I'm Bob in Davenport Iowa across the ditch from Moline home of JDeere. I am having a good share of angst trying to negotiate this site and post to the correct forum. My new to me Deere X520 is scalping my lawn and I can not adjust the deck height. Is is so bad I am having to lift the deck and lock it in order to mow and this is't going to work. If anyone can help me or direct me to where I should ask this question I would be very grateful. I did visit a Deere forum, not sure now which as there sees to be very many forums, but the most recent post there was 6 months ago and I need help now ASAP.