Clutch is slipping badly on my L3130 it happened once before when I let someone borrow it and they moved some heavy clay soil it was taken to a tractor shop and they were able to adjust something and it has been working pretty good since then however my son moved some dirt again most likely riding the clutch again now slipping badly I adjusted the free play on clutch pedal to about 1.25 inches which I was told is what they did previously but to no success. I think I now need to replace clutch any suggestions and where can I find a PDF repair Manuel and procedure to change clutch any help would be appriciated