I have a Ditch Witch RT12. I am trying to tighten the chain. I can't get the jam nut loose to tighten the chain up. Ive never had any issues in the past. It has a very small window so tool choices are limited. Any recommendations?
You could try using a small wrench or a socket with a universal joint to reach the jam nut. Applying heat or penetrating oil may also help loosen it. If all else fails, consider taking it to a professional mechanic.