NC30 rear disc removing question.

[xivlia]

hmm probably need to use the mole grips. i dont have a compressor, i tried to move it with some pliers with a tower round it and it wouldnt move but it also didnt damage the piston. maybe i could do the same with the mole grips.

[xivlia]

Instead of buying a set of mole grips why dont you buy the proper tool and remove it without damaging it???

OH YEAH!, i forgot about that, but i cant remember whats it was called. someone posted it here somewhere.....

[Drunkn Munky]

Ive got got one thats not meant to be a piston removing tool but it does the same job and was dead cheap off ebay. I couldnt even tell you what its meant to be but i'll grab a picture of it later, looks a but like a pair of scissors with blunt ends that go inside the piston then you wind them out till it grips. Ive never had a piston defeat me yet and ive overhauled some rotters with em.

[xivlia]

oh okay, thanks. one thing i was watching a video on youtube and a guy manages to remove brake piston with a 12v tyre compressor. my dad has one of this, i might put the piston back in and try again to see if it will work.

[ScottieDucati]

Something like this? http://www.amazon.com/BikeMaster-Brake- ... ton+puller?

[Drunkn Munky]

Something like this? http://www.amazon.com/BikeMaster-Brake- ... ton+puller?

That not the one i have, mine was only about £6 and has lasted more years than i can remember.

[xivlia]

pictures of the seals

[NGneer]

Ersan - between your seized piston and narly seals....I think you have found at least found your problem. Genuinely, well done, that is the first step....

Now to fix it - properly without buggering things up is the next one.

I too have seen the video on you tube, but buy the sounds of how well stuck your piston is, I dont' think that would solve your problem this time. As you have you caliper off (and mobile) I would be tempted to take it down to your local garage where they will have some sort of piston removal tool, either the piston pliers already linked to or some more heavy weight sort of tool like this (http://www.ebay.co.uk/itm/Motorcycle-Br ... vi-content).

I would go along with a smile, a pretty please and maybe a couple of beers to help grease the wheels, and I am sure they will pop that piston out in seconds without damaging the piston or the caliper. Well done getting as far as you have, but having to ask for help from proffesionals is not a failure - it is just good sense sometimes and we all do it.

Get that sucker out and crack on with carefuly cleaning up the calipers (and YES you do need new seals).

I still belive ......

[xivlia]

thanks, yeah i think i can take it down to them, but they might be shut for christmas now. do you think i can still use this piston though? it has minor pitting, it doesnt seem rough when i touch it with my fingers etc.

[NGneer]

thanks, yeah i think i can take it down to them, but they might be shut for christmas now. do you think i can still use this piston though? it has minor pitting, it doesnt seem rough when i touch it with my fingers etc.

I am sure somewhere will be open tomorrow - it is only the 21st after all and I reckon you would be in and out in 5 minutes.

As for using your piston it is hard to tell from the pictures. Give it a good clean but not with anything too abrasive. Green scotchbrite that has already been used a bit is ok (new stuff can be a bit course), nail brush, old tooth brush, and something like a cable tie to pick away at any stubourn stuff but not sand paper / screwdriver or anything that will scratch the surface. It will take a bit of elbow grease, but with a bit of effort and patience I bet you will be suprised at how well they clean up.

If after giving them a proper clean you still think they have pitted surfaces which are bad enough to damage the seals as the piston slides past, then change them - if not then re-use them. Don't rush to spend money you may not need to as the bike will claim that quick enough anyway