2021 FORD F-350 maintenance schedule

Sustained High-speed Driving at Gross Vehicle Weight Rating - Maximum Loaded Weight
for Vehicle Operation
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Replace the wheel bearing grease and grease seals if you
use non-sealed bearings. Two-wheel drive vehicles.
Every
30,000 mi
(48,000 km)
Flush and refill the coolant.
At
60,000 mi (96,000 km)
or 2400 engine hours
Note: After the initial coolant flush and fill at
60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter. Operating in Sustained Ambient Temperatures Below -9°F (-23°C) or Above 100°F (38°C)
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km), six months or
600 engine hours
Replace the wheel bearing grease and grease seals if using
non-sealed bearings. Two-wheel drive vehicles.
Every
30,000 mi
(48,000 km) Operating in Dusty or Sandy Conditions (Such as Unpaved or Dusty Roads)
Rotate the tires, inspect the tires for wear and measure
tread depth.1
Every
7,500 mi (12,000 km)
Inspect the brake system pads and rotors.
Inspect the air filter restriction gauge. Replace the air filter
if necessary.2
Inspect the steering, suspension ball joints and the tie rods.
Lubricate any grease fittings.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Operating in Dusty or Sandy Conditions (Such as Unpaved or Dusty Roads)
Change the engine oil and filter. 3
Every 7,500 mi (12,000 km),
six months or 300 engine
hours
Inspect and lubricate the U-joints.
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), 6 months or
600 engine hours
Replace the air inlet foam filter.
Every
30,000 mi
(48,000 km) Replace the wheel bearing grease and grease seals if you
use non-sealed bearings. Two-wheel drive vehicles.
1 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear.
2 Reset the engine air filter information monitor after you replace the air filter.
3 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes. Off-road Operation
Inspect the functional holes in each leg of the twin exhaust
tips and the holes under the shield just inboard of the right
rear tire to make sure they are clean and clear of debris or
foreign materials. Refer to the Vehicle Care chapter of your
owner ’s manual for more information.
As required
Inspect the steering, suspension ball joints and the tie rods.
Lubricate any grease fittings.
Rotate the tires, inspect the tires for wear and measure
the tread depth.1
Every 7,000 mi (12,000 km),
six months or 300 engine
hours
Inspect the brake system pads and rotors.
Inspect the air filter restriction gauge. Replace the air filter
if necessary.2
Change the engine oil and filter. 3
Every 7,000 mi (12,000 km)
or 300 engine hours
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km), six months or
600 engine hours
Replace the air inlet foam filter.
Every
30,000 mi
(48,000 km)
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Off-road Operation
Replace the wheel bearing grease and grease seals if you
use non-sealed bearings. Two-wheel drive vehicles.
Change the rear axle fluid. Dana rear axles only - some F-
350s; all F-450s and F-550s.
Every 50,000 mi
(80,000 km)
Change the transfer case fluid. Four-wheel drive vehicles.
Inspect the front axle fluid. Four-wheel drive vehicles.
1 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear.
2 Reset the engine air filter information monitor after you replace the air filter.
3 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes. Using Biodiesel, up to and Including 20% Biodiesel (B20)
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km), six months or
300 engine hours Using Fuel Other Than Ultra-low Sulfur Diesel Fuel - Vehicles Operated Where Ultra-low
Sulfur Diesel Fuel is not Required or Available
Change the engine oil and filter.
Every
2,500 mi (4,000 km)
or three months (if using
high sulfur fuel with more
than 500 ppm sulfur)
Change the engine oil and filter.
Every
5,000 mi (8,000 km)
or six months (if using high
sulfur fuel with fewer than
500 ppm sulfur)
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Exceptions
Axle and Transfer Case Maintenance
Axle(s) and transfer case, 4X4 only, fluid
changes or level checks are not required
unless a leak is suspected or the assembly
has been submerged in water. During long
periods of trailer towing with outside
temperatures above 70°F (21°C) or at
wide-open throttle for long periods above
45 mph (72 km/h)
, change the rear axle
fluid every 30,000 mi (48,000 km) if the
rear axle is filled with non-synthetic fluid.
This interval can be waived and the
150,000 mi (240,000 km) service interval
can continue if the rear axle is filled with
75W140 synthetic gear fluid meeting Ford
specification WSL-M2C192-A, part number
XY-75W140-QL, or equivalent. Add friction
modifier XL-3 (EST-M2C118-A) or
equivalent for complete refill of
Traction-Lok rear axles. See
Capacities
and Specifications (page 441).
Additional Axle Maintenance for Dual
Rear Wheels
Change the rear axle fluid every
250,000 mi (400,000 km)
under normal
driving conditions on all commercial
applications. When you operate your
vehicle at or near maximum gross vehicle
weights, change the rear axle fluid every
60,000 mi (96,000 km)
. In addition,
follow this 60,000 mi (96,000 km)
schedule when you operate your vehicle
under the special operating conditions
where noted. California Fuel Filter Replacement
If you register your vehicle in California, the
California Air Resources Board has
determined that the failure to perform this
maintenance item does not nullify the
emission warranty or limit recall liability
before the completion of your vehicle's
useful life. Ford Motor Company, however,
urges you to have all recommended
maintenance services performed at the
specified intervals and to record all vehicle
service.
Hot Climate Oil Change Intervals
Vehicles operating in the Middle East,
North Africa, Sub-Saharan Africa or
locations with similar climates using an
American Petroleum Institute (API)
Certified for Gasoline Engines (Certification
mark) oil of SM or SN quality, the normal
oil change interval is 3,000 mi (5,000 km).
If the available API SM or SN oils are not
available, then the oil change interval is
2,000 mi (3,000 km)
.
Engine Air Filter and Cabin Air Filter
Replacement
The life of the engine air filter and cabin air
filter is dependent on exposure to dusty
and dirty conditions. Vehicles operated in
these conditions require frequent
inspection and replacement of the engine
air filter and cabin air filter.
Diesel Particulate Filter
Over time, a slight amount of ash builds
up in the diesel particulate filter, which is
not removed during the regeneration
process. The filter may need to be replaced
with a new or remanufactured part at
approximately 250,000 mi (400,000 km).
Actual mileage varies depending on engine
and vehicle operating conditions.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

In this case, the engine control system
illuminates a service light , wrench icon, to
inform you to bring your vehicle to the
dealer for service. If there are any issues
with the oxidation catalyst or particulate
filter system, the engine control system
illuminates a service light, wrench or engine
icon to inform you to bring your vehicle into
a dealer for service.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Motorcraft Parts - 6.2L..............................443
Motorcraft Parts - 6.7L Diesel.................445
Motorcraft Parts - 7.3L..............................446
MyKey – Troubleshooting
...........................64
MyKey ™..............................................................61
Principle of Operation......................................... 61
N
Navigation......................................................535 Changing the Format of the Map................537
cityseeker.............................................................. 539
Michelin Travel Guide...................................... 540
Navigation Map Accuracy and Updates........................................................... 540
Route Guidance.................................................. 537
Setting a Destination....................................... 536
SiriusXM Traffic and Travel Link.................. 540
Zoom....................................................................... 537
Normal Scheduled Maintenance..........568 Diesel Engine........................................................ 571
Gasoline Engine.................................................. 570
Intelligent Oil-Life Monitor............................ 568
O
Off-Road Driving
...........................................317
After Off-Road Driving...................................... 319
Basic Off-road Driving Techniques..............318
Crossing Obstacles............................................ 319
Hill Climbing......................................................... 319
Oil Change Indicator Reset......................356
Oil Check See: Engine Oil Check - 6.2L.......................... 352
See: Engine Oil Check - 6.7L Diesel............354
See: Engine Oil Check - 7.3L.......................... 355
Opening and Closing the Hood
..............348
Ordering Additional Owner's Literature......................................................337
Obtaining a French Owner ’s Manual..........337
Overhead Console.........................................171
Overriding Automatic High Beam Control............................................................93
P
Parking Aids
...................................................234
Principle of Operation...................................... 234Parking Brake
.................................................225
Passive Anti-Theft System.........................76
SecuriLock®........................................................... 76
PATS See: Passive Anti-Theft System..................... 76
Perchlorate........................................................15
Phone...............................................................533 Android Auto....................................................... 535
Apple CarPlay..................................................... 535
Pairing Your Cell Phone for the First Time................................................................... 534
Text Messaging................................................... 534
Using Your Cell Phone..................................... 534
Pickup Bed Anchor Points.........................277 Installing and Removing the Pickup Bed
Tie-Down Cleats............................................ 277
Locating the Pickup Bed Anchor Points................................................................. 277
Pickup Bed Anchor Point Load Capacities........................................................ 278
Pickup Bed Anchor Point Precautions...................................................... 277
Pickup Bed
......................................................277
Pickup Bed Anchor Points............................... 277
Pickup Bed Ramps............................................ 279
Pickup Bed Ramps......................................279 Installing and Removing the Pickup Bed
Ramp Holder................................................... 279
Installing and Removing the Pickup Bed Ramps.............................................................. 280
Pickup Bed Ramp Precautions..................... 279
Storing the Pickup Bed Ramps..................... 281
Post-Crash Alert System..........................329
Power Door Locks See: Locking and Unlocking............................. 66
Power Running Boards
.................................78
Power Seats...................................................154
Adjusting the Lumbar Support...................... 155
Adjusting the Multi-Contour Front Seats With Active Motion ....................................... 155
Power Steering Fluid Check
.....................378
Power Take-Off.............................................212
Split Shaft Capability........................................ 212
Power Windows
.............................................95
Accessory Delay................................................... 96
Bounce-Back......................................................... 95
One-Touch Up or Down..................................... 95
Window Lock......................................................... 96
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Index

Switching the Heated Seat Settings On and
Off........................................................................\
. 141
Switching the Heated Steering Wheel Settings On and Off....................................... 141
Removing the Tailgate..................................72
Repairing Minor Paint Damage..............399
Replacement Parts Recommendation........................................16
Collision Repairs.................................................... 16
Scheduled Maintenance and Mechanical Repairs................................................................. 16
Warranty on Replacement Parts.................... 16
Replacing a Lost Key or Remote Control
............................................................60
Replacing the Cabin Air Filter..................150
Reporting Safety Defects (Canada Only)..............................................................337
Reporting Safety Defects (U.S. Only)..............................................................337
Resuming the Set Speed..........................243
Roadside Assistance
..................................325
Vehicles Sold in Canada: Getting Roadside
Assistance....................................................... 326
Vehicles Sold in the United States: Getting Roadside Assistance................................... 325
Vehicles Sold in the United States: Using Roadside Assistance................................... 325
Roadside Emergencies..............................325
Running-In See: Breaking-In................................................. 320
Running Out of Fuel....................................189
S
Safety Canopy ™
.............................................52
Safety Precautions......................................184
Satellite Radio
..............................................484
Satellite Radio Electronic Serial Number
(ESN)................................................................ 485
Satellite Radio Reception Factors..............485
SiriusXM Satellite Radio Service.................485
Troubleshooting................................................ 486
Scheduled Maintenance
..........................565
Seatbelt Extensions......................................44
Seatbelt Height Adjustment......................42
Seatbelt Reminder........................................43
Belt-Minder™........................................................ 43Seatbelts...........................................................38
Principle of Operation........................................ 38
Seatbelt Warning Lamp and Indicator Chime...............................................................42
Conditions of operation..................................... 42
Seats...................................................................151
Security..............................................................76
Selective Catalytic Reductant System - Diesel..............................................................197
Contaminated Diesel Exhaust Fluid or Inoperative Selective Catalytic Reduction
System............................................................... 201
Diesel Exhaust Fluid Guidelines and Information..................................................... 200
Diesel Exhaust Fluid Level............................... 197
Diesel Exhaust Fluid Warning Messages and Vehicle Operations............................... 199
Filling the Diesel Exhaust Fluid Tank..........198
Settings...........................................................543 ........................................................................\
.......... 543
911 Assist............................................................... 543
Ambient Lighting............................................... 544
Audio...................................................................... 543
Automatic Updates.......................................... 543
Charge Settings................................................. 544
Clock....................................................................... 543
Display................................................................... 544
Driver Assist......................................................... 543
FordPass............................................................... 543
General.................................................................. 543
Message Center................................................. 544
Mobile Apps......................................................... 543
Multi Contour Seats.......................................... 544
Navigation............................................................ 544
Personal Profiles................................................ 544
Phone..................................................................... 543
Seats...................................................................... 544
Sound..................................................................... 543
Valet Mode........................................................... 544
Vehicle................................................................... 543
Voice Control....................................................... 544
Setting the Blower Motor Speed............144
Setting the Cruise Control Speed..........242 Changing the Set Speed................................. 242
Setting the Temperature...........................144
Setting the Trail Control Speed...............231
Side Airbags......................................................51
Sitting in the Correct Position...................151
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Index

Sliding Windows............................................99
Power Sliding Back Window........................... 99
Snow Chains See: Using Snow Chains................................. 420
Snow Plowing................................................321
Engine temperature while plowing.............323
Installing the Snowplow.................................. 321
Operating the Vehicle with the Snowplow Attached........................................................... 322
Snowplowing with your Airbag Equipped Vehicle............................................................... 322
Transmission operation while plowing............................................................. 323
Spare Wheel See: Changing a Road Wheel....................... 429
Special Notices
................................................16
New Vehicle Limited Warranty........................ 16
On Board Diagnostics Data Link Connector........................................................... 16
Special Instructions............................................. 16
Using a Slide-In Camper..................................... 17
Using your Vehicle as an Ambulance.............17
Using your Vehicle as a Stationary Power Source................................................................... 17
Using your Vehicle With a Snowplow............17
Special Operating Conditions Scheduled Maintenance...............................................574
Diesel Engine........................................................ 577
Exceptions............................................................ 582
Gasoline Engine.................................................. 574
Speed Control See: Cruise Control............................................ 242
Spot Lamps.....................................................90
Spring U-Bolt Check - F-600.................389 U-bolt Nut Torque............................................. 390
Stability Control
...........................................228
Principle of Operation...................................... 228
Starter Switch See: Ignition Switch............................................ 174
Starting a Diesel Engine - 6.7L Diesel...............................................................177
Automatic Engine Shutdown......................... 179
Cold Weather Operation.................................. 179
Cold Weather Starting...................................... 179
Diesel Engine Fast Start Glow Plug System............................................................... 178
Vehicles with an Ignition Key.......................... 178
Vehicles with Keyless Start............................. 178Starting a Gasoline Engine - 6.2L/
7.3L...................................................................175
Automatic Engine Shutdown......................... 176
Cold Weather Starting (Flexible Fuel Vehicles Only).................................................. 177
Failure to Start..................................................... 176
Guarding Against Exhaust Fumes.................177
Important Ventilating Information................177
Stopping the Engine When Your Vehicle is Moving................................................................ 176
Stopping the Engine When Your Vehicle is Stationary......................................................... 176
Vehicles with an Ignition Key.......................... 175
Vehicles with Keyless Start............................. 176
Starting and Stopping the Engine..........174 General Information........................................... 174
Steering...........................................................262 Adaptive Learning............................................. 263
Adaptive Steering.............................................. 263
Electronic Torque Overlay Steering............262
Hydraulic Power Steering............................... 262
Steering Wheel
...............................................80
Storage Compartments..............................171
Sunroof See: Moonroof..................................................... 100
Sun Visors
.......................................................100
Illuminated Vanity Mirror................................. 100
Supplementary Restraints System.........45 Principle of Operation........................................ 45
Switching Air Conditioning On and Off....................................................................143
Switching Automatic High Beam Control On and Off.....................................................93
Activating the Automatic High Beam Control ................................................................. 93
Switching Climate Control On and Off....................................................................143
Switching Cruise Control On and Off
...................................................................242
Switching Cruise Control Off......................... 242
Switching Cruise Control On......................... 242
Switching Maximum Cooling On and Off....................................................................143
Switching Maximum Defrost On and Off....................................................................143
Switching Off the Engine - 6.7L Diesel..............................................................182
659
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Index