Ford F-550 (2017 year). Manual — part 143

Extensive idling or low-speed driving for long distances, as in heavy commercial use

(such as delivery, taxi, patrol car or livery)

Lubricate control arm and steering ball joints if equipped
with grease fittings.

Rotate tires

*

, inspect tires for wear and measure tread

depth.

Inspect and lubricate U-joints if equipped with grease
fittings.

Every 5000 miles (8000
km) or six months

Change engine oil and filter.

Every 5000 miles (8000
km), six months or 200
engine hours

Replace front wheel bearing grease and grease seals if
non-sealed bearings are used.

Every 30000 miles (48000
km)

Replace spark plugs.

Every 60000 miles (96000
km)

*

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

only if unusual wear is noted.

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

Replace engine air filter.

Inspect frequently, service
as required

Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.

Every 5000 miles (8000
km)

Rotate tires

*

, inspect tires for wear and measure tread

depth.

Change engine oil and filter.

Every 5000 miles (8000
km) or six months

Inspect and lubricate U-joints if equipped with grease
fittings.

Replace front wheel bearing grease and grease seals if
non-sealed bearings are used.

Every 30000 miles (48000
km)

*

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

only if unusual wear is noted.

Off-road operation

Inspect steering linkage, ball joints and U-joints, Lubricate
if equipped with grease fittings.

Inspect frequently, service
as required

Replace engine air filter.

Change engine oil and filter.

Every 5000 miles (8000
km) or six months

Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.

Rotate tires

*

, inspect tires for wear and measure tread

depth.

Replace front wheel bearing grease and grease seals if
non-sealed bearings are used.

Every 30000 miles (48000
km)

*

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

only if unusual wear is noted.

Exclusive use of E85 (Flex fuel vehicles only)

If ran exclusively on E85, fill the fuel tank full with regular
unleaded fuel.

Every oil change interval

Diesel Engine(s)

If you operate your vehicle primarily in any
of the following conditions, you need to
perform extra maintenance as indicated.
If you operate your vehicle occasionally
under any of these conditions, it is not
necessary to perform the extra
maintenance. For specific
recommendations, see your dealership
service advisor or technician.

Towing a trailer or using a car-top carrier

Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.

As required

See the axle maintenance items under Exceptions.

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

Every 15000 miles (24000
km), 6 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)

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.

Frequent or extended idling (over 10 minutes per hour of normal driving) or frequent low-

speed operation if your vehicle is used for stationary 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

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.