FORD 2011 F-550 v.2 - Manual (Page 432)

SPECIAL OPERATING CONDITIONS
If you operate your Ford/Lincoln/Mercury vehicle primarily in one of the
more demanding Special Operating Conditions listed below, you will
need to have some items maintained more frequently. If you only
occasionally operate your vehicle under these conditions, it is not
necessary to perform the additional maintenance. For specific
recommendations, see your Ford or Lincoln Mercury dealership service
advisor or technician.
Towing a trailer or using a camper or car-top carrier
Inspect frequently, service as
required.
– Inspect and lubricate U-joints.
– See axle maintenance items under Exceptions.
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 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 60,000 miles (96,000 km) – Change transfer case fluid (4WD vehicles).
– Change manual transmission fluid.
Scheduled Maintenance Guide
432
2011 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)