DanP
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| posted on 1/1/06 at 03:21 PM |
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Problem fiiting new pads to sierra rear calipers..
Hi folks, happy new year to you all,
I'm hoping somone will be able to help me out, I'm putting the back brakes together on my luego viento and I can't seem to get the
pistons to retract far enough to fit the calipers around the new pads and discs.
I'm using standard sierra pads and discs an the total thickness of pads and disc is 36mm and yet the pistons won't go back any further
than about 34.5mm - any suggestions please?? (the calipers are only a year old) If anyone could measure how wide their calipers go or the total
thickness of the pads and discs that would be really appreciated as I'm totally flummuxxed!!
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Mr G
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| posted on 1/1/06 at 03:24 PM |
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I take it your rotating them and applying pressure as you do it?
Previous Post HERE
Cheers
G
[Edited on 1/1/06 by Mr G]
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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DanP
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| posted on 1/1/06 at 03:35 PM |
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Hi G,
I'm rotating them with the key from an angle grinder that fits nicely into the piston grooves, I am applying pressure as i rotate - not any
massive amoutn of force though.
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DanP
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| posted on 1/1/06 at 03:40 PM |
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Thanks for the link, i did do a search but obviously missed that one,
I will give it a go applying more force as i rotate the piston.
Cheers.
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Mr G
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| posted on 1/1/06 at 03:42 PM |
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As the other thread i've linked to - Best bet is to use a hand clamp or similar, you'll know when it 'bites' and starts
retracting, otherwise you'll be just rotating it forever 
[Edited on 1/1/06 by Mr G]
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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DanP
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| posted on 1/1/06 at 03:50 PM |
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Thanks, worked perfectly, i thought i had been applying enough pressure already as I had already made it retract but it obviously needs more for that
last bit.
Had to put it in a vice with a piece of wood as a sort of thrust washer to let me rotate the angle grinder key.
Much happier now! Thanks again! 
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billy
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| posted on 1/1/06 at 04:39 PM |
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cor i had some fun with mine nice new ones will turn in easy without force
luego-lo-cost finished,vauxhall 16v 2.0,twin 45s de-dion rear set up
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Genesis
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| posted on 2/1/06 at 11:46 AM |
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quote:
Originally posted by billy
cor i had some fun with mine nice new ones will turn in easy without force
But where's the FUN in that eh? ;P
Going fishin'
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britishtrident
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| posted on 2/1/06 at 11:52 AM |
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Applying too much pressure can ruin the self adjuster mechanism.
They should wind back with fairly gentle but firm pressure if they don't most likely the hand brake cable is too tight. Slacken off the cable
and check the levers on the calipers are fully back before starting to wind back the pistons.
Then when re-tensioning the cable ensure there is enough free motion to let the self.-adjusters work,
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