Found an excellent US Army repair manual on the 6.2-6.5L diesel engines that can be downloaded free online. Its 271 pages in pdf format and contains some of the best illustrations of engine components I've found anywhere. Even includes detailed instructions on teardown and repair of the fuel injection pump. All you need is the Adobe Acrobat reader to view it.
Click on link below:
http://www.skylab.org/~zetan/van/9-2815-237-34.pdf
Click on link below:
http://www.skylab.org/~zetan/van/9-2815-237-34.pdf