Ford F-650 Owner's Manual page 107

Hot weather operation
• Use a permanent-type engine coolant to protect the engine against
damage from overheating.
• Fill the fuel tank at the end of daily operation to prevent condensation
in the fuel system.
• Keep external surfaces of the engine, radiator, charge air cooler, A/C
condenser and accessories clean to avoid dirt build-up.
• Above normal coolant temperatures could be experienced while
driving in a transmission gear ratio which lugs the engine. To correct
this problem, engine speed should be increased by downshifting into
the next lower gear.
Restarting after running out of fuel
The fuel system may need to be purged of air, refer to Running out of
fuel in the Maintenance and Specifications chapter.
Engine shutdown (diesel engine only)
Allow the engine to idle for three to five minutes before shutting it
down. The larger the engine, the greater the need for this idling period.
However, do not let the engine idle for more than 10 minutes.
GENERAL OPERATING INSTRUCTIONS
• Start the vehicle in motion by using the highest gear speed in the
transmission that lets the engine easily start the load without slipping
the clutch.
• Accelerate smoothly and evenly; rapid acceleration increases fuel
consumption without increasing engine performance.
• When approaching a hill, press the accelerator smoothly to start the
incline at full power, then shift down as needed to maintain vehicle speed.
• When going down a hill, or long steep grades, prevent overspeeding of
the engine; normally, choose the same gear to descend the hill that
you use to ascend the hill. The engine governor has no control over
engine speed when it is being pushed by a loaded vehicle.
• Operate in a gear that permits an engine speed not in excess of the
maximum governed speed or high-idle RPM (no load).
• Always shift to a lower gear at high altitudes to prevent engine smoking.
• Diesel engines: Allow the engine to idle for three to five minutes
before shutting it down; the larger the engine, the greater the need for
this idling period. However, do not let the engine idle for more than
10 minutes.
2012 F-650/750 (f67)
Supplement, 2nd Printing
USA (fus)
Driving
107