In your Birelart brake pump, this ring is the main pivot point between the control lever and the thrust rod. Its function is twofold:

1. Eliminate the game: It allows a "fat" movement without sidebeat. Without it, your brake pedal will have an unpleasant dead race ("blur" effect).

2. Self-lubrication: Generally composed of sintered bronze impregnated with oil, it is designed to operate "dry" or with a minimum of lubricant, thus preventing the premature wear of the steel pivot axis against the aluminum of the lever

BirelArt 22SR pump clips

The 22SR pump cover fills three critical functions:

1. Protection against contaminants: The brake fluid (dot 4 or 5.1) is hygroscopic (it absorbs the moisture of the air). The lid, associated with its internal membrane, prevents water from polluting the fluid.

2. Level maintaining: It secures the tank against projections during major vibrations of the kart.

3. Management of depression: The internal membrane (often associated with the lid) allows the level of liquid to decrease as the platelet wear without creating a vacuum of air in the tank.

This cap (or bellows) is not just a piece of rubber. He plays a crucial role:

1. Anti-contaminant barrier: It prevents track dust, sand and water to enter the body of the pump.

2. Protection of the axis: If dirt enter here, they mix with fat, creating an abrasive paste that will scratch the piston and destroy your internal seals.

3. Maintaining the lubricant: It keeps the clean fat inside the mechanism of the thrust rod.

The Revision kit for diameter brake pump 19 mm is a complete set of original repackaging (Original Freeline Racing Parts). It is essential for restoring absolute sealing, hydraulic pressure and reactivity of your rear brake master cylinder or 19 mm.

As shown in detail the reference photo 12856.jpgThis all-in-one kit brings together all the hardware and internal wear parts necessary for professional refurbishment. Rather than replacing a complete master cylinder, this package of factory parts allows you to eliminate pressure losses, liquid leaks at the pedal and the phenomenon of "spongy pedal" that spoil your chronos on the track.

On your 22SRR pump, the "pin" (pin or pivot axle) of 5x15mm is the piece that undergoes shear forces at each braking.

• Function: It serves as a hinge for the lever that operates the piston of the pump.

• Why a specific room? Unlike a metal rod cut at the right time, this pine is in Treated steel (tempered). If you are using a "soft" stem of hardware, it will dig and deform in a few tours, creating an important game in your pedal (the famous "blur" at the beginning of the race).

The Circlip Birelart is a critical safety piece for your braking system. Its role is to lock the axis that crosses the brake pads inside the stirrup. Without it, the intense vibrations of karting could slide the axis, resulting in the loss of the pads and a total braking failure.

Made of high quality spring steel, this "wire" circlip has a calibrated voltage to stay lodged in the throat of the axis, even under the most severe constraints encountered in competition.

The cup (or lip seal) is a wear part. Its role is to transform the pressure exerted by your foot into hydraulic pressure into the pipes.

• Symptoms of fatigue: "Spongy" pedal (which goes down to the floor), liquid leakage at the bellows (cap), or braking loss during high heat phases.

• The material: These joints are EPDM (ethylene-propylene-diene monomer) to withstand the brake fluid. NEVER USE STANDARD JOINTS Hardware stores, they will disguise in a few minutes in contact with the liquid.