FORD 2009 F-550 v.1 - Manual (Page 312)

WARNING: Additional equipment such as snowplow equipment
may effect the performance of the airbag sensors increasing the
risk of injury. Please refer to the Body Builders Layout Book for
instructions about the appropriate installation of additional equipment.
Transmission operation while plowing
Operate the vehicle with the automatic transmission gearshift lever in
the D (Overdrive) position and Tow/Haul off.
• Shift transfer case to 4x4 LOW (4WD Low) when plowing in small
areas at speeds below 5 mph (8 km/h).
• Shift transfer case to 4x4 HIGH (4WD High) when plowing larger
areas or light snow at higher speeds. Do not exceed 15 mph
(24 km/h).
• Do not shift the transmission from a forward gear to R (Reverse) until
the engine is at idle and the wheels are stopped.
• If the vehicle is stuck, shift the transmission in a steady motion
between forward and reverse gears. Do not rock the vehicle for more
than a few minutes. The transmission and tires may be damaged or
the engine can overheat.
Do not rock the vehicle if the engine is not at normal operating
temperature. Do not rock the vehicle for more than a minute. The
transmission and tires may be damaged or the engine may
overheat.
Refer to Transmission temperature gauge in the Instrument Cluster
chapter for transmission fluid temperature information.
WARNING: Do not spin the wheels at over 35 mph (55 km/h).
The tires may fail and injure a passenger or bystander.
2009 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)
Driving
312