I'll try to keep this short. I have a 1981 345LDT. My front end loader has slowly been dropping off. I could make one pass around the field then I would have to bump the controls to lift it a bit. Eventually the hydraulics that rotate the bucket went out and I had to chain the bucket up so I could finish brush hogging. I took the hydraulics off to have them rebuilt. Mind you I could still lift the bucket before the overhaul just could not rotate the bucket. Once I reassembled the hydraulics I have now loss all control over the bucket. When I try to lift or rotate the bucket, I hear a hammering sound at the main line coming from the pump. I've tried to bleed the lines but my knowledge is limited and may not be doing it right lol. Any suggestions?