Engine Idle Speed Adjustment - Volvo 9700 US/CAN 2016 Driver's Handbook Manual

116 Starting and driving

Engine idle speed adjustment

The normal engine idling speed is 575–625
rpm. Keeping the idling speed constant
is the task of the engine electronic control
system, which makes manual adjustment
unnecessary. When the bus is stationary, the
idling speed can be temporarily raised to
1200 rpm adjusting as follows.
Idle speed adjustment
Before you start to adjust the engine idling
speed, the engine must be warmed up to
operating temperature, adjust the idle speed
as follows:
•
The switch (B) in the control lever at the
steering column left side, should be in ON
position.
•
Press the "SET" button (A, located at the
end on the same lever) to the "+" position.
Each time this button is pressed to this
position is obtained by an increase of 10
rpm on the idle speed.
•
If the idle speed torn high, can be reduce
by press the "SET" button (A) to the
position "-". Each time this button is
pressed to this position is obtained by an
decrease of 10 rpm on the idle speed.
Note: The change in idling speed is only
temporary. After pressing a pedal, engaging a
gear or releasing the parking brake, the idling
speed will return to its manufacturer settings
(575–625 rpm).
T0012078