1991 Ford LTA9000 Service and Repair Manual
This factory service and repair manual for the 1991 Ford LTA9000 covers seven diesels and an unusual pairing of body styles: the medium-conventional tractor truck and a low-tilt straight truck, both Base trim. The turbocharged, aftercooled 12.7L inline-six (774 cu in) is the year's addition, joining the 10.5L six-cylinder (638 cu in), the turbocharged 10.0L, 14.0L and 14.6L inline-sixes (611, 855 and 893 cu in), the 10.3L six-cylinder (629 cu in) and the turbocharged, aftercooled 11.1L inline-six (677 cu in). The 1991 procedures, specifications, torque values, wiring diagrams and diagnostics therefore have to span a conventional tractor and a tilt-cab straight truck as well as seven engines.
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
- 11.1L inline-six (677 cu in) — turbocharged, aftercooled, diesel
- 12.7L inline-six (774 cu in) — turbocharged, aftercooled, diesel
Body styles covered
- Tractor truck, medium conventional
- Straight truck, low tilt
Trims covered
- Base
Known issues on the 1991 LTA9000. No recalls are on federal record for the 1991 LTA9000, and NHTSA has no owner complaints logged against it. The manual's procedures, specifications, torque values, wiring diagrams and diagnostics stand as general reference for the seven diesels, including the two aftercooled engines, the 11.1L and 12.7L, and for both the medium-conventional tractor and the low-tilt straight truck.
