Seized brake caliper pin

[Lukich]

My rear brakes are reaching their end of life, so I decided to install new ones.
However the caliper pin on which the pads are sliding is stuck big time. I didn't try to apply too much pressure to it to avoid breaking it, but I definitely applied more pressure to it then it should require to start turning. Do you guys have any tips on how I can loosen it? WD-40?

Thank you!
Luka

 

[ratsblast]

Hit them with a torch, might have some loctite on them. Be sure and use a good allen driver on a ratchet if it uses one. Sometimes hitting ratchet handle with deadblow will get it moving. Good luck.

 

[Slabhappy]

Tap tap tap on the pins to begin breaking up some of the corrosion, add liquid wrench.

 

[stangmx13]

use an impact driver, the manual kind that you hit with a hammer. it should come right out. do not use an electric impact.

 

[ST Guy]

What kind of head is on the pin? Hex socket? Slot for simple screwdriver? Be absolutely sure that whatever tool you're using fits perfectly and is high quality. If a hex driver, you might grind the end of the driver flat to get the best grip. If a regular screw driver, make sure the blade fills the slot completely both in thickness and width. Make sure the screw driver blade has the end ground flat with no rounding of any edges.

You might try heating the caliper up by riding around and using the rear brake. Have the tools ready when you ride home and stop. Don't let the caliper cool.

After you get it out, clean everything very thoroughly and then put a very light smear of moly on the screw threads before putting it all back together. It'll prevent future corrosion and seizure.

 

[Lukich]

Thank you, I will try to implement your recommendations and report back with results.

 

[kuksul08]

soak it in liquid wrench, tap on it a few times, should come right out.

 

[Busy Little Shop]

Begin your task after the caliper is hot from a ride... cold caliper equals more
pressure is required to break free... first try to twist pin next try tapping it
free... don't hit it hard enough where the metal mushrooms...

 

[ST Guy]

I should add that when I put moly on threads, I simply use a small artist's paint brush, dip it in the high moly content paste and then brush the threads, making sure that every surface of the thread receives a little moly.

 

[Lukich]

Thank you all for your comments, getting the caliper hot from usage + a little lube did the trick.

 

[ST Guy]

Excellent!

 

[zammer]

This is why copper slip / anti seize or even a little moly grease as ST guy said above is smart - avoid stripping out those pins.