Full factory repair manuals — characteristics, adjustments, and checks for keeping a D-series roadworthy. 1 manual available: 814 Repair Manual, Volume I.

Parts identification and ordering references. 3 catalogues available: 604, and 598 Volumes I & II.

Focused technical bulletins and single-topic reference manuals — hydraulics, electrics, and similar. 1 manual available: 844 Hydraulics Course Notes.