1991 Ford LN7000 Service and Repair Manual
This factory service and repair manual for the 1991 Ford LN7000 covers one engine, the turbocharged 6.6L inline-six diesel (401 cu in), in a short-conventional tractor or straight truck offered in Base trim only. With a single engine, the manual's procedures, specifications, torque values, wiring diagrams and diagnostics for the 6.6L are complete in one place, and the chassis sections separate the tractor from the straight truck where they differ.
Engines covered
- 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 1991 LN7000. Earlier LN7000 years listed a pair of turbocharged inline-sixes; this one shows the 6.6L alone, so there is one injection pump, one turbocharger and one set of valve clearances to learn, across a short-conventional tractor and a straight truck. The federal record holds neither a recall nor a complaint for the year. What is left is routine boost, fuel and air-brake service, which is what a vocational chassis actually consumes.
