Ford F-550 (2017 year). Manual — part 144

Frequent low-speed operation, consistent heavy traffic under 25 mph (40 km/h) or long

rush-hour traffic

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 15000 miles (24000
km), six months, 600 engine
hours

Inspect the engine and secondary cooling system coolant
concentration (freeze-point protection) and additive
(corrosion inhibitor) strength. Add coolant additive if
necessary.

Every 30000 miles (48000
km) or 1200 engine hours

Flush and refill the coolant. Do not add coolant additive.

Every 60000 miles (96000
km) or 2400 engine hours

Note: When adding coolant additive, do not exceed the specified maximum of 48 fluid
ounces (1.4 liters) for the engine and 16 fluid ounces (473 ml) for the secondary cooling
system. Operating the engine with excessive coolant additive may cause overheating which
could lead to severe, permanent engine damage.

Note: After the initial coolant flush and fill at 60000 miles (96000 kilometers) or 2400
engine hours, flush and fill every 45000 miles (72000 kilometers) or 1800 engine hours
thereafter.

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 15000 miles (24000
km), six months, 600 engine
hours

Replace the wheel bearing grease and grease seals if using
non-sealed bearings. (Two-wheel drive vehicles)

Every 30000 miles (48000
km)

Sustained high-speed driving at gross vehicle weight rating (maximum loaded weight

for vehicle operation)

Inspect the engine and secondary cooling system coolant
concentration (freeze-point protection) and additive
(corrosion inhibitor) strength. Add coolant additive if
necessary.

Every 30000 miles (48000
km) or 1200 engine hours

Flush and refill the coolant. Do not add coolant additive.

Every 60000 miles (96000
km) or 2400 engine hours

Note: When adding coolant additive, do not exceed the specified maximum of 48 fluid
ounces (1.4 liters) for the engine and 16 fluid ounces (473 ml) for the secondary cooling
system. Operating the engine with excessive coolant additive may cause overheating which
could lead to severe, permanent engine damage.

Note: After the initial coolant flush and fill at 60000 miles (96000 kilometers) or 2400
engine hours, flush and fill every 45000 miles (72000 kilometers) or 1800 engine hours
thereafter.

Operating in sustained ambient temperatures below -10°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 15000 miles (24000
km), six months, 600 engine
hours

Replace the wheel bearing grease and grease seals if using
non-sealed bearings. (Two-wheel drive vehicles)

Every 30000 miles (48000
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.

Every 7500 miles (12000
km)

Inspect the brake system pads and rotors.

Inspect the air filter restriction gauge. Replace the filter if
necessary.

Inspect the steering and suspension ball joints and tie rods.
Lubricate any grease fittings.

Operating in dusty or sandy conditions (such as unpaved or dusty roads)

Change the engine oil and filter.

**

Every 7500 miles (12000
km), six months or 300
engine hours

Inspect and lubricate the U-joints.

Replace the engine-mounted and frame-mounted fuel
filters.

Every 15000 miles (24000
km), six months, 600 engine
hours

Replace the air inlet foam filter.

Every 30000 miles (48000
km)

Replace the wheel bearing grease and grease seals if using
non-sealed bearings. (Two-wheel drive vehicles)

*

Vehicles with dual rear wheels should rotate the front wheels when specified; rear wheels

only if unusual wear is noted.

**

Reset the Intelligent Oil-Life Monitor after engine oil and filter changes.

Off-road operation

Inspect 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 and suspension ball joints and tie rods.
Lubricate any grease fittings.

Rotate the tires

*

, inspect the tires for wear and measure

tread depth.

Every 7500 miles (12000
km), six months or 300
engine hours

Inspect the brake system pads and rotors.

Inspect the air filter restriction gauge. Replace the filter if
necessary.

Change the engine oil and filter.

**

Every 7500 miles (12000
km) or 300 engine hours

Replace the engine-mounted and frame-mounted fuel
filters.

Every 15000 miles (24000
km), six months, 600 engine
hours

Replace the air inlet foam filter.

Every 30000 miles (48000
km)

Replace the wheel bearing grease and grease seals if using
non-sealed bearings. (Two-wheel drive vehicles).

Off-road operation

Change the rear axle fluid (Dana rear axles only - some F-
350s; all F-450s and F-550s).

Every 50000 miles (80000
km)

Change the transfer case fluid. (Four-wheel drive vehicles)

Inspect the front axle fluid. (Four-wheel drive vehicles)

*

Vehicles with dual rear wheels should rotate the front wheels when specified; rear wheels

only if unusual wear is noted.

**

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 15000 miles (24000
km), six months, 600 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 engine oil and filter.

Every 2500 miles (4000
km) or three months (if
using high sulfur fuel with
more than 500 ppm sulfur)

Change engine oil and filter.

Every 5000 miles (8000
km) or six months (if using
high sulfur fuel with fewer
than 500 ppm sulfur)

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
above45 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 (240,000km) service interval
can continue if the rear axle is filled with
75W140 synthetic gear fluid meeting Ford