RENAULT TWINGO RS 2009 2.G Chasiss Workshop Manual

33A-13
REAR AXLE COMPONENTS
Rear brake disc: Description
EQ UIPMENT LEVEL SPORT
33A
I - PREPARATION OPERATION FOR CHECK
Position the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
Remove the rear wheel concerned (see 35A, Wheels
and tyres, Wheel: Removal - Refitting, page 35A-1) .
II - CHECKING OPERATION FOR PART
CONCERNED
Position the Palmer tool (1) to measure the disc thick-
ness.Measure the thickness of the disc at 4 points in order
(90˚ apart).
Compare the values with those recommended by the
manufacturer (see 30A, General information, Brake:
Specifications, page 30A-19) .
III - FINAL OPERATION
Replace the discs if necessary (see 33A, Rear axle
components, Rear brake disc: Removal - Refitting,
page 33A-11) .
Refit the rear wheel concerned (see 35A, Wheels and
tyres, Wheel: Removal - Refitting, page 35A-1) . Note:
Use a Palmer type tool to check the thickness of the
disc.
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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.
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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.
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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.

33A-16
REAR AXLE COMPONENTS
Rear brake lining: Removal - Refitting
33A
-the linkage,
-the leading shoe,
-the side retainer springs of the segments, keeping
the connecting rod in contact with the brake back-
ing plate,
aRefit the lower return spring, then the upper return
spring using brake shoe pliers.
aCheck that the parking brake cable is correctly posi-
tioned on the parking brake lever.
aRemove the pliers from the slave cylinder pistons.aUse a screwdriver to adjust the piston ring diameter
with the linkage to obtain a diameter of 202.45 mm ±± ± ±
0.25.
aCarry out the same adjustment on the other side.
aAdjust the handbrake if the lever stops between the
first and second positions of the parking brake le-
ver's travel (see 37A, Mechanical component con-
trols, Parking brake lever: Adjustment, page
37A-48) .
III - FINAL OPERATION.
aRefit:
-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) .
aAdjust the brake pads by depressing the brake pedal
repeatedly.
aCheck that the automatic wear take up system is
working properly (characteristic « click » from the
drums when the brake pedal is repeatedly de-
pressed).
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33A-17
REAR AXLE COMPONENTS
Rear brake cylinder: Removal - Refitting
33A
REMOVAL
I - OPERATION FOR PREPARATION OF PART
CONCERNED
aPosition the vehicle on a 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 drum (see 33A, Rear axle compo-
nents, Rear brake drum: Removal - Refitting,
page 33A-19) .
II - REMOVAL OPERATION FOR PART
CONCERNED
aRemove the upper return spring (1) using brake
shoe pliers.
aRemove the brake shoes.aUndo the rigid brake pipe union (2) on the rear brake
cylinder.
aFit a cap on the rigid brake pipe union.
aRemove:
-the rear brake cylinder bolt (3) on the flange,
-the rear brake cylinder. Tightening torquesm
rear brake cylinder bolt
on the flange14.5 Nm
rigid brake pipe union
on the rear brake cylin-
der15 Nm
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Note:
Expect some br ake fluid to run out.

33A-18
REAR AXLE COMPONENTS
Rear brake cylinder: Removal - Refitting
33A
REFITTING
I - REFITTING PREPARATIONS OPERATION
aRemove any dust from the drums and the flanges
using the cleaning station.
aCheck the condition of the brake cylinder boots and
pistons (replace any faulty parts).
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit:
-the rear brake cylinder,
-the rear brake cylinder bolt on the flange,
-the rigid brake pipe union on the rear brake cylin-
der,
-the upper return spring using brake shoe pliers.
aTorque tighten:
-the rear brake cylinder bolt on the flange (14.5
Nm),
-the rigid brake pipe union on the rear brake cyl-
inder (15 Nm).
III - FINAL OPERATION.
aRefit:
-the rear brake drum (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) .
aBleed the brake circuit (see 30A, General informa-
tion, Braking circuit: Bleed, page 30A-4) .
aAdjust the brake pads by depressing the brake pedal
repeatedly.
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33A-19
REAR AXLE COMPONENTS
Rear brake drum: Removal - Refitting
33A
When a brake drum is replaced, the brake drum on the
opposite side must be replaced as well.
Always replace the brake pads if the brake drums are
being replaced.
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
aRemove:
-the drum caps,
-the brake drum nuts,
-the brake drums.
REFITTING
I - REFITTING PREPARATION OPERATION
aCheck the internal diameter of the drum. Equipment required
par ts washer
Tightening torquesm
brake drum nuts175 N.m
IMPORTANT
To avoid brake imbalance, both drums must be of
the same diameter. Regrinding one drum necessi-
tates regrinding of the opposite drum.
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33A-20
REAR AXLE COMPONENTS
Rear brake drum: Removal - Refitting
33A
aAlways replace the brake drum nuts.
aparts always to be replaced: rear drum cap.
aReplace any faulty parts.
aUsing a parts washer, clean:
-the brake linings,
-the brake drums.
-the stub axle.
II - REFITTING OPERATION FOR PART
CONCERNED
aAdjust the parking brake if the lever stops between
the first and second position of the parking brake le-
ver's travel (see 37A, Mechanical component con-
trols, Parking brake lever: Removal - Refitting,
page 37A-46) .
aRefit:
-the brake drums.
-the brake drum nuts.
aTorque tighten the brake drum nuts (175 N.m) by
turning the drum while tightening the nut.
aRefit new brake drum caps.
III - FINAL OPERATION
aRefit the rear wheels (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) .
aAdjust the brake linings by depressing the brake
pedal repeatedly.
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33A-21
REAR AXLE COMPONENTS
Rear brake drum: Description
33A
I - PREPARATION OPERATION FOR CHECK
Position the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
Remove:
-the rear wheel (see 35A, Wheels and tyres, Wheel:
Removal - Refitting, page 35A-1) ,
-the rear brake drum (see 33A, Rear axle compo-
nents, Rear brake drum: Removal - Refitting, page
33A-19) .
II - TEST OPERATION
Position the sliding calliper to measure the internal di-
ameters of the brake drum.
Measure the interior diameters of the brake drum on
the perpendicular axes (1) and (2) .
Compare the values with those recommended by the
manufacturer (see 30A, General information, Brake:
Specifications, page 30A-19) .III - FINAL OPERATION
Replace the rear drums if necessary (see 33A, Rear
axle components, Rear brake drum: Removal - Re-
fitting, page 33A-19) .
Refit the rear wheel (see 35A, Wheels and tyres,
Wheel: Removal - Refitting, page 35A-1) . Equipment required
sliding calliper
Note:
To check the internal diameter of the drum, use a
sliding calliper type tool for drums.
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33A-22
REAR AXLE COMPONENTS
Rigid brake pipe: Removal - Refitting
C44
33A
The pipes have a rigid section and a flexible section.
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift ( (see Vehicle:
Towing and lifting) ).
aFit the pedal press tool to the brake pedal to limit
the escape of brake fluid.II - OPERATION FOR REMOVAL OF PART
CONCERNED
1 - Rear left-hand rigid brake pipe
aUnscrew:
-the rigid brake pipe union at the brake hose (1) .
-the rigid brake pipe union on the rear brake cylinder
(2) .
aUnclip the rear axle rigid brake pipe (3) .
aRemove the rigid brake pipe. Equipment required
pedal press
Tightening torquesm
rigid brake pipe unions
on the rear brake cylin-
ders15 Nm
rigid brake pipe unions
on the rear brake hoses17 Nm
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
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