Caliper Pistons

[dricked]

Yes all pistons were pushed back in. One piston popped out (stupidity on my part) but i was able to push it back in.

Before or after cleaning??

Yes, about two reservoirs of fluid. There is no bleed nipple on the master cylinder.

Should i ride it when i get a chance to see if they just need to settle in? Or should i bleed the system again?

I would bleed the system at least another resivour or two. The calipers themselves actually hold a bit of fluid, combined with the lines you may have JUST got it to the point where there's enough in there to work. There's probably still air left in there. If you still have an issue, crack the banjo ever so slightly at the master. Air gets trapped up there and this will help remove it.

If you pushed the pistons back in dirty then there's most likely a bunch of build up on the dust seals.

 

[Livewir3]

I would bleed the system at least another resivour or two. The calipers themselves actually hold a bit of fluid, combined with the lines you may have JUST got it to the point where there's enough in there to work. There's probably still air left in there. If you still have an issue, crack the banjo ever so slightly at the master. Air gets trapped up there and this will help remove it.

If you pushed the pistons back in dirty then there's most likely a bunch of build up on the dust seals.

Okay, will bleed the system again. The pistons were cleaned before pushed back in. I will take a closer look today at the master cylinder to try and locate the banjo.

 

[dricked]

Okay, will bleed the system again. The pistons were cleaned before pushed back in. I will take a closer look today at the master cylinder to try and locate the banjo.

Ok that's good then. Usually bleed until the lever is firm. The banjo is the bolt that attaches the brake line to the master. If a piston popped out you introduced a ton of air into the system and let a ton of fluid out. Bleed until there's no bubbles coming out and then bleed it some more. Your hand will be tired lol.

 

[Livewir3]

Ok that's good then. Usually bleed until the lever is firm. The banjo is the bolt that attaches the brake line to the master. If a piston popped out you introduced a ton of air into the system and let a ton of fluid out. Bleed until there's no bubbles coming out and then bleed it some more. Your hand will be tired lol.

Thanks for the info. Much appreciated. Hopefully i will get sometime this evening to do this.

 

[CrashChris]

To get alot of small air bubbles out i will push the pistons (once cleaned) all the way back into the caliper. This can help move small pockets of air and put as little fluid in caliper as possible. put some wood between pads to keep them separated as far as possible and then bleed the system. Install calipers back on bike (removing wood) and then re-bleed with pads against rotors.
Works great for me.

I don't do this often, only on caliper rebuild or having some sort of problem getting the last bit of air out.