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Post by jacknell on Jun 26, 2013 15:20:34 GMT 1
Trying to remove some pistons from my YPVS calipers diy style.... any advice in doing this.
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Post by crash on Jun 26, 2013 18:03:26 GMT 1
air line ,try and blow them out?
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Post by bare on Jun 26, 2013 18:42:33 GMT 1
Battery/cigarette lighter powered Air pumps work best as these Can generate 200+psi.
This IS dangerous though, as those pistons can be expelled with frightening force. Keep any biological bits you wish to keep..well clear.
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Post by jacknell on Jun 26, 2013 19:16:43 GMT 1
Sounds fun.....
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Post by Shytalk on Jun 26, 2013 19:21:24 GMT 1
Depends on the state of them really, you can just remove the pads and use the brakes as normal to pump them out, if they are on the bench you can use compressed air via compressor but as said its a potentially dangerous method, a safer alternative albeit messy is to connect a grease gun up to the bleed nipple, block the brake line hole with a bolt and pump grease into the caliper, its slow but safe.
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Post by ogri211 on Oct 21, 2013 12:54:34 GMT 1
I found a good way to get them out is if you get them half way using the lever with the pads out then when you strip them use a good quality jublee clip round the piston and lever it out with 2 screwdrivers
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Post by Ragger rd on Oct 21, 2013 16:59:37 GMT 1
Easiest way to do it if air does not work ,grease gun mate its easy straight on the nipple they come out easy done it loads of times
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Post by JonW on Oct 23, 2013 0:21:08 GMT 1
Fit a front master cylinder and line to them, bleed it and then heat the caliper with a heat gun, not mega hot, just a bit. Then pump em out. not dangerous and always works for me even on really nasty old calipers and when grease guns etc wont budge the pistons.
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Post by ogri211 on Oct 23, 2013 9:23:40 GMT 1
I like the one with the grease gun
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Post by Roofmonster on Oct 23, 2013 9:47:42 GMT 1
The grease gun method is the best and safest too. Grease is relatively cheap compared with loosing fingers ect.
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Post by AndyYam on Oct 23, 2013 13:40:16 GMT 1
Will definitely remember the grease gun method. Sounds good.
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Post by Shytalk on Oct 23, 2013 13:58:39 GMT 1
Will definitely remember the grease gun method. Sounds good. I did a rear caliper yesterday with a grease gun nice and steady and out they come, bit messy but easily cleaned up  |
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Post by reggieperrin on Oct 23, 2013 16:44:29 GMT 1
had a really, and I mean REALLY stuck piston in a caliper couple of weeks back. Clamped it to a board with enough clearance for the piston to pop out and connected it to a dive bottle at 300 bar. Got up to about 200 bar when it came out... Resulting 'pop' had the Mrs running out to the garage thinking I'd topped myself...  |
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Post by midlifecrisisrd on Oct 24, 2013 8:36:16 GMT 1
About to strip and re build the blue spots on my fazer so bit the bullet and went on the spend. Will no doubt pay for itself over the years. Internal bearing pullers, simply expand to grip the inner face.  A lot of tool for £64 delivered Steve |
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Post by muzz350 on Oct 25, 2013 11:16:20 GMT 1
I have just used the grease gun method on my front calipers and even though they were well stuck in it moved them with ease - a bit messy so on the 2nd one i filled with engine oil first then pumped in the grease and it was a lot easier to clean up the caliper but keep plenty of rags handy!
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