FORD 2009 F-550 v.3 - Manual (Page 23)

If equipped with a three button message center, press and release
the message center INFO button until TRIP A or TRIP B appears in the
display. Press the RESET button to reset.
Tachometer: Indicates the engine speed in revolutions per minute.
Driving with your tachometer pointer continuously at the top of the scale
may damage the engine.
Standard instrument cluster
Harley-Davidson instrument
cluster
Engine hour meter (if
equipped): Registers the
accumulated time the engine has
been running. Press and release the
message center INFO button until
this is displayed.
2009 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)
Instrument Cluster
23