This factory service and repair manual for the 1989 Ford LNT8000 covers the short-conventional straight truck, in Base trim, with the 10.4L V8 diesel (636 cu in) as its only engine. The single engine and single body style mean the manual's specifications and torque values all belong to the 636 cu in V8, and the procedures, wiring diagrams and diagnostics all belong to this straight-truck chassis. For a truck of this year the air brake system deserves particular attention, and the manual's brake procedures cover it.
Engines covered
- 10.4L V8 (636 cu in) — diesel
Body styles covered
- Straight truck, short conventional
Trims covered
- Base
Known issues on the 1989 LNT8000. One recall is on federal record for the 1989 LNT8000, concerning air check valves in the secondary service reservoir that may not seat properly because of mechanical interference between a circular brass guide and the wall of a cylindrical ferrule. NHTSA has no owner complaints logged for it. The manual's air brake procedures, specifications and diagnostics cover that reservoir and check valve hardware, and its coverage of the 10.4L V8 diesel handles the engine side.
SECONDARY SERVICE RESERVOIR AIR CHECK VALVES MAY NOT SEAT PROPERLY DUE TO A MECHANICAL INTERFERENCE CONDITION BETWEEN A CIRCULAR BRASS GUIDE AND THE WALL OF A CYLINDRICAL FERRULE I
