On the Truckmanualshub.Com, you can find a lot of many truck repair manuals, fault codes lists.
Choose your machinery/trucks/forklifts brands:
Allison Transmission, Astra , Austin, Avia
BAW, Beifang Benchi, Berliet, Bobcat
Case, Caterpillar, Challenger, Claas, Crown, Cummins
Daewoo, DAF, Detriot Desiel, Deutz, Dodge, Dongfeng, Doosan
FAW, FENDT, FiatAgri, Ford, Fordson, Foton, Freightliner
Jac, JCB, John Deere, Jungheinrich
Kalmar, Kenworth, KIA, Komatsu
Mack, MAN, Massey Ferguson, Mercedes-Benz, Mitsubishi