This factory service and repair manual for the 1989 Ford LS8000 covers the 10.4L V8 diesel (636 cu in) in the medium-conventional straight truck, in Base trim. Nothing else is listed for the year, so the manual's specifications and torque values all apply to the 636 cu in V8 and its procedures, wiring diagrams and diagnostics all apply to the one straight-truck chassis. The air brake system is the area the federal record singles out for this year, and the manual's brake procedures and specifications cover it.
Engines covered
- 10.4L V8 (636 cu in) — diesel
Body styles covered
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1989 LS8000. Just one recall appears against the 1989 LS8000, and it sits in the air brake system. It concerns the air check valves in the secondary service reservoir of the air brake system, which may not seat properly because of a mechanical interference between a circular brass guide and the wall of a cylindrical ferrule. NHTSA has logged no owner complaints for this truck. The manual's air brake procedures, specifications and diagnostics cover the reservoir and check valve hardware in question, and its engine coverage handles the 10.4L V8 diesel.
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
