Rear Caliper Help

[iDemonix]

DSS are out of pads so it'll have to be an eBay jobby, looks like I'll be riding around padless for a few days - work is only a 10 minute ride though and there's no fucker about at 6am, just have to ride back carefully at 1pm!

Yeah, my only problem now is getting the pistons back in - tried with my thumbs to no avail, tried with a screwdriver with the end of the screwdriver in the holes where the pads go, levering them in - but they won't budge :/

[Deviant400]

order some new seals , as the caliper is low down it gets all the crap and salt and shit over time and the seaze bad , the seals get stiff and brittle and are not as supple so the pistions dont return so the brake binds all the time ,
seals ar not that expensive and its worth doing

[mattUKNC]

Try and use a vice to hold the caliper and apply pressure to slowly push them back, they should move eventually. I think I might have a set of pads too, if I do, I'll throw them in.

[iDemonix]

I've just ordered a set of pads Mat, don't worry about it :) I think I'm going to mount the caliper with no pads (I already hear you all calling me an idiot) and ride it as little as possible. I'll sort a lift for the weekend shifts but come monday I'll have to go padless!

As for the back wheel, sound advice about leaning on the stand, managed to lean it over, cock the back wheel and spin it with my foot! It spins fairly easily but still not freely, it's fine for now.

I think I'm going to order a new set of seals too, hopefully the pads, spring and seals should all arrive soon then I'll pop the pistons out by pressing on the rear brake, old seals out, new seals in, pistons should go in easier (I'll cover them in brake fluid to help them on their way) then new spring + pads in. Sounds so easy lol.

Will I need to bleed the system after? I've never bled brakes before so I'll have to look up a guide, don't even know what's involved or why it's done (something to do with air in the fluid?)

[CMSMJ1]

back brakes are overrated anyways... I rode with no caliper on my bike for months. Just don't bother with it.

you'll have to bleed it for sure so get your ballache device set to KILL...it is a pain.

[iDemonix]

Yeah I never bother with mine, I've only ever used it once in an emergency when a lorry pulled out after staring at me coming towards him doing 60mph for a good 10 seconds... gave it a good stomping on then.

So long as the pistons can't travel far enough to fall out, but with the disc in the way and me not pressing the lever they shouldn't go anywhere anytime soon. Just hoping that once I get the pistons out and new seals in, they go back in nicely.

So do I need any specific tools to bleed a brake?

[amorti]

You'll need to give it a good clean. Pump the pistons out, clean, retract, pump out again and repeat. If after the third or forth attempt you can't push the pistons back with thumb pressure alone then it wants rebuilding.

Should be at least this clean... (t595 caliper)

[iDemonix]

Do you mean remove the pistons, then put them back in etc? How do you get them back in if thumb pressure isn't enough? Screwdriver + leverage?

Just bought these;

http://cgi.ebay.co.uk/RR-Caliper-seal-S ... 1379wt_907

[Deviant400]

if you bought seals , just get the pistons out and clean them up (dont score or scratch them ) fit the new seals and they will slide in with no effort at all ,

[iDemonix]

I'll wait till the seals arrive and then give the pistons a polish.

From what I understand about brake bleeding, I just need to attach a clear piece of tubing to the bleed nipple (after unscrewing it) and keep pumping the brake (and pushing the pistons back in) until all the liquid in the pipe has no bubbles. And keep the reservoir topped up. Although, could I not just run the clear pipe back in to the reservoir so it tops itself back up?