Self-lubricating flange ring 5x7x7 Birelart

Summary: Why this ring ?

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.

- Technical specifications

- Mounting Tuto: Precision First All All

A 5x7x7 ring is fragile during installation. Never force.

1. Housing cleaning: Before you place the new one, clean the bore in the lever with a cotton swab soaked in brake cleaner. It must not remain any trace of old dried grease.

2. Verification of the axis: Pass your nail on the pin (pin) that crosses the ring. If it is marked, change it! A new ring on a striped axis will last two sessions.

3. Setting up: The ring must enter with the thumb. If it strength, check that it is perfectly in the axis. Never use hammer, you would write the bronze.

4. "Dry" or lightweight mounting: These rings are self-lubricating. Do not overload thick grease. A drop of fine oil type PTFE or Teflon is enough. The thick grease mixed with the track dust turns into abrasive paste that eats the ring in record time.

💡 Michel's trick

"It's a piece that we forget too often, and it is there that the braking feel is lost. The trick: If after a few outputs you feel again in your brake pedal, do not change the pump immediately. First inspect this ring. My Pro Council: Whenever you disassemble your pump for purge or revision, pass a dry cloth shot on this ring to remove black dust. If she shines, she is good. If it is matte and has scratches, replace it immediately: for the price of the room, it changes the life of your braking. "

❓ FAQ SEO (Frequently Asked Questions)

Q: Why does the ring have a "flange" (a flange) ?

A: The flange serves as a side stop. It prevents the ring from sliding through the lever hole and serves as friction spacer against the walls of the pump holder.

Q: Can I manufacture this copper or plastic ring ?

A: Especially not. The sintered bronze has specific properties of hardness and porosity to retain the lubricant. Plastic crash and pure copper would joke instantly against steel.

Q: Is it compatible with other brand brake pumps ?

A: Birelart uses standard dimensions, but the bore tolerance is specific. It is strongly recommended to use the original Birelart part to avoid any game.

✅ Ready for reassembly ?

Your braking is the most important system for your safety and performance. To finish your revision:

• [Nettoyant frein] (Essential to keep the pivot clean).

• [Goupille/Axe de pivot] (Check that it is not worn, otherwise the ring is useless).