2003 Ford F350 Diesel Supplement 2nd Printing - Page 59

General Owner's Information F-450 and F-550 axle maintenance Replace rear axle lubricant every 100,000 miles under normal driving conditions on all F-450 and F-550 commercial applications. For F-450 and F-550 trucks operated at or near maximum Gross Vehicle Weights, the rear axle lubricant should be replaced every 50,000 miles. In addition, this 50,000 mile schedule should be observed when the vehicles are operated under the Special Operating Conditions, where noted. SPECIAL OPERATING CONDITIONS Towing a trailer or using a camper or car-top carrier Every 5,000 miles or 6 months: Change engine oil and replace filter Every 15,000 miles: Inspect and lubricate 4x2 ball joints and steering idler arms Every 30,000 miles: Lubricate 4x4 hub needle bearings Every 60,000 miles: Change transfer case fluid As required: Change manual transmission fluid Extensive idling and/or low-speed driving for long distances as in heavy commercial use such as delivery, taxi, patrol or livery Every 5,000 miles, 6 months or 200 hours (whichever comes first): Change engine oil and replace filter Every 5,000 miles: Inspect brake system. Inspect and lubricate 4x2 ball joints and steering idler arms 30,000 miles and 90,000 miles: Lubricate 4x2 wheel bearings. Replace wheel bearing grease seal. Every 60,000 miles: Change transfer case fluid As required: Replace cabin air filter, if equipped Operating in dusty conditions such as unpaved or dusty roads Every 5,000 miles or 6 months: Change engine oil and replace filter Every 5,000 miles: Check air filter minder (replace air filter as required or when air filter minder indicates) Every 15,000 miles: Inspect and lubricate 4x2 ball joints and steering idler arms Every 60,000 miles: Change transfer case fluid As required: Replace cabin air filter, if equipped 59