Topic: CB500/550 caliper...stuck pad

[Scott S]

 I have two calipers in my parts stash, one from a CB500 and one from a CB550.
 I can't assess the shape of the piston because I can't get the pads out of either one! I've tried soaking them with PB Blaster and using my air compressor. Tried hitting them back into the calipet with a hammer and hitting the back of the caliper with a dead blow hammer.

 Am I missing something or are these things just junk? If I pried on the pad or maybe screwed a bolt into it so I could have something to pull on, would that work/hurt anything?
 If they're that stuck, are they likely non-rebuildable. What about that rolled pin looking thing? Does it need to come out first? If I destroy it, is it replaceable?

[fayettebr]

Try a grease gun connected to your bleeder. It might be possible it will apply more psi than your compressor.
GL

[Scott S]

 Can I do that with the hard line off the caliper? Wouldn't it just come out where the brake line screws in?

[fayettebr]

I had my caliper off the bike and put a bolt where the brake line connects and plugged it off. The grease gun fit perfectly on the bleeder.

[LesterPiglet]

Why not split the caliper seeing it's off already?

[seanbarney41]

hook it up to master cylinder, bleed brakes as normal...and squeeze that piston, pad and all out with the brake handle...

[Scott S]

 The caliper is split already. I can't get the pad that goes on the piston side out of either caliper.

 One came from my '71 that sat in a barn for 28 years. The other came from a junkyard bike that's been out in the weather for years.

 I'm trying to get the brake pad out so I can attempt to get the piston out and determine if either caliper is rebuildable.
 How can I get the pad off the piston so I can THEN see what needs to be done?

[LesterPiglet]

Oops. Try soaking in diesel or brake fluid overnight. If the piston side doesn't come out with fluid pressure then the piston is bound to be siezed as well so you can't do anymore harm by drilling a hole through the centre. Obviously you will need to replace the piston.