Hi,
Found this great website recently with lots of U.S. military manuals online there seems to be just about everything available.
Here are a few examples, Repair Manuals, Training Courses, Army Training, Automotive Training, Army Aviation, Construction Manuals, Diving Instruction, Drafting, Instruction Manuals, Electronics, Engineering, Meteorology, Military Training, Photography
Due to the fact that it is actually a pay site the manuals are only available to view online one page at a time but there is a next button which makes it easy to flick through the pages.
Take a look and let me know what you think and if you find something useful.
Regards,
Uncle Bodwin
http://www.tpub.com/