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| Author: | CompTruck [ Sat Mar 24, 2012 12:46 pm ] |
| Post subject: | sierra front brake locking on |
hi guys. my front left brake on my 1990 sierra is locking on. i have put new pads in recently then the car sat down side of house for about 2 months. when i drove it around the block it starts smoking from the brake and the brake is locked on. any ideas what the problem could be? thanks mates |
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| Author: | zooky08 [ Sat Mar 24, 2012 1:00 pm ] |
| Post subject: | Re: sierra front brake locking on |
Seized brake caliper maybe? |
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| Author: | CompTruck [ Sat Mar 24, 2012 1:08 pm ] |
| Post subject: | Re: sierra front brake locking on |
it moves freely on the actual calliper bits. is it possible for piston to sieze? whats the fix for that? |
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| Author: | zooky08 [ Sat Mar 24, 2012 1:21 pm ] |
| Post subject: | Re: sierra front brake locking on |
That's what I mean. The piston could be seized. Some times they get rust on the out side that stops them from sliding back in. Take caliper of the car, take shoes out and see if you can push the piston back in. If it doesn't slide in with ease, then you may have to take it apart to see what condition the piston and seals are in. |
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| Author: | want33s [ Sat Mar 24, 2012 1:23 pm ] |
| Post subject: | Re: sierra front brake locking on |
CompTruck wrote: it moves freely on the actual calliper bits. is it possible for piston to sieze? whats the fix for that? Seized caliper piston. Can't remember how many I've replaced or rebuilt on my white car. Rebuild kits are available on Ebay, quite cheap too. |
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| Author: | CompTruck [ Sat Mar 24, 2012 2:13 pm ] |
| Post subject: | Re: sierra front brake locking on |
good work guys. thanks |
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| Author: | CompTruck [ Mon Apr 09, 2012 10:17 pm ] |
| Post subject: | Re: sierra front brake locking on |
shud the piston be easy to push in and out normally once taken of the car? took mine off the car and put it in vice and been trying to smash the piston out from where the brake line connects but it just not coming out so i can rebuild it  its been soaking in a wd40 bath for 2 days now so hope its gunna come out |
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| Author: | fordem [ Tue Apr 10, 2012 12:26 am ] |
| Post subject: | Re: sierra front brake locking on |
They tend to be fairly tight - some caliper designs allow you to slide a pin punch through the line fitting and tap them out - others require compressed air - make sure your fingers are not in the way and put a block of wood where the rotor fits before pressurizing the caliper. |
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| Author: | want33s [ Tue Apr 10, 2012 12:53 am ] |
| Post subject: | Re: sierra front brake locking on |
If air won't pop the piston you may have to find a fitting to screw a grease gun to it and push it out with grease. |
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| Author: | bohuler [ Tue Apr 10, 2012 1:57 pm ] |
| Post subject: | Re: sierra front brake locking on |
The other way that I've used is to put the caliper back on the car, bleed the brakes and then push the pedal. Forces the piston out same as want33's grease idea 
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| Author: | CompTruck [ Wed Apr 11, 2012 6:49 pm ] |
| Post subject: | Re: sierra front brake locking on |
is there a article on installing the seal kit? looks like i gotta remove a inner ring inside the caliper that holds the piston seal in? |
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