Ford F-650 2015 Owner's Manual page 208

Inspect air intake piping:
• Check for accumulation of salt deposits (where applicable). If
present, disassemble and clean the complete air intake piping system.
If pitting is evident on the intake piping, use Motorcraft Silicone
Gasket and Sealant TA-30 to seal joints against leakage.
• Check for loose hoses and clamps.
• Check for ruptured or collapsed hoses.
• Check air cleaner housing for cracks.
Suspension Inspection
Note: Do not adjust air suspension height to any setting other than the
specified setting. Altering the height setting changes the driveline angle
and may result in unwarrantable component damage, such as
transmission component damage.
Verify drive axle air suspension height and height control valve
performance at engine oil change intervals.
Periodically check:
• Condition of spring leaves for evidence of fatigue, bending or
breakage.
• Condition of suspension mounting brackets and bushings.
• Torque rod mounting fasteners for tightness.
• For proper suspension alignment. Maintain proper alignment at all
times.
• U-bolts. After the chassis has been operating under load for
1000 miles (1600 kilometers) or six months (whichever comes first),
the U-bolt nuts must be re-torqued. Re-torque the U-bolt nuts every
36000 miles (60000 kilometers) thereafter. Clean and lubricate the
U-bolt and nut threads and seats to make sure a like new condition
when re-torqueing.
Note: See Spring U-bolt check later in this chapter.
Supporting Your Vehicle for Service
WARNING: Do not use a jack when working under a vehicle. It
may give way, causing the vehicle to fall and result in property
damage, personal injury or death. Always use floor stands to support
the vehicle.
2015 F-650/750 (f67)
Owners Guide gf, 2nd Printing, April 2014
USA (fus)
Maintenance 207