2021 Ford F-550 Super Duty Service and Repair Manual
This factory service and repair manual for the 2021 Ford F-550 Super Duty covers two overhead valve V8s, the turbocharged 6.7L diesel of 406 cubic inches and the naturally aspirated 7.3L gasoline engine of 445 cubic inches, in a chassis cab built as a four-door crew cab, a two-door conventional cab or a four-door extended cab. Three trims are listed: XL, XLT and Lariat. The diesel fuel system features heavily in this year's record, and the procedures, specifications, torque values, wiring diagrams and diagnostics for the 6.7L fuel filtration and high pressure pump, together with the wheel hub and wiper coverage, are the parts of the book that matter most.
Engines covered
- 6.7L V8 (406 cu in) — OHV, turbocharged, diesel
- 7.3L V8 (445 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 4-door cab & chassis, crew cab
- 2-door cab & chassis, conventional
- 4-door cab & chassis, extended cab
Trims covered
- Lariat
- XL
- XLT
Known issues on the 2021 F-550 Super Duty. Eight recalls are on federal record for 2021, several on the diesel fuel system: a void in the secondary fuel filter cap can grow into a leak, and biodiesel deposits on the high pressure fuel pump rollers can lead to pump failure. Front wheel hub extenders may also be improperly attached, risking wheel separation. Owners have logged 12 complaints with NHTSA, nine on the fuel system and one each on the power train and steering. The manual's diesel fuel system procedures and specifications, and its wheel hub torque values, cover those items.
Ford Motor Company (Ford) is recalling certain 2021 F-150 and 2020-2021 F-250, F-350, F-450, and F-550 Super Duty vehicles. During manufacturing, the windshield may not have been properly bonded to t
Ford Motor Company (Ford) is recalling certain 2021 Super Duty F-250, F-350, F-450, F-550, F-600, and Medium Duty F-650 and F-750 vehicles equipped with 6.7L diesel engines. A small void may be prese
Ford Motor Company (Ford) is recalling certain 2021 F-350, F-450, F-550, and F-600 vehicles equipped with dual rear wheels and front wheel hub extenders. The front wheel hub extenders may be improperl
Ford Motor Company (Ford) is recalling certain 2020-2021 F-150, Expedition, 2020-2022 Super Duty F-250, F-350, F-450, F-550, and 2020-2021 Lincoln Navigator vehicles. The windshield wiper arms may br
Ford Motor Company (Ford) is recalling certain 2018-2023 Expedition and Lincoln Navigator vehicles equipped with third-row seating; and 2019-2023 F-Super Duty F-250, F-350, F-450, and F-550 SuperCab v
Ford Motor Company (Ford) is recalling certain 2020-2022 F-Super Duty F250, F350, F450, F550, F600, and 2021-2022 F-650, F750 vehicles. Biodiesel deposits may form on the pump drivetrain roller compon
Ford Motor Company (Ford) is recalling certain 2021 Expedition, 2021-2022 Super Duty F-250, F-350, F-450, F-550, F-600, and 2020-2022 Lincoln Corsair vehicles. The rearview camera may display a blank
Ford Motor Company (Ford) is recalling certain 2021-2023 Bronco, Explorer, Lincoln Aviator, F-250 SD, F-350 SD, F-450 SD, F-550 SD, 2021-2022 Lincoln Navigator, Mustang, F-150, and 2022 Expedition ve
Ford Motor Company (Ford) is recalling certain 2020-2022 F-Super Duty F250, F350, F450, F550, 2021-2022 F600, and 2022 F750 vehicles previously repaired incorrectly under recall number 24V957. Biodies
This bulletin supersedes 25-2549. Reason for update: To add 2020 model year chassis cab vehicles. Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnost
Various 2020-2026 Ford and Lincoln vehicles equipped with blind spot information system (BLIS) may experience an inoperative blind spot monitoring with a "Blind Spot System Fault" message displayed in the instrument panel cluster (IPC). Thi
Advance Notice Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines Rear View Camera Replacement If Required After Dealer Evaluation
This article supersedes TSB 24-2249 to update the claim quantity of the torque converter nuts, part number and claim quantity of the front support assembly bolt washers, and part number change of the fluid pan from the Parts List. Some of t
Certain 2017-2025 F-450 F-600 Super Duty Chassis Cab Upfitted with an Aerial Bucket Frame Rail Crack
Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various connectivity concerns with The Ford App Lincoln App including but not limited to: missing activation prompt pop-upon the vehicle's center display screen whe
For 20172026 vehicles equipped with a 10R transmission, a revision to the Road Testing Vehicle procedure has been made in the WSM, located in Section 307-01 > Diagnosis and Testing. This updated procedure improves the diagnosis of customer
Ford and Lincoln vehicles equipped with wired keyless entry keypad systems and accessory wireless keyless entry keypad systems may or may not come with a wallet card containing the master code. Unlike the integrated wired keypad, the access
Showing the 8 most recent of 232 technical service bulletins on file with NHTSA.
Operator was driving a 2021 Ford F550 equipped with an Altec AT48M aerial upfit. As he was driving the operator noted that the check engine light came on and almost immediately followed by the message center displayed "Low Fuel Pressure" w
While driving down the road at approximately 45 mph, under normal conditions, with no warning indicators the low fuel pressure light came on. When the driver stopped the vehicle he lost all power and observed smoke emanating from the under
Showing the 2 most serious of 12 complaints filed with NHTSA.
