2021 Ford F-350 Super Duty Service and Repair Manual

This factory service and repair manual for the 2021 Ford F-350 Super Duty is built for three engines, the turbocharged 6.7L diesel V8, the 7.3L gasoline V8 and the 6.2L flex-fuel V8, in five bodies and seven trims. A truck sold as both a Limited crew cab and a bare cab and chassis needs one reference that covers both, and this one does it by system, with procedures, specifications, torque values, wiring diagrams and diagnostics under each heading.

Engines covered

• 6.7L V8 (406 cu in) — OHV, turbocharged, diesel
• 7.3L V8 (445 cu in) — OHV, naturally aspirated, gasoline
• 6.2L V8 (379 cu in) — SOHC, naturally aspirated, flex-fuel

Body styles covered

• 4-door crew cab pickup
• 4-door extended cab pickup
• 2-door cab & chassis
• 4-door cab & chassis
• 2-door standard cab pickup

Trims covered

• King Ranch
• Lariat
• Limited
• Platinum
• XL
• XL Plus
• XLT

Known issues on the 2021 F-350 Super Duty. Eight recalls are recorded federally against this model year. One concerns a void in the underhood secondary fuel line on 6.7L diesel trucks, where a leak near an ignition source raises the risk of fire. Another concerns front wheel hub extenders that may not have been attached properly to the rotor hub assemblies, risking a detached wheel. A cracked fifth wheel mounting bracket and wiper arms that could break also appear. Four complaints have been filed with NHTSA, all on fuel and propulsion.