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Low Idle Engine RPM
OEM
Description:
The programmable Low Idle Engine RPM feature
sets the minimum engine speed according to driver
preferences.
Available:
All electronically controlled on-highway engines
covered in this handbook
Range:
Engine
Range
Cat
Default
Minimum Maximum
C-10, C-12, C-15,
C-16, C11, C13, C15
600 RPM 750 RPM 600 RPM
3126E, C7, C9 700 RPM 800 RPM 700 RPM
Advantages:
The ability to specify the low idle rpm can be very helpful
if a different low idle rpm is needed, either to suit unique
operating conditions or if there is resonant vibration at
a specifi c rpm ( mirrors, rattles, etc. ). Lower idle rpm in
conjunction with the proper load starting technique (“no
throttle” starts) also reduces clutch wear.
Disadvantages:
Idling at higher speed increases fuel consumption and
engine wear. Every effort should be made to stay as low
as possible.
Recommendations:
✔ This adjustment is rarely required and should be
done on a case by case basis.
Engine/Gear Parameters