1990 Ford LN7000 Service and Repair Manual
This factory service and repair manual for the 1990 Ford LN7000 covers the turbocharged 7.8L inline-six diesel (473 cu in) and the turbocharged 6.6L inline-six diesel (401 cu in) in a short-conventional tractor or straight truck, with Base the only trim. The manual's procedures, specifications, torque values, wiring diagrams and diagnostics are set out for both engines and both chassis, so whichever combination was ordered is covered.
Engines covered
- 7.8L inline-six (473 cu in) — turbocharged, diesel
- 6.6L inline-six (401 cu in) — turbocharged, diesel
Body styles covered
- Tractor truck, short conventional
- Straight truck, short conventional
Trims covered
- Base
Known issues on the 1990 LN7000. One recall stands on the 1990 LN7000's record: secondary service reservoir air check valves may fail to seat because a brass guide interferes with the wall of a cylindrical ferrule. Owners have lodged nothing with NHTSA about this truck. With the air brake supply circuit the only flagged area, the manual's procedures, specifications and diagnostics for the air system, with torque values for its fittings, are the section that recall points to.
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
