2009 RENAULT TWINGO Chasiss Workshop Manual

38C-6
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
D4F or D7F, and LEFT-HAND DRIVE
38C
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aRemove:
-the hydraulic unit main mounting bolts (3) and (4)
on the body,
-the « hydraulic unit mounting - hydraulic unit » as-
sembly from the body.aRemove:
-the hydraulic assembly intermediate bracket bolts
(5) ,
-the « hydraulic unit intermediate bracket - hydraulic
unit » assembly (6) from the main mounting,
-the hydraulic unit bolts (7) ,
-the hydraulic unit from its intermediate bracket.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit:
-the hydraulic unit onto its intermediate bracket,
-the hydraulic unit bolts.
aTorque tighten the hydraulic unit bolts on its inter-
mediate bracket ( 8 Nm).
aRefit:
-the « hydraulic unit intermediate bracket - hydraulic
unit » assembly onto the main mounting,
-the hydraulic unit intermediate bracket bolts.
aTorque tighten the hydraulic unit intermediate
bracket bolts on the main hydraulic unit mount-
ing ( 6.5 Nm).
aRefit:
-the « hydraulic unit mounting - hydraulic unit » as-
sembly on the body,
121360
121361
121456

38C-7
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
D4F or D7F, and LEFT-HAND DRIVE
38C
-the hydraulic unit main mounting bolts on the body.
aTorque tighten the hydraulic unit main mounting
bolts on the body (8 Nm).
II - FINAL OPERATION.
aRemove the blanking plugs.
aFit and tighten the rigid brake pipe unions on the hy-
draulic unit.
aTorque tighten the rigid brake pipe unions on the
hydraulic unit (13 Nm).
aConnect the computer connector on the hydraulic
unit.
aRefit:
-the air filter box (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture),
-the fuel vapour recirculation circuit solenoid valve
(see Fuel vapour absorber: Removal - Refitting)
(MR 411, 14A, Emission control),
-the ignition coil (see Coils: Removal - Refitting)
(MR 411, 17A, Ignition),
-the front wheel arch liner, on the passenger side
(see Front wheel arch liner: Removal - Refitting)
(MR 412, 55A, Exterior protection),
-the front wheel on the passenger side (see 35A,
Wheels and tyres, Wheel: Removal - Refitting,
page 35A-1) .
aRemove the pedal press from the brake pedal.
aConnect the battery (see Battery: Removal - Refit-
ting) (MR 411, 80A, Battery).
aBleed the braking circuit (see 30A, General infor-
mation, Braking circuit: Bleed, page 30A-4) .

38C-8
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
D4F, and 780, and LEFT-HAND DRIVE – K4M, and LEFT-HAND DRIVE
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aDisconnect the battery (see Battery: Removal - Re-
fitting) (80A, Battery).
aPosition the pedal press on the brake pedal to limit
the outflow of brake fluid.
aRemove:
-the passenger side front wheel (see 35A, Wheels
and tyres, Wheel: Removal - Refitting, page
35A-1) ,
-the front wheel arch liner (see Front wheel arch
liner: Removal - Refitting) (55A, Exterior protec-
tion).
aRemove the air filter housing (see Air filter unit: Re-
moval - Refitting) (12A, Fuel mixture).aDisconnect the fuel vapour rebreathing solenoid
valve union (1) .
aRemove the fuel vapour rebreathing solenoid valve
(2) .
aRemove the bolts (3) from the bulkhead heat shield.
aMove the bulkhead heat shield (4) to one side. Equipment required
pedal press
refrigerant charging station
Tightening torquesm
hydraulic unit bolts on
its inter mediate bracket8 Nm
intermediate bracket
bolts on the hydraulic
unit main bracket8 N.m
hydraulic unit main
mounting bolts on the
body8 Nm
rigid brake pipe unions
on the hydraulic unit13 Nm
D4F, and 780
109625
122384

38C-9
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
D4F, and 780, and LEFT-HAND DRIVE – K4M, and LEFT-HAND DRIVE
38C
aDrain the refrigerant circuit using a refrigerant
charging station (see Refrigerant circuit: Drain-
ing - Filling) (62A, Air conditioning).
aRemove the "dehydrator reservoir - expansion
valve" connecting pipe (see Dehydrator reservoir -
expansion valve connecting pipe: Removal - Re-
fitting) (62A, Air conditioning).
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the hydraulic unit computer connector
(5) .
aUndo the rigid brake pipe unions (6) on the hydraulic
unit.
aInsert the blanking plugs.aUnclip the fuel pipes (7) .
aRemove the bolts (8) from the hydraulic unit main
bracket.
aRemove the rear suspended engine mounting (see
Lower engine tie-bar: Removal - Refitting) (19D,
Engine mounting).
aFit theunder the engine.
aRemove the right-hand suspended engine mounting
(see Right-hand suspended engine mounting:
Removal - Refitting) (19D, Engine mounting).
aTilt the engine towards the front of the vehicle.
aRemove the "hydraulic unit bracket - hydraulic unit"
assembly from the body. K4M, and AIR CONDITIONING or CLIMATE CON-
TROL
122386
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
122385
K4M

38C-10
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
D4F, and 780, and LEFT-HAND DRIVE – K4M, and LEFT-HAND DRIVE
38C
aRemove:
-the hydraulic unit intermediate bracket bolts (10) ,
-the “intermediate bracket - hydraulic unit” assembly
from the main bracket,
-the hydraulic unit bolts,
-the hydraulic unit from its intermediate bracket.
REFITTING
I - REFITTING OPERATION FOR PART
CONCERNED
aRefit the hydraulic unit on its intermediate bracket.
aTorque tighten the hydraulic unit bolts on its inter-
mediate bracket (8 Nm).
aRefit the "hydraulic unit intermediate bracket - hy-
draulic unit" assembly on the main bracket.
aTorque tighten the intermediate bracket bolts on
the hydraulic unit main bracket (8 N.m).
aRefit the "main bracket - hydraulic unit" assembly on
the body.
aRefit:
-the right-hand suspended engine mounting (see
Right-hand suspended engine mounting: Re-
moval - Refitting) (19D, Engine mounting),-the rear suspended engine mounting (see Lower
engine tie-bar: Removal - Refitting) (19D, En-
gine mounting).
aTorque tighten the hydraulic unit main mounting
bolts on the body (8 Nm).
aClip on the fuel pipes.
aRemove the blanking plugs.
aFit and tighten the rigid brake pipe unions on the hy-
draulic unit.
aTorque tighten the rigid brake pipe unions on the
hydraulic unit (13 Nm).
aConnect the hydraulic unit connector.
II - FINAL OPERATION.
aRefit the "dehydrator reservoir - expansion valve"
connecting pipe (see Dehydrator reservoir - ex-
pansion valve connecting pipe: Removal - Refit-
ting) (62A, Air conditioning).
aFill the refrigerant circuit using a refrigerant charg-
ing station (see Refrigerant circuit: Draining -
Filling) (62A, Air conditioning).
aRefit the bulkhead heat shield.
aFit the fuel vapour rebreathing solenoid valve.
aRefit the union on the fuel vapour rebreathing sole-
noid valve.
aRefit the air filter unit (see Air filter unit: Removal -
Refitting) (12A, Fuel mixture)
aRefit:
-the front wheel arch liner (see Front wheel arch
liner: Removal - Refitting) (55A, Exterior protec-
tion),
-the front passenger side wheel (see 35A, Wheels
and tyres, Wheel: Removal - Refitting, page
35A-1) .
aRemove the pedal press from the brake pedal.
121456
K4M
K4M, and AIR CONDITIONING or CLIMATE CON-
TROL
D4F, and 780

38C-11
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
D4F, and 780, and LEFT-HAND DRIVE – K4M, and LEFT-HAND DRIVE
38C
aConnect the battery (see Battery: Removal - Refit-
ting) (80A, Battery).
aBleed the brake circuit (see 30A, General informa-
tion, Braking circuit: Bleed, page 30A-4) .

38C-12
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
RIGHT-HAND DRIVE
38C
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
aRemove the battery (see Battery: Removal - Refit-
ting) (80A, Battery).aRemove:
-the scuttle panel grille (see Scuttle panel grille:
Removal - Refitting) (56A, Exterior equipment),
-the battery tray (see Battery tray: Removal - Re-
fitting) (80A, Battery),
-the bolts (1) from the secondary brake fluid reser-
voir.
aMove aside the secondary brake fluid reservoir.
aRemove:
-the petrol injection computer (see Petrol injection
computer: Removal - Refitting) (17B, Petrol in-
jection),
-the computer mounting bolts,
-the computer bracket. Tightening torquesm
hydraulic unit bolts on
its inter mediate bracket8 Nm
hydraulic unit inter medi-
ate bracket bolts on the
main hydraulic unit
bracket8 Nm
hydraulic unit main
mounting bolts on the
body8 Nm
rigid brake pipe unions
on the hydraulic unit14 Nm
secondar y brake fluid
reservoir bolts8 Nm
123854
K4M

38C-13
ANTI-LOCK BRAKING SYSTEM
Hydraulic brake unit: Removal - Refitting
RIGHT-HAND DRIVE
38C
II - OPERATION FOR REMOVAL OF PART
CONCERNED
aDisconnect the braking hydraulic unit connector (2) .
aRemove the unions (3) of the rigid brake pipes on
the hydraulic unit.
aFit blanking plugs to the hydraulic unit.
aRemove:
-the bolts (4) from the hydraulic unit main bracket on
the body,
-the “hydraulic unit bracket - hydraulic unit” assem-
bly.
123855
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
123856
123869