Engines control can be used on Cummins engines is 30 mph (48 km/h). 2. To disengage the cruise control: 2.1 Depress the foot brake, trailer brake, clutch pedal, or WARNING Do not activate the fifth wheel air slider control valve when the vehicle is in motion. Doing so could result in damage to the fifth wheel member, kingpin, cab, or trailer, and ultimately, to the drivetrain. A guard is positioned around the switch to prevent it from being accidentally activated. To resume a preselected cruise speed, momentarily move the SET/RESUME switch to RESUME. Cruise will return to the last speed selected. 2.2 Flip the ON/OFF switch to OFF.
Cruise speed can be adjusted up or down by holding the SET/RESUME switch at SET (accelerate) or at RE- SUME (decelerate) until the desired speed is reached. CAUTION NOTE: The resume vehicle speed memory is not maintained if the cruise control ON/OFF switch is turned OFF, or if the ignition is shut off. Do not attempt to shift gears without using the clutch pedal when the cruise control is engaged. Failure to follow this precaution will result in a tem- porarily uncontrolled increase in engine speed; transmission damage and gear stripping could re- sult. Power Takeoff (PTO) Governor Cummins electronic engines may be equipped with a PTO governor.
The PTO mode is activated by the ON/ OFF and SET/RESUME switches. 1. To cruise at a particular speed: 1. Engage the PTO as follows: 1.1 Flip the ON/OFF switch to ON. 1.2 Hold the throttle down until the speedometer reaches the desired speed. 1.1 Flip the ON/OFF switch to ON. 1.2 Hold the throttle pedal down until the ta- chometer reaches the desired engine speed. 1.3 Momentarily move the SET/RESUME switch to SET. 1.3 Momentarily move the SET/RESUME switch to SET. 4.7