i have a 2003 tracker I replaced the brake shoes on the front passenger side the inside brake shoe was worn all the way down to th metal and the piston was hard to push back into the caliper bore. trying to loosenup the piston I pushed it in and out of the caliper now I cannot get it to push back in. Did I do something wrong? can anyone help with this problem I am not a pro mechanic most of what I do is fairly basic stuff. Thanks.

Usually it's the caliper.

The way you tell is to open the bleeder and then try to push it in.  If it still doesn't push in, or is still really hard to push in compared to the good side, caliper is toast.  Time to go get a new or remanufactured one.

If you open the bleeder and it pushes in really easy, and fluid squirts all over the place out of the bleeder as you push it in, it means that, well it ISN'T the caliper.  So now you gotta go look for the blockage. Next culprit is usually the rubber brake hose right at the caliper, or if you have ABS maybe something happened in the ABS module... etc

James

Caliper or Brake hose
Rebuild the caliper or replace it change the brake hose......
rember what you do to one side you must do to the other