2020 FORD F450 SUPER DUTY Owners Manual

Page 569 of 633

FORD F450 SUPER DUTY 2020  Owners Manual Other Maintenance items
1
Change the automatic transmission fluid and filter. Consult
dealer for requirements.
Every 150,000 mi
(240,000 km) Replace the accessory drive belt or belts if not replaced
w

Page 570 of 633

FORD F450 SUPER DUTY 2020  Owners Manual Towing a Trailer or Using a Car-top Carrier
Inspect and lubricate the U-joints grease fittings - if
applicable.
Inspect frequently, service
as required
See the axle maintenance items under Exceptions.

Page 571 of 633

FORD F450 SUPER DUTY 2020  Owners Manual Extensive Idling or Low-speed Driving for Long Distances, as in Heavy Commercial Use
- Such as Delivery, Taxi, Patrol Car or Livery
Change the engine oil and filter.
Every 5,000 mi (8,000 km)
or six m

Page 572 of 633

FORD F450 SUPER DUTY 2020  Owners Manual Off-road operation
Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.
Rotate tires, inspect tires for wear and measure the tread
depth. 1
Replace front wheel bearin

Page 573 of 633

FORD F450 SUPER DUTY 2020  Owners Manual Towing a Trailer or Using a Car-top Carrier
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

Page 574 of 633

FORD F450 SUPER DUTY 2020  Owners Manual 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 serv

Page 575 of 633

FORD F450 SUPER DUTY 2020  Owners Manual 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-joint

Page 576 of 633

FORD F450 SUPER DUTY 2020  Owners Manual 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-45