brake RENAULT TWINGO 2009 2.G Chasiss Workshop Manual

37A-63
MECHANICAL COMPONENT CONTROLS
Clutch circuit: Removal - Refitting
JH3
37A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aRemove:
-the front wheel on the driver's side (see 35A,
Wheels and tyres, Wheel: Removal - Refitting,
page 35A-1) ,
-the front wheel arch liner on the driver's side (see
Front wheel arch liner: Removal - Refitting) (MR
412, 55A, Exterior protection),
-the battery (see Battery: Removal - Refitting)
(MR 411, 80A, Battery),
-the battery tray (see Battery tray: Removal - Re-
fitting) (MR 411, 80A, Battery).
aEmpty the brake fluid reservoir with a syringe.
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aPress and hold the clip (1) .
aPull out the hydraulic clutch control pipe by one
notch.aPress and hold the clip (1) again.
aPull the hydraulic clutch control pipe out another
notch and collect the fluid in a container.
aDepress the clutch pedal to empty the hydraulic
clutch control circuit.
aDetach the pipe at (2) and (3) .
121354
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
121118
121114

37A-64
MECHANICAL COMPONENT CONTROLS
Clutch circuit: Removal - Refitting
JH3
37A
aPull the clip (4) .
aUnclip the end piece (5) .
aRemove the hydraulic clutch control pipe.
aFit anti-contamination caps.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRemove the blanking plugs.
aRefit the clutch control pipe.
aFit the clutch control clip.
aConnect the pipe to the master cylinder and slave
cylinder.
II - FINAL OPERATION.
aBleed the clutch circuit (see 37A, Mechanical com-
ponent controls, Clutch circuit: Bleed, page 37A-
54) .
aTop up the brake fluid reservoir.
aCheck that the clutch system is operating correctly.
aRefit:
-the battery tray (see Battery tray: Removal - Re-
fitting) (MR 411, 80A, Battery),
-the battery (see Battery: Removal - Refitting)
(MR 411, 80A, Battery),-the front wheel arch liner on the driver's side (see
Front wheel arch liner: Removal - Refitting) (MR
412, 55A, Exterior protection),
-the front wheel on the driver's side (see 35A,
Wheels and tyres, Wheel: Removal - Refitting,
page 35A-1) .
121341

37A-74
MECHANICAL COMPONENT CONTROLS
Parking brake cables: Removal - Refitting
EQ UIPMENT LEVEL EA0 or EQUIPMENT LEVEL EA1 or EQUIPMENT LEVEL EA3 or EQUIPMENT LEVEL EA5
or EQUIPMENT LEVEL EAG or EQUIPMENT LEVEL EZ2 or EQUIPMENT LEVEL EZ4
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 tyres,
Wheel: Removal - Refitting, page 35A-1) ,
-the rear brake drums (see 33A, Rear axle compo-
nents, Rear brake drum: Removal - Refitting,
page 33A-19) .
aRemoval:
-the clips (1) ,
-the heat shield (2) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aLoosen nut (3) .
aUnclip the left-hand (5) and right-hand (6) parking
brake cable sleeve stops.
121325
121334
121334

37A-75
MECHANICAL COMPONENT CONTROLS
Parking brake cables: Removal - Refitting
EQ UIPMENT LEVEL EA0 or EQUIPMENT LEVEL EA1 or EQUIPMENT LEVEL EA3 or EQUIPMENT LEVEL EA5
or EQUIPMENT LEVEL EAG or EQUIPMENT LEVEL EZ2 or EQUIPMENT LEVEL EZ4
37A
aDetach the parking brake cables at (7) and (8) .
aUnclip the end of the parking brake cables at (9) .
aUnclip the cable sleeve stops at (10) and remove the
parking brake cables from the rear drum flanges.aPass the parking brake cables into the guides (11)
and remove the parking brake cables.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aFit the parking brake cables by passing them into the
guides (11) and rear brake drum flanges.
aAttach the end of the parking brake cables to the
rear brake pads.
aClip on the cable sleeve stops.
aAttach the cables to the fuel tank.
aFit the cables to the compensator.
aRefit the compensator nut.
II - FINAL OPERATION.
aAdjust the parking brake lever (see 37A, Mechani-
cal component controls, Parking brake lever:
Adjustment, page 37A-48) .
aRefit:
-the heat shield,
-the rear brake drums (see 33A, Rear axle compo-
nents, Rear brake drum: Removal - Refitting,
page 33A-19) ,
-the rear wheels (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
121329
121331
121330

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.
121326
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) .
121329
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.
122228
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.
123865
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