I believe I have my owners manual for my SB 14. It is not in my office, but I will check later in my garage. Send me your address or better yet fax # to my email, and I will send it to you. Bill bbbbaddad@yahoo.com

The Gt and Gx tractors of the late 90's to mid 2000's were built better than the new 500 series. The new 500 series tractors use the same frame as the 300 series tractors. They also have much more bolt together pieces on the frame. The frame of the gx255 is all welded. The gx255 is the same tractor as a gt245 but with power steering, a diff. lock and a better transmission(k71c), which has a replaceable transmission filter and bigger charge pump. It uses the same transmission as the gx 335 and 345 tractors use. The price of 5500 is high, but with 60 hours of use it is barely broke in. I would deal on this tractor before I would buy a new 500 series. If I would buy new, it would be a 700 series.

Here's online parts look-up anyways. Deere also has a link to service manuals, but just to order them. Google? What kind of issue are you having? Here is a link that might be useful: deere parts

Let me start by saying I do not have the 165 but have the JD LT 155 with the 38" deck. I had the tractor for years before I worked up the courage to remove the deck, thinking that I was going to have to re level it and while simple re leveling anything never turns out simple. On the LT155 there are three points where the deck is attached to the tractor, and one control rod connection. First disconnect the control rod, It is held to the deck by a simple cotter pin. It can be accessed from the back of the deck. I place some three-wheeled furniture dollies under the deck and lowered it on to them. There are two pins with cotter pins at the rear of the deck that go through a fitting on the tractor. Remove the pins from both the fittings on both side of the deck. Now with both pins out and the control rod disconnected move the deck forward until the rod at the front of the deck is free of the "U" fitting on the deck. you may have to lift the deck slightly or use a little force to align the rod connecting the deck to the tractor so it will slip out of the fittings. Since you are not messing with any of the adjuster nuts, the deck will go back the same way you took it off and no leveling adjustments need be made. It almost takes longer to write this than it takes to remove the deck.