Ford 2013 F-650 Owner's Manual page 208

Special applications may warrant a setting based on experience with the
type of tire operating loads and conditions. Radial tires are more
sensitive to toe-in setting than bias ply tires. While not insensitive to
vehicle alignment, fine tuning school bus alignment to line-haul truck
standards does not drastically improve tire tread life.
Rear Axle
Regular inspections should include:
• checking for proper tightness of axle mounting U-bolt nuts, attaching
or mounting bolts and nuts. See Spring U-bolt checks later in this
chapter.
• checking the axle for damage, binding, worn parts and adequate
lubrication.
NoSpin Detroit Locker Positive Locking Differential
Vehicles equipped with this type differential have the operator's manual
supplied with the vehicle. See that manual for maintenance inspections.
2013 F-650/750 (f67)
Owners Guide gf, 2nd Printing, March 2013
USA (fus)
Maintenance 207