Renault Koleos Service Repair Manual: Brake circuit: Precautions for the repair

I - SAFETY

1 - Advice to be followed before any operation

For an operation requiring the use of a lift, follow the safety advice.

The brake regulation circuit must be free of all hydraulic and electrical faults.

In case of incorrect handling, the brake fluid can cause serious injury and damage. Follow the manufacturer's instructions for brake fluid.

To prevent dust from entering the master cylinder reservoir and the brake circuit, the plug must be removed just before filling and closed immediately afterwards,

2 - Instructions to be followed during the operation

Do not press on the brake pedal during work on the brake system.

If, during work on the brake system, any damage on any part is observed, it must be repaired before driving the vehicle again.

Brake fluid is highly corrosive. Ensure any brake fluid spilt on parts of the vehicle is cleaned off.

Use brake fluids that comply with the Renault standard (see Vehicle: Parts and consumables for the repair) .

Check the brake fluid levels in the braking circuit and the bleeding device.

Check that the pressure of the bleeding device is between 1.5 bar and 2 bar.

II - CLEANLINESS

1 - Advice to be followed before any operation

Protect any bodywork components that risk being damaged by brake fluid with a cover.

2 - Instructions to be followed during the operation

Fit blanking plugs recommended for the Siemens K9K injection system at the end of each pipe and in all the openings of the disconnected components of the brake circuit.

Clean around the braking system with BRAKE CLEANER.

Do not allow friction materials to come into contact with grease, oil or other lubricants and cleaning products which are mineral oil based.

III - GENERAL RECOMMENDATIONS

When replacing brake pads, always replace the pads on the other side as well.

When replacing a disc, always replace the disc on the opposite side.

When replacing brake discs, you must replace the brake pads.

Always replace the rigid brake pipe clips.

Reminder:

• The pipes between the master cylinder, callipers and the hydraulic assembly are connected using threaded unions with a metric thread.
• Therefore, only parts specified in the Parts Catalogue for this vehicle should be used.

Parts identification:

• shape of steel or copper pipe end piece (A),
• shape of connecting points on components (B),
• shape of unions (C): 11 mm hexagonal.

Precautions to be taken before and during the brake circuit bleeding operation:

• use brake fluid which conforms to the Renault standard (see Vehicle: Parts and consumables for the repair) (04B, Consumables - Products),
• check the brake fluid levels in the brake circuit and the bleeding device,
• the braking regulation circuit must be free from all hydraulic and electrical faults,
• check that the pressure of the bleeding device is between 1.5 bars and 2 bars.