John Deere X500 snow blade adjustment

I just installed a used 48" front blade with manual angling kit on an X500. It raises and lowers fine but when lowered the blade is still about 1 1/5" off the ground. There are two wheels on the blade frame that contact the ground and so far I cannot figure out what to adjust so the blade is lowered. I have tried changing the inner and outer lift assemby but that doesn't help. I would appreciate any suggestions.