This factory service and repair manual for the 1987 Ford LT8000 narrows to one combination, the 10.4L V8 diesel of 636 cu in in a medium-conventional straight truck, Base trim. There is no engine option to check and no second body style to cross-reference, so lookups are direct: the engine specifications and torque values printed are the ones that apply, and the wiring diagrams describe the only electrical layout the truck was built with. Diagnostics follow the same single path through each system.
Engines covered
- 10.4L V8 (636 cu in) — diesel
Body styles covered
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1987 LT8000. The federal record carries no recalls for this truck and no owner complaints logged with NHTSA. With nothing to remedy, the manual serves as the reference for keeping it running, through engine and fuel system procedures for the 636 cu in V8 diesel, cooling and lubrication specifications, air brake testing and adjustment, driveline torque values, and wiring diagrams paired with the diagnostics for the straight-truck electrical system.
