1991 Ford LTS9000 Service and Repair Manual
This factory service and repair manual for the 1991 Ford LTS9000 lists five diesels for the medium conventional tractor and straight truck in Base trim: the unturbocharged 10.5L and 10.3L six-cylinders and the turbocharged 10.0L, 14.0L and 14.6L inline-sixes. Three of those five sit within half a liter of one another, so what separates them shows up in the details rather than in the headline displacement. The manual keeps each engine's clearances, torque values, wiring diagrams and diagnostics on their own.
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
- Straight truck, medium conventional
Trims covered
- Base
Known issues on the 1991 LTS9000. No recalls are recorded for the 1991 LTS9000 and no owner complaints have been logged with NHTSA. The manual's usefulness accordingly rests on its service content rather than on any remedy: injection and fuel supply procedures for five diesels, turbocharger and charge-air checks on the three boosted inline-sixes, cooling and lubrication specifications, torque values for engine work, and wiring diagrams paired with the diagnostics.
