This factory service and repair manual for the 1989 Ford FT900 covers a medium conventional straight truck offered with a choice of two turbocharged diesels: the 7.8L inline-six at 473 cubic inches and the smaller 6.6L inline-six at 401. Only a Base trim was listed. Where the two engines diverge, in displacement, injection settings, turbocharger hardware and cooling capacity, the book separates them, so the figures pulled off the page belong to the engine actually sitting in the frame rails.
Engines covered
- 7.8L inline-six (473 cu in) — turbocharged, diesel
- 6.6L inline-six (401 cu in) — turbocharged, diesel
Body styles covered
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1989 FT900. This model year carries no recalls on the federal record and no owner complaints with NHTSA. With no campaign history to work around, the manual is used the ordinary way: diagnosing and rebuilding whichever turbocharged inline-six is fitted, the 7.8L or the 6.6L, then working outward through the driveline, brakes, suspension and cab electrics of a medium conventional straight truck. Each of those systems has its own procedures, specifications, torque values, wiring diagrams and diagnostics.
