1990 Ford LT9000 Service and Repair Manual
This factory service and repair manual for the 1990 Ford LT9000 covers five diesels and three body styles. The engines are the 10.5L six-cylinder (638 cu in), the turbocharged 10.0L inline-six (611 cu in), the turbocharged 14.0L inline-six (855 cu in), the turbocharged 14.6L inline-six (893 cu in) and a newly listed 10.3L six-cylinder (629 cu in). The chassis comes as a medium-conventional tractor truck, a low-tilt tractor truck or a medium-conventional straight truck, all in Base trim. Five engines across three chassis give the year's procedures, specifications, torque values, wiring diagrams and diagnostics a wider spread than the year before.
Engines covered
- 10.5L six-cylinder (638 cu in) — diesel
- 10.0L inline-six (611 cu in) — turbocharged, diesel
- 14.0L inline-six (855 cu in) — turbocharged, diesel
- 14.6L inline-six (893 cu in) — turbocharged, diesel
- 10.3L six-cylinder (629 cu in) — diesel
Body styles covered
- Tractor truck, medium conventional
- Tractor truck, low tilt
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1990 LT9000. The federal record for the 1990 LT9000 holds one recall and no owner complaints. The recall concerns the secondary service reservoir in the air brake system, where the air check valves may not seat properly owing to mechanical interference between a brass guide and the ferrule wall. NHTSA has nothing logged from owners. For the air system and the five diesels alike, the manual's procedures, specifications, torque values, wiring diagrams and diagnostics are the reference, including the low-tilt tractor cab that returns to the list this year.
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
