If you don't mind spending some money, you can get "Pocket Specs" for Lift Trucks. You can see these are www.equipmentwatch.com. It's basically a organized listing of manufacturer's specs. It's not bad, although a little expensive for what you get.

Depending on what it is that you want to do, dropping into a lift truck dealership can prove to be fairly beneficial as well. Most reps. would love to talk about their product against the competition.