Cub Cadet LTX 1050 won,t charge battery,quit running

I have a 2010 Cub Cadet LTX 1050 with the Kawasaki FR651V-ASO8 motor that quit running.It worked fine when I put it in storage last fall,but when I started it up this summer the electric pto clutch was making grinding noise and battery wouldn't charge.Replaced pto clutch,stator, regulator,battery,checked the fuse.The key safety switch,used when backing up during mowing, still doesn't work,you can back up while mowing and it won't shut deck off.Been charging battery and mowing yard while trying to figure out the problem.Now the tractor just quit in middle of mowing and won't start.Has spark and gas to carb.Any help with these issues?