FORD 2011 F-550 v.2 - Manual (Page 434)

Operating in dusty conditions such as unpaved or dusty roads
Inspect frequently, service as
required
– Replace cabin air filter (if equipped).
– Replace engine air filter.
Every 5,000 miles (8,000 km) – Rotate tires, inspect tires for wear and measure tread
depth.
– Inspect wheels and related components for abnormal
noise, wear, looseness or drag.
Every 5,000 miles (8,000 km) or
6 months
– Change engine oil and replace oil filter.
– Inspect and lubricate U-joints.
Every 15,000 miles (24,000 km) – Replace fuel filter (Ranger).
Every 30,000 miles (48,000 km) – Change automatic transmission fluid (not required on
6R80 or TorqShift ா transmissions).
– Replace front wheel bearing grease/grease seals on
2WD vehicles (if non-sealed bearings are used).
Every 50,000 miles (80,000 km) – Change manual transmission fluid.
– Change rear axle lubricant (E-450 and F-450/550
only).
Every 60,000 miles (96,000 km) – Change transfer case fluid (4WD vehicles).
Scheduled Maintenance Guide
434
2011 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)