Got a new 1635 with backhoe and loader 5 weeks ago, and all has worked well, until two days ago when I disconnected the backhoe for the first time, with no trouble (with manual in hand, though.) Then followed backhoe manual instructions and connected rear hydraulics pressure line (only hose of the 3 with a male tip) to the rightmost of the two couplers on the bracket. This is supposed to provide hydraulics to the 3 point hitch, but didn't. After a lot of head scratching and reconnecting this connection, took it back to dealer. Soon determined the center hose and the left hose were reversed, as well as the right hose being longer than specified--it had been used in place of one of the other two hoses. Apparently came from the factory this way. Dealer quickly corrected all this and now everything is great. Not sure how backhoe worked with the original setup, but I'm ignorant about hydraulics.