I have a model 919.165300 with a broken piston. I can get a piston kit for about $40, and that's all I have invested in the compressor. My problem is that I don't have a manual or schematic, and can't find one. I wanted to make sure what ever parts need to come off, will come off, and that I can handle this. I am and electrician and very handy. Any ideas out there, or would you scrap it?