aRemove the rear wheels (see 35A, Wheels and ty-
res, Wheel: Removal - Refitting, page 35A-1) .
aRemove:
-the clips (1) ,
-the heat shield (2) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aLoosen nut (3) .
aRemove the handbrake cables from the compensa-
tor at (4) .
aUnclip the sleeve stops (5) from the parking brake
cables. WARNING
To avoid damaging the parking brake cable protec-
tors and causing premature wear of the system, do
not handle the cables with a tool.
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121334
121334

37A-77
MECHANICAL COMPONENT CONTROLS
Parking brake cables: Removal - Refitting
EQ UIPMENT LEVEL SPORT
37A
aUnclip the parking brake cables at (6) .
aUnhook the parking brake cables from the callipers
at (7) .
aMark the tracks of the parking brake cables.
aRemove the parking brake cables.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit the parking brake cables by following their rout-
ing.
aClip the parking brake cables onto the brake calli-
pers.
aClip on the handbrake cables.aClip on the sleeve stops of the parking brake cables.
aRefit the parking brake cables on the compensator.
aAdjust the parking brake cables (see 37A, Mechan-
ical component controls, Parking brake lever:
Adjustment, page 37A-48) .
II - FINAL OPERATION.
aRefit:
-the exhaust heat shield,
-the rear wheels (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
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132468
WARNING
To check the positioning of the parking brake
cables in the compensator, engage and release
the par king brake a number of times. If this fails
to apply the par king brake, position the cables
correctly in the brake compensator.

37A-78
MECHANICAL COMPONENT CONTROLS
Brake servo: Check
RIGHT-HAND DRIVE
37A
There is no “RENAULT” tool to check the braking as-
sistance circuit.
Use a vacuum pump, adapting the end pieces, part
number 7701349942 and 7700105874 with a pipe, part
number 8200027352 or 8200376245.
CHECK
I - PREPARATION OPERATION FOR CHECK
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aRemove:
-the front right-hand wheel (see 35A, Wheels and
tyres, Wheel: Removal - Refitting, page 35A-1) ,
-the front right-hand wheel arch liner (see Front
wheel arch liner: Removal - Refitting) (MR 412,
55A, Exterior protection).II - CHECKING THE SEALS
aWhen checking the brake servo seal, ensure that
there is a perfect seal between this and the master
cylinder at (A) .
If there is a leak in this area, replace the seal be-
tween the brake servo and the master cylinder (see
37A, Mechanical component controls, Master
cylinder: Removal - Refitting, page 37A-1) .
The brake servo seals must be checked when fitted
on the vehicle and when the braking circuit is opera-
tional.
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117948

37A-79
MECHANICAL COMPONENT CONTROLS
Brake servo: Check
RIGHT-HAND DRIVE
37A
III - CHECKING THE BRAKE SERVO
aRemove the non-return valve (6) from the brake ser-
vo (see 37A, Mechanical component controls,
Brake servo non-return valve: Removal - Refit-
ting, page 37A-11) .
aConnect a vacuum pump directly to the brake servo.
aActivate the vacuum pump to obtain a vacuum of
500 mbar.
aCheck that the vacuum does not fall by more than 33
mbar in 15 seconds.
If the vacuum falls by more than 33 mbar in 15 se-
conds, there is a leak which may be:-on the non-return valve seal; in this case replace
the seal (see 37A, Mechanical component con-
trols, Brake servo non-return valve: Removal -
Refitting, page 37A-11) ,
-on the pushrod diaphragm; in this case, replace the
brake servo (see 37A, Mechanical component
controls, Brake servo: Removal - Refitting,
page 37A-14) .
aRefit the non-return valve on the brake servo (see
37A, Mechanical component controls, Brake ser-
vo non-return valve: Removal - Refitting, page
37A-11) .
IV - CHECKING THE NON-RETURN VALVE
aDisconnect the non-return valve pipe on the intake
distributor.
aDisconnect the non-return valve pipe on the vacuum
pump.
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123910
D4F or D7F
K9K

37A-80
MECHANICAL COMPONENT CONTROLS
Brake servo: Check
RIGHT-HAND DRIVE
37A
aConnect a vacuum pump to the end of the non-re-
turn valve.
aActivate the vacuum pump to obtain a vacuum of
500 mbar.
aCheck that the vacuum pressure does not drop. If it
does, the non-return valve is pierced; replace the
valve (see 37A, Mechanical component controls,
Brake servo non-return valve: Removal - Refit-
ting, page 37A-11) .
aRefit the non-return valve pipe on the intake distribu-
tor.V - CHECKING THE VACUUM PUMP
aConnect the external vacuum pump to the engine
vacuum pump.
aStart the engine.
aCheck the following values:
-550 mbar in 5 seconds for an engine speed of 700
rpm,
-700 mbar in 3 seconds and 900 mbar in 5 sec-
onds for an engine speed of 4050 rpm.
aReplace the vacuum pump if the values are different
(see 37A, Mechanical component controls, Vacu-
um pump: Removal - Refitting, page 37A-25) .
aRefit the non-return valve pipe onto the vacuum
pump.
VI - FINAL OPERATION.
aRefit:
-the front right-hand wheel arch liner (see Front
wheel arch liner: Removal - Refitting) (MR 412,
55A, Exterior protection),
-the front right-hand wheel (see 35A, Wheels and
tyres, Wheel: Removal - Refitting, page 35A-1) .
123907
D4F or D7F
K9K
106889

38C-1
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: List and location of components38C
The anti-lock braking system pump assembly is
equipped with a 26-track computer.
102311
(1) Master cylinder pr imar y circuit
(2) Circuit for front left-hand wheel
(3) Circuit for front right-hand wheel
(4) Master cylinder secondary cir-
cuit
(5) Circuit for rear right-hand wheel
(6) Circuit for rear left-hand wheel
19113
(7) Braking computer
(8) Hydraulic assembly

38C-2
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
K9K, and LEFT-HAND DRIVE
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aDisconnect the battery (see Battery: Removal - Re-
fitting) (MR 411, 80A, Battery).
aPosition the pedal press on the brake pedal to limit
the outflow of brake fluid.
aRemove:
-the front wheel on the passenger side (see 35A,
Wheels and tyres, Wheel: Removal - Refitting,
page 35A-1) ,
-the front wheel arch liner, on the passenger side
(see Front wheel arch liner: Removal - Refitting)
(MR 412, 55A, Exterior protection),
-the scuttle panel grille (see Scuttle panel grille:
Removal - Refitting) (MR 412, 56A, Exterior
equipment),
-the scoop under the scuttle panel grille (see Scoop
under the scuttle panel grille: Removal - Refit-
ting) (MR 412, 56A, Exterior equipment),
-the air filter box (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture).aRemove:
-the bolts (1) from the lifting eye on the right-hand
side,
-the lifting eye on the right-hand side (2) ,
-the rigid pipe (3) from the EGR circuit.
aRemove the clip (4) from the soundproofing.
aMove the soundproofing aside (5) to access the hy-
draulic unit. Equipment required
pedal press
Tightening torquesm
hydraulic unit bolts on
its inter mediate bracket8 Nm
hydraulic unit inter medi-
ate bracket bolts on the
main hydraulic unit
mounting6.5 Nm
hydraulic unit main
mounting bolts on the
body8 Nm
rigid brake pipe unions
on the hydraulic unit13 Nm
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121358

38C-3
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
K9K, and LEFT-HAND DRIVE
38C
aDisconnect the hydraulic unit computer connector
(6) .
aUndo the rigid brake pipe unions (7) on the hydraulic
unit.
aInsert the blanking plugs.II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove:
-the hydraulic unit main mounting bolts (8) and (9)
on the body,
-the « hydraulic unit mounting - hydraulic unit » as-
sembly from the body.
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121360
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
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