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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)
569
Super Duty (TFE), enUSA, Edition date: 201909, Third-Printing-
Scheduled Maintenance
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