Free library of truck workshop manuals, service bulletins, wiring diagrams and fault code guides — Volvo, Cummins, Detroit, ISUZU, HINO and more.
The first documents are being added this week. Browse all published documents in the Manuals archive.
What the truck workshop manuals library includes
Every document is an original OEM publication: step-by-step repair procedures, torque specifications, wiring diagrams, diagnostic trouble code descriptions and service bulletins. The truck workshop manuals cover Volvo, Cummins, Detroit Diesel, ISUZU, HINO, PACCAR and other heavy-duty engine families, and each entry names the exact publication it comes from, so you can verify it against the manufacturer’s own catalogue such as Cummins QuickServe.
How to use the library
Open any document to read a free preview of its first pages together with a short technical summary. Creating a free account unlocks the full PDF download. If a repair turns out to need more than a manual, the diagnostic software shop carries the dealer-level tools for the same engines, and the delivery page explains how remote installation works after purchase.
The collection is being published in stages; new documents are added every day, so a bulletin that is missing this week is usually available the next. Bookmark this page or check the archive linked above to see what is new.
Which brands are covered today
Volvo and Cummins currently hold the largest share of the library, from valve adjustment procedures on D11, D13 and D16 engines to ISX fault code references and aftertreatment repair guides. Detroit Diesel coverage centres on the DD13, DD15 and DD16 series together with the older Series 60, while the ISUZU and HINO sections collect the workshop documentation that is hardest to find elsewhere in English. Electrical troubleshooting is a library of its own: complete wiring diagram sets, connector views and pin assignments organised by model year, plus the service bulletins that document factory-acknowledged faults and their approved corrections. If your fleet runs a brand that is still thin here, tell us — publishing priority follows what workshops actually request.
