DYT 400 - need help!

I have a Craftsman with a 42 inch deck and it is about 9 years old+/- and I just noticed it leans to ons side, considerably. If I measure the deck to the gound on both sides there is a diferenc eof over an inch and the mower cuts like crap.

Is there some way to adjust the chassis ? (tire pressure is correct)

Thanks