hey everyone. My first post here I just purchased an older model ski steer. (its actually a koehling scat track, but didnt see a category for them here.) I really just wanted to know what kind of general maintenance i need to do. I heard i need to greese the lift arms and pins ect..., what should i use? how often should i replace oil, filters, ect... What should i check and when. I dont have a manual and i have no idea on these things. any advice would be greatly appreciated. Thanks!!