length RENAULT TWINGO 2009 2.G Chasiss Workshop Manual

30A-13
GENERAL INFORMATION
Rigid brake pipe: Repair
30A
This procedure applies to copper pipes diameter 4.7
mm.
REPAIR
I - PIPE PREPARATION OPERATION
a
aCut the pipe to the recommended length using a
tube cutter (see Garage equipment catalogue).
aPut the nuts or bolts on the pipe before forming the
rivets.
II - MAKING THE RIVETS
a Equipment required
compressed air nozzle
Tightening torquesm
brake pipe bolts8 N.m
underbody unions
(female/male)6 N.m
Note:
This procedure does not apply to:
-hybrid pipes (pipe + hose),
-pipes with diameters 6 mm and 8 mm.
WARNING
To avoid causing a breakdown in hydraulic brake
circuit , do not squash or bend the rigid pipe
when cutting.
128666
128643
128665
Note:
To make the r ivets, fit the rivet press in a vice.

30A-14
GENERAL INFORMATION
Rigid brake pipe: Repair
30A
aFit the pipe in the rivet press (see Garage Equip-
ment Catalogue).
aAdjust the length of the pipe to be shaped.
aTorque tighten the press end piece(40 N.m).
III - CHECKING THE RIVETS
aVisually inspect:
-the uniformity of the rivets' diameter,
-the rivet centring in relation to the pipe shaft.aVisually check that the internal diameter of the pipe
is not oval-shaped.
aCheck that the diameter of the end panel is not oval
shaped using a sliding calliper.
Correct diameter if (X1) = (X2)
IV - PREPARATION OF THE PIPE BEFORE
BENDING
a
aBlow inside the pipe in both directions using a com-
pressed air nozzle.
aPut plugs on the bolts or nuts at the ends of the pipe.
aPut the original pipe on a flat base plate that is the
length of the pipe.
128667
128669
128668
128645
Note:
Impurities may spread inside the pipe while the
rivets are being made.

37A-57
MECHANICAL COMPONENT CONTROLS
Clutch circuit: Bleed
JH3 or JR5
37A
2 - Bleed using a new syringe.
aKeep the clutch pedal in the upper position using a
strap attached to the steering wheel to ensure conti-
nuity of the hydraulic circuit during the bleed opera-
tion.
aRemove the bleed plug from the clutch slave cylin-
der.
aConnect a transparent pipe of sufficient length to the
bleed hole (at least thirty centimetres) in order to
place it at the same height as the reservoir.
aOpen the bleed screw.
aFill the brake fluid master cylinder reservoir until
brake fluid flows out of the bleed screw.
aConnect a new hydraulic circuit bleed syringe
filled with a useful volume of 60 ml of approved
brake fluid to the end of the transparent pipe.
aSlowly inject the entire contents of the syringe into
the hydraulic clutch circuit without injecting any of
the air from the top section of the syringe.
aClose the bleed screw.
aRemove the transparent pipe from the bleed hole.
aRefit the bleed plug.
aTop up the brake fluid level in the master cylinder
reservoir.
aDisengage and engage the clutch quickly around
twenty times.
aCheck that the clutch system is operating correctly.
aRepeat the bleed operation if necessary.
aCheck the adjustment of the switch. (see 37A, Me-
chanical component controls, Clutch pedal
switch: Removal - Refitting, page 37A-52) (37A,
mechanical control elements).IV - BLEED PROCEDURE IF PARTS OF THE
HYDRAULIC CIRCUIT ARE REMOVED.
a
Note:
Take care not to disrupt the adjustment of the
clutch start of travel switch.
Note:
The transparent pipe must remain at the same
height as the master cylinder reservoir to prevent
air from entering inside the clutch circuit.
WARNING
The master cylinder pipe must be disconnected
from its take-off point on the br ake fluid reservoir,
to avoid any foreign matter penetrating inside the
hydraulic brake circuit.
WARNING
Prepare for the fl ow of fluid and protect the sur-
rounding components.
Note:
Prefill the hydraulic circuit pipe equipped with a
filter.
Position the filter head facing downwards to
ensure that it fills.

37A-59
MECHANICAL COMPONENT CONTROLS
Clutch circuit: Bleed
JH3 or JR5
37A
aPrefill the hydraulic tappet using the new syringe (by
gravity).
aRefit the part(s) concerned.V - BLEED PROCEDURE AFTER A REMOVING A
COMPONENT OF THE HYDRAULIC CIRCUIT.
aKeep the clutch pedal in the upper position using a
strap attached to the steering wheel to ensure conti-
nuity of the hydraulic circuit during the bleed opera-
tion.
aRemove the bleed plug from the clutch slave cylin-
der.
aConnect a transparent pipe of sufficient length to the
bleed hole (at least thirty centimetres) in order to
place it at the same height as the reservoir.
aOpen the bleed screw.
aFill the brake fluid master cylinder reservoir until
brake fluid flows out of the bleed screw.
aConnect a new syringe containing 60 ml of ap-
proved brake fluid to the end of the transparent pipe.
aSlowly inject the entire contents of the syringe into
the hydraulic clutch circuit without injecting any of
the air from the top section of the syringe.
aClose the bleed screw.
aRemove the transparent pipe from the bleed hole.
aRefit the bleed plug.
aTop up the brake fluid level in the master cylinder
reservoir.
aDisengage and engage the clutch quickly around
twenty times.
aCheck that the clutch system is operating correctly.
aRepeat the bleed operation if necessary.
aCheck the adjustment of the switch. (see 37A, Me-
chanical component controls, Clutch pedal
switch: Removal - Refitting, page 37A-52) (37A,
mechanical control elements).
141809
Note:
Take care not to disrupt the adjustment of the
clutch start of travel switch.
Note:
The transparent pipe must remain at the same
height as the master cylinder reser voir to prevent
air from enter ing inside the clutch circuit.