Ford 2002 F650 Owner's Manual page 131

Driving
• Front end out of alignment
• Total vehicle out of alignment (i.e. rear axle[s] out of alignment with
front axle)
• Improper adjustment in the steering gear
• Vehicle overloaded or unevenly loaded
• High crosswinds
• High crown in center of road
• Components in steering linkage loose or worn
• Wheel bearings improperly adjusted
• Excessive lash in steering shaft or universal joints
If the vehicle steers hard
Hard steering can be caused by any of the following conditions:
• Underinflated tire(s) on any wheel(s)
• Vehicle overload
• Misalignment of the front tires
• Lack of lubricant in the front spindle bearings or linkage components
• Low oil level in the power steering system
• Broken or loose power steering pump direct drive connection
• Malfunctioning relief valve in power steering gear or steering pump
• Malfunctioning power steering pump
• Restriction in power steering lines
• Improperly set turn stops
• Air entrapped in power steering system fluid
AIR SUSPENSION SYSTEM (IF EQUIPPED)
The on-highway air suspension system is designed to provide a superior
ride, outstanding driver comfort while minimizing wear on the cab, frame
and payload.
The height control valve automatically keeps the vehicle at a constant
level due to load changes and uneven road surfaces.
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