As Lady F... noted, viewing pdf manuals on readers can be problematic. I've pretty much downloaded most manuals for my products as soon as I buy them. But I've copied about 3 to my kindle 3 and they are not easy to view. Some are not standard notebook paper size and I have to windup zooming and scrolling to see the pages - not easy to actually read through.
But give it a go if you can find the manuals you need.