Hi all.
I have the same model (L1500DT). I've found that it's a cross between an L175 and L185DT. Best explanation I can give is if an L175DT was made, that would be a direct cross other than PTO speeds. If you get operation manuals for the 175 it will tell you pretty much everything. The 185DT will fill you in about the 4x4 operation. When I look up parts, I use the 175 breakdown. All parts (again, with exception to the 4x4 system) are interchangeable. I've done a lot of work to my machine and would be happy to share what's I've learned. Send me a message with any questions or continue this thread.
Joel