TM 5-3810-307-24-2-1
Engine Operating Range
Cummins engines are designed to operate successfully at full throttle under transient conditions down to peak
torque engine speed (RPM). This is consistent with recommended driving practices for good fuel economy.
CAUTION
Excessive full throttle operation below peak torque RPM (peak torque RPM
varies from 1,100 RPM to 1,600 RPM, depending upon rated engine speed) will
shorten engine life to overhaul, can cause serious engine damage, and is
considered engine abuse.
CAUTION
Operation of the engine below peak torque RPM can occur during gear shifting
due to the difference of ratios between transmission gears, but engine operation
must not be sustained more than 1 minute at full throttle below peak torque RPM.
CAUTION
Operating the engine beyond high idle speed can cause severe engine damage.
When descending a steep grade, use a combination of transmission gears and
engine or service brakes to control the vehicle and engine speed.
Engine Shut-down
Allow the engine to idle 3 to 5 minutes after a full load operation before shutting it off. This allows the
engine to cool gradually and uniformly.
Turn the ignition key switch to the OFF position.