Mitchell's Mausers has a decent manual for PMCS. I highly recommend you do NOT buy from them. Their rifles are M48's, which are post-war Yugoslavian rifles built on German tooling. For the price they charge, you can get an authentic German Mauser.
Bob Tuley's website has step by step photos for cleaning and disassembly. His website came in handy when I couldn't figure out how the bolt went back together.
Be careful using surplus ammo. It's fine for plinking and general rifle practice. Since surplus ammo is FMJ ball, it's generally not legal for hunting. If you do shoot surplus ammo, be aware that the primers in the cartridges are usually corrosive. You'll need to neutralize it right after you're done shooting. A spritz of ammonia based glass cleaner does the trick.
It's great that many pdf's are out there for such a wide variety of firearms. In the past I had to buy manuals at gun shows. A few years ago, an online friend sent a pdf on the FAL, thus enabling me to totally take apart, clean, and assemble everything (namely the gas system). Rifle fires and functions beautifully.
