Aluminum Piston Stuck on Champion R-14
I am rebuilding an older Champion R-14, a project which was going swimmingly until I attempted to remove the head to replace piston rings.
The smaller piston slipped right out without difficulty, however the large piston withdrew only half of the way from the cylinder and then froze.
The piston is loose in the manner wherein I can turn the head fairly easily and it will rotate around the piston, but once the piston withdraws to that halfway point it freezes.
The cylinder for the large piston was pretty dirty as if oil was blowing by a bad ring. Sure enough, when I went to remove that large piston, pieces of broken ring fell out.
I'd appreciate your help and advice if you are familiar with this problem and a solution.
I just successfully repaired and rebuilt the 5 HP 230 volt 100-pound Centurion electric motor attached to the compressor, a task of some complexity and one that had me thinking that rebuilding the compressor itself would be a quick and easy task.
Thank you for your help,