1991 Ford FT900 Service and Repair Manual
This factory service and repair manual for the 1991 Ford FT900 documents the medium conventional chassis in both forms it was sold in that year, a tractor truck and a straight truck, each powered by the turbocharged 7.8L inline-six diesel and each listed under a single Base trim. One engine across two duty cycles means the engine section serves both, while the frame, brake and driveline chapters carry whatever differs between pulling a trailer and carrying a mounted body.
Engines covered
- 7.8L inline-six (473 cu in) — turbocharged, diesel
Body styles covered
- Tractor truck, medium conventional
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1991 FT900. Federal records show no recalls for this model year and no owner complaints with NHTSA. In practice that means the manual is opened for maintenance and repair rather than remedy work: injection and turbocharger service on the 7.8L inline-six, cooling system specifications, clutch and transmission procedures, foundation brake work on either the tractor or the straight truck, and the wiring diagrams and diagnostics for the medium conventional cab.
