Bleeding the brake circuit

Essential equipment

brake bleeding equipment (Renault approved)

diagnostic tool

Precautions to observe during brake circuit bleeding:

• Check the brake fluid levels in the brake circuit and in the bleeding equipment.
• The brake control system circuit must be free of any hydraulic or electrical fault.

I - BLEEDING THE BRAKE CIRCUIT WITHOUT CONTROL SYSTEMS

WARNING

Special precaution during brake circuit bleeding: the ignition must be switched off so that the solenoid valves of the hydraulic unit are not activated.

• This procedure applies after removing or replacing any of the following:

• the master cylinder,
• the brake fluid,
• the hydraulic unit (new and pre-filled),
• a rigid pipe,
• a flexible hose,
• the reservoir,
• a caliper.

• Position the vehicle on a two-post lift.
• Connect the bleeding equipment to the vehicle's brake fluid reservoir (see the vehicle owner's handbook).
• Fit the drain bottles onto the bleed screws.
• Bleed the circuit by opening the bleed screws in the following order (do not forget to close them after the operation):

• rear right circuit,
• front left circuit,
• rear left circuit,
• front right circuit.

• With the engine off, check the pedal travel; if it is not correct, repeat this bleeding procedure.
• Top up the brake fluid level in the reservoir after disconnecting the bleeding equipment. Check that the bleed screws are tightened and that the sealing caps are in place.
• Induce a brake regulation during a road test to check whether the brake pedal travel is correct. If the pedal travel becomes incorrect during the road test, follow the brake regulation circuit bleeding procedure.

II - BLEEDING THE BRAKE REGULATION CIRCUIT

• This procedure applies after a road test with brake regulation during which the pedal travel becomes incorrect.
• Position the vehicle on a two-post lift.
• Connect (see the bleeding unit operating instructions):

• the brake circuit bleeding unit tool (Renault approved) to the vehicle brake circuit,
• the diagnostic tool.

• Fit the drain bottles onto the bleed screws.
• Bleed the regulation circuit using the diagnostic tool.
• Activate command SC006 "bleeding of the hydraulic unit and brake circuits".
• Follow the diagnostic tool instructions.

Note: Throughout the bleeding procedure, alternately press and release the brake pedal (pumping action).

• Disconnect the bleeding unit.
• Top up the brake fluid level in the reservoir.
• Check the tightening of the bleed screws and the presence of the sealing caps.
• Induce a brake regulation during a road test to check whether the brake pedal travel is correct. If the pedal travel becomes incorrect during the road test, follow the brake regulation circuit bleeding procedure

As a result, a quantity of brake fluid greater than the capacity of the circuit may be used.