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Trying to identify one odd caliper bleeder

flhfxd

New member
I was about to start bleeding old fluid out of system when I discovered an odd bleeder on right front caliper. It is a barrel type of bleeder with a hex head insert. No other markings - never seen one before. Anyone can identify?
 
i recently had the exact same question

it's a fitting that BMW uses to connect to some sort of dealer auto bleeder machine. IIRC, you can put a standard bleed screw into the top of it after you unscrew the top bolt. After that, you have a normal bleeding procedure....

Sorry that i can't give you any pics.
 
it's a fitting that BMW uses to connect to some sort of dealer auto bleeder machine. IIRC, you can put a standard bleed screw into the top of it after you unscrew the top bolt. After that, you have a normal bleeding procedure....

Sorry that i can't give you any pics.
Ok. That makes sense. A hook up point for the mityvac.
 
Yes you replace the M10 grub screw with a M10 bleed screw.
You might need to grind the tip of the bleed screw so the thread catch.
(See photo)
image.jpg
 
I think Anton is talking about ditching the entire vent assembly in favor of a standard bleed screw.


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it's a fitting that BMW uses to connect to some sort of dealer auto bleeder machine. IIRC, you can put a standard bleed screw into the top of it after you unscrew the top bolt. After that, you have a normal bleeding procedure....

Sorry that i can't give you any pics.

I tried screwing a bleeder screw where the plug is and it seemed like there was a spring loaded valve below the plug that made using a bleeder screw a pain. Might have just been me though.
 
Look at the earlier post and photo by bigtwin showing the bleed valve and mentioning that the bottom tip of the bleeder might have to be ground down slightly. Yes, there is a spring loaded check valve in there to keep the brake fluid from just pouring out when the cap is removed. The BMW bleed valve will fit in the place of that cap.
 
Factory Fill Adapter

Just remove the entire "barrel thing". There are three on the bike: right front caliper, rear caliper, and "vent" or bleeder line on the slave cylinder for the clutch. (there are two 6mm banjo fittings on the top of the slave cylinder, one goes to the handlebar reservoir/master cylinder, the other is on this 14 inch long bleeder line with the barrel thing on the other end) The barrel thing has a protective black foam sheath over it and a black zip tie holding it to the transverse bar just above the rear swing arm pivot, under and behind the clutch slave cylinder. These are factory installed to facilitate filling each system at the factory. They are also loc-tighted in. Put some muscle on it and replace with the standard M10x1.0 bleed nipple and dust cover, as others have suggested.

Be aware that bleed nipples (bleed screws) do leak around the threads when you bleed or replace the brake fluid. They will leak brake fluid if you pressure fill (from the top or bottom) and brake fluid eats paint, plastic, etc. They will leak air (bubbles) if you are using a vacuum system (looks like you are still getting air out of your lines). Some PVC thread tape will prevent the leaking and save you aggravation and brake fluid.
 
Factory Fill Adapter

Just remove the entire "barrel thing". There are three on the bike: right front caliper, rear caliper, and "vent" or bleeder line on the slave cylinder for the clutch. (there are two 6mm banjo fittings on the top of the slave cylinder, one goes to the handlebar reservoir/master cylinder, the other is on this 14 inch long bleeder line with the barrel thing on the other end) The barrel thing has a protective black foam sheath over it and a black zip tie holding it to the transverse bar just above the rear swing arm pivot, under and behind the clutch slave cylinder. These are factory installed to facilitate filling each system at the factory. They are also loc-tighted in. Put some muscle on it and replace with the standard M10x1.0 bleed nipple and dust cover, as others have suggested.

Be aware that bleed nipples (bleed screws) do leak around the threads when you bleed or replace the brake fluid. They will leak brake fluid if you pressure fill (from the top or bottom) and brake fluid eats paint, plastic, etc. They will leak air (bubbles) if you are using a vacuum system (looks like you are still getting air out of your lines). Some PVC thread tape will prevent the leaking and save you aggravation and brake fluid.
 
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