Hs33 Master Pistons

[1handedluke]

right I've noticed that my rear Maggie is leaking from the master piston inside the lever, and I've got another broken body which is the same model,

but I just cant seem to get the lil critters out of the pistons without destroying them, anyone know of a good and easy way of extracting them?

[Borat]

Bleed syringe and finger over olive hole/ or it just be connected upto the rest of the system.

Fill the syringe up with water, then push it through (the slave bleed bolt being doneup!)

The piston should pop out!

[1handedluke]

haha wicked idea, but I've never used a syringe always bled my brakes in a bucket of water any other way?

[PeanuckleJive]

Bleed syringe and finger over olive hole/ or it just be connected upto the rest of the system.

Fill the syringe up with water, then push it through (the slave bleed bolt being doneup!)

The piston should pop out!

This, the lad beat me to it

Obviously, be careful to do it slowly and not try to force it too much or you'll probably end up covered in water with a magura master piston stuck in your forehead

EDIT: Just noticed you want another method, crap.

you could overbleed your brakes (bleed them while you hold the pistons out so that the system holds more water than usual, if this makes sense)

and then push the slaves back in at the same time, which will push on the master piston and hopefully push it out

Edited May 1, 2010 by PeanuckleJive

[1handedluke]

This, the lad beat me to it

Obviously, be careful to do it slowly and not try to force it too much or you'll probably end up covered in water with a magura master piston stuck in your forehead

EDIT: Just noticed you want another method, crap.

you could overbleed your brakes (bleed them while you hold the pistons out so that the system holds more water than usual, if this makes sense)

and then push the slaves back in at the same time, which will push on the master piston and hopefully push it out

yeah goood idea!!! also just found a really old magura motorbike lever, which has the same mountings so I can also just attach that and pop it out, cheers guys

[Happydaze]

If that dont work, give terry a text, he has keys to the workshop and we will blow the bastards out with a large air line. Laters Al

[Danny]

Shove an old spoke down the bleed hole and push

[trials owns]

Shove an old spoke down the bleed hole and push

yep that works every time.

[Borat]

No it doesn't.

If your using an 04 lever, like mine it will.

05 levers are different.

Just get a pair of mole grips or plyiers and pull it out gently.

Edited May 1, 2010 by Borat

[cant_ride]

No it doesn't.

If your using an 04 lever, like mine it will.

05 levers are different.

Just get a pair of mole grips or plyiers and pull it out gently.

Yeah I can vouch for that.. I had to destroy about 3 of each type when I was doing my brake lever project at uni (I still need to show you the finished version don't I ?) Spoke is best for the old, mole grips for the new. You can use the ones you stole off me years ago.. you know, the ones you covered in beer! You bugger.

Oli

ps You really don't need to be all that careful. If you saw the state of the cylinders in my prototype (That were bored with B&Q own brand dremel tools) and how damaged the old magura pistons in there are you'd probably feel just as happy using a chainsaw to get out your piston. Maguras use a VERY crude hydraulic system so scratched cylinders, mangled pistons and worn seals really don't make a huge amount of difference.

Edited May 2, 2010 by cant_ride