This factory service and repair manual for the 1989 Ford LTS8000 returns to a single configuration: the medium conventional straight truck in Base trim, powered by the 10.4L V8 diesel of 636 cubic inches. With one engine and one body style, the manual can be read straight through without first sorting out which variant a given specification belongs to. Engine, fuel, cooling, brake and electrical procedures are grouped by system, with torque values, wiring diagrams and diagnostics kept next to the work they support.
Engines covered
- 10.4L V8 (636 cu in) — diesel
Body styles covered
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1989 LTS8000. One recall is on federal record for this truck. It concerns the air check valves for the secondary service reservoir, which may not seat properly because of a mechanical interference between a circular brass guide and the wall of a cylindrical ferrule. No owner complaints are logged with NHTSA. Since the fault sits in the air brake supply circuit, the brake system procedures, specifications and diagnostics in this manual are the ones worth reading before a road test.
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
