New owner of a 450e long track help

[Charlesray]

First wanted to say thank you for letting me join the message board! I recently purchased a 450e long track for cheap (It needed an injection pump). Cleaned fuel system and threw a pump on and runs great! Next I plan to change all filters and fluids but this is my first time owning a dozer so I’m wondering if there’s anything else I should look for or do. Any maintenance tips and tricks would be greatly appreciated or any preventative maintenance I need to do? Any and all suggestions would be greatly appreciated! The hour meter on the machine reads 3600hrs for what that’s worth. I also have the Manuals for the machine. Thank you guys!