parking brake RENAULT TWINGO RS 2009 2.G Chasiss Workshop Manual

Contents
37A MECHANICAL COMPONENT CONTROLS
Master cylinder: Removal -
Refitting 37A-1
Brake servo non-return
valve: Removal - Refitting 37A-11
Brake servo: Remo val -
Refitting 37A-14
Vacuum pump: Removal -
Refitting 37A-25
Pedal assembly: List and
location of components 37A-27
Accelerator pedal: Removal -
Refitting 37A-29
Brake pedal: Removal -
Refitting 37A-31
Brake pedal switch: Removal
- Refitting 37A-42
Parking br ake lever: Removal
- Refitting 37A-46
Parking brake lever:
Adjustment 37A-48
Clutch control: List and
location of components 37A-49
Clutch cable: Removal -
Refitting 37A-51
Clutch pedal switch:
Removal - Refitting 37A-52
Clutch circuit: Bleed 37A-54
Clutch master cylinder:
Removal - Refitting 37A-61
Clutch circuit: Removal -
Refitting 37A-63
Manual gear control: List and
location of components 37A-65
Gear control unit: Removal -
Refitting 37A-67
Gear control unit: Adjustment 37A-71
Parking brake cables:
Removal - Refitting 37A-74
Brake servo: Check 37A-7838C ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: List and
location of components 38C-1
Hydraulic brake unit:
Removal - Refitting 38C-2
Front wheel speed sensor:
Removal - Refitting 38C-15
Rear wheel speed sensor :
Removal - Refitting 38C-17
Lateral acceleration and yaw
sensor: Removal - Refitting 38C-19
Braking computer: Removal -
Refitting 38C-21

30A-12
GENERAL INFORMATION
Brake circuit: Tightening torque
30A
(15) Hydraulic unit intermediate bracket
bolt on the main mounting6.5
(16) Hydraulic unit main mounting bolt
on the body8
(17) Hydraulic unit pipe unions 13
(18) Parking brake control nuts 8 No. Description Tightening
torque
(N.m)

33A-1
REAR AXLE COMPONENTS
Rear brake pads: Removal - Refitting
EQ UIPMENT LEVEL SPORT
33A
When replacing brake pads, be sure to replace the
pads on the opposite side.
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRelease the parking brake.
aRemove the rear wheels (see 35A, Wheels and ty-
res, Wheel: Removal - Refitting, page 35A-1) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aUnclip the parking brake cable from the brake calli-
per at (1) .
aMove aside the parking brake cable.
aRemove the lower bolt (2) of the brake calliper guide
pin.
aTilt the brake calliper over.
aRemove the brake pads (3) from the brake calliper
mounting. Special tooling required
Fre. 1190-01Brake calliper piston return
tool.
Tightening torquesm
new lower bolts of the
calliper guide pins35 N.m
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.
132468
132466

33A-3
REAR AXLE COMPONENTS
Rear brake pads: Removal - Refitting
EQ UIPMENT LEVEL SPORT
33A
aFit:
-the brake callipers,
-the parking brake cables.
aTorque tighten the new lower bolts of the calliper
guide pins (35 N.m).
aClip on the handbrake cables.
III - FINAL OPERATION
aRefit the rear wheels (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
IMPORTANT
To avoid any accident, bring the pistons, brake
pads and brake discs into contact by depressing
the brake pad several times.

33A-7
REAR AXLE COMPONENTS
Rear brake calliper: Removal - Refitting
EQ UIPMENT LEVEL SPORT
33A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRelease the parking brake.
aPosition a pedal press on the brake pedal to limit
the outflow of brake fluid.
aRemove the rear wheel (see 35A, Wheels and ty-
res, Wheel: Removal - Refitting, page 35A-1) .II - OPERATION FOR REMOVAL OF PART
CONCERNED
aUnclip the parking brake cable from the brake calli-
per at (1) .
aMove aside the parking brake cable.
aLoosen the calliper brake pipe union (2) .
aRemove:
-the brake calliper guide pin bolts (3) ,
-the brake calliper from the mounting,
-the union between the brake pipe and the calliper,
-the brake calliper.
REFITTING
I - REFITTING PREPARATION OPERATION
aClean using a wire brush and BRAKE CLEANER
(see Vehicle: Parts and consumables for the re-
pair) (04B, Consumables - Products):
-the calliper supports,
-the callipers.
aAlways replace the brake calliper guide pin bolts. Special tooling required
Fre. 1190-01Brake calliper piston return
tool.
Equipment required
pedal press
Tightening torquesm
new bolts on the brake
calliper guide pins35 N.m
brake pipe union on the
calliper13 N.m
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.
132468

33A-8
REAR AXLE COMPONENTS
Rear brake calliper: Removal - Refitting
EQ UIPMENT LEVEL SPORT
33A
aPush the piston to the bottom of its housing using
the (Fre. 1190-01).
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit the brake calliper on the calliper mounting.
aTorque tighten:
-the new bolts on the brake calliper guide pins
(35 N.m),
-the brake pipe union on the calliper (13 N.m).
aFit the parking brake cable.
aClip the handbrake on the brake calliper.
III - FINAL OPERATION
aRefit the rear wheel (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
aRemove the pedal press from the brake pedal.
aBleed the brake circuit (see 30A, General informa-
tion, Braking circuit: Bleed, page 30A-4) .
106309
IMPORTANT
To avoid any accident, bring the pistons, brake
pads and brake discs into contact by depressing
the brake pad several times.

33A-9
REAR AXLE COMPONENTS
Rear brake calliper mounting: Removal - Refitting
EQ UIPMENT LEVEL SPORT
33A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRelease the parking brake.
aRemove:
-the rear wheel (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) ,
-the rear brake pads (see 33A, Rear axle compo-
nents, Rear brake pads: Removal - Refitting,
page 33A-1) .aRemove:
-the brake calliper guide pin bolts (1) ,
-the brake calliper from the mounting.
aAttach the brake calliper to the suspension spring.
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove:
-the brake calliper mounting bolts (2) ,
-the brake calliper mounting. Special tooling required
Fre. 1190-01Brake calliper piston return
tool.
Tightening torquesm
bolts of the brake calli-
per mountingXXX
new bolts of the brake
calliper guide pins105 N.m
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.
132468
132465

33A-11
REAR AXLE COMPONENTS
Rear brake disc: Removal - Refitting
EQ UIPMENT LEVEL SPORT
33A
Brake discs cannot be reground. If there is excessive
scoring or wear, they will need to be replaced (see
30A, General information, Brake: Specifications,
page 30A-19) .
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRemove:
-the rear wheels (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) ,
-the rear brake pads (see 33A, Rear axle compo-
nents, Rear brake pads: Removal - Refitting,
page 33A-1) .aRemove:
-the brake calliper mounting bolts (1) ,
-the "brake calliper mounting - brake calliper" as-
sembly.
aAttach the "calliper mounting - brake calliper" to the
shock absorber spring.
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove the hub's nut cover (2) . Equipment required
par ts washer
Tightening torquesm
new hub nut175 N.m
brake calliper mounting
bolts105 N.m
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.
132467
132456

33A-14
REAR AXLE COMPONENTS
Rear brake lining: Removal - Refitting
33A
Replace all the brake pads on one axle at the same
time. Never mix brake pads of different brands or qual-
ities.
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift ( (see Vehicle:
Towing and lifting) ).
aRelease the parking brake.
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) .
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove the lower return spring (1) , then the upper
return spring (2) using brake shoe pliers.aFit pliers (3) onto the slave cylinder pistons.
aRemove:
-the side retainer springs (4) of the segments, keep-
ing the connecting rod (5) in contact with the brake
backing plate (6) ,
-the leading shoe (7) ,
-the link rod (8) ,
-the trailing shoe (9) .
aUncouple the parking brake cable from the parking
brake lever.
86561
86560

33A-15
REAR AXLE COMPONENTS
Rear brake lining: Removal - Refitting
33A
aRemove the leading shoe:
-the spring (10) ,
-the adjustment lever (11) .
REFITTING
I - REFITTING PREPARATIONS OPERATION
aRemove any dust from the drums and the flanges
using the cleaning station.
aLightly grease the support linkage thread.
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit the leading shoe:
-the adjustment lever,
-the spring.
aConnect the parking brake cable to the parking
brake lever.
aRefit:
-the trailing shoe.
86559
117348
Note:
The brake mechanism components are different
on the left and r ight-hand sides, so it is important
not to confuse them.
Note:
On the left-hand brake: the bolt thread has a
right-hand thread.
On the right-hand brake: the bolt has a left-hand
thread.