hayes piston swap without compressed air?

nwmlarge
Posts: 778
it says in the hayes instructions to remove the old piston by forcing it out with compressed air.
i don't have any is there another solution ?
i don't have any is there another solution ?
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leave it all connected and use the lever to pump it out.
not as easy but if you get them both most of the way out and then split the caliper (you dont say which caliper it is) you can then pull them out."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
nwmlarge wrote:it says in the hayes instructions to remove the old piston by forcing it out with compressed air.
i don't have any is there another solution ?
Do you know anyone who does? Do you have a friendly local garage? If not dismantle the caliper from the hose, clean it as best you can then post it to me and I'll do it for you...0 -
doh having a blonde moment i guess a garage would do lol!
they are hfx 9 g2's in grey.
i tried pumping the lever but i'd already split them by that point so there isn't enough fluid in the system.0 -
also is this what i need if i want to shorten the hose?
would i have to use a different one for a goodrich hose ?0 -
I've used my track pump to force a piston out of my hope caliper.
But if you're only shortening the hose, it is not necessary!0 -
I was replacing the piston when I was doing this and just pulled it out with pliers in the end (does take a bit of grunt though
). But as above you don't need to do that (or even take the caliper apart) if just shortening the hose.
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sorry i meant to link to a compression bushing at that point. http://www.chainreactioncycles.com/Mode ... delID=7479
i thought when in rome i may as well do a couple of jobs at the same time.
i have to replace one piston as i managed to break the pin off in the middle of one of them.
i'll try blasting it with a car tyre pump later and hopefully that will blast it out.0 -
If you use one of those plastic adaptors that you'd use to blow up a lilo etc, you can jam it into the calliper without damaging it and give the pump a good press.0
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cool i thought that may be worth a look.0
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i tried all the pumps i had indoors and got nowhere with it.
took it to a garage and got them to blast the pistons out with some air. took a fair bit of tricking about to get them both out.
definately not a job you can do at home without a seriously decent compressor!
still looking forward to rebuilding the caliper now!0