It won't be an easy fix, the bar does not split. All gears slide out the gear box end. Krone is very good equipment and they are extremely proud of there parts, more so than most. I had one and 6 years back the cylinder kit was $190. So price what you need first and go from there. Had mine for 19 years and when all those things started going out it went to trade in. Also had a 281 that locked up like you described, you have metal or something in that bar so before you do anything drain the bar oil and look and go from there.