Kohler 40COZ/33CFOZ Service Manual page 96

Governor Calibration for Paralleling
Generator Sets
Calibration Procedure
1. Place the generator set master switch in the OFF
position. Do not run the generator set.
2. Set the gain potentiometer at 30% and turn the
droop potentiometer completely counterclockwise.
3. Turning the 20-turn potentiometer clockwise
increases idle
counterclockwise decreases idle speed.
4. Turning the 20-turn potentiometer clockwise
increases run
counterclockwise decreases run speed.
5. Place the generator set master switch in the RUN
or TEST position to start the generator set.
6. Slowly turn the gain potentiometer clockwise until
the engine becomes unstable. After the engine
becomes unstable,
potentiometer counterclockwise
Interrupt the governor by momentarily removing
power from the governor.
recover in 3--5
oscillation.
7. Stop the generator set.
82 Section 7 Component Testing and Adjustment
speed and turning
speed and turning
slowly turn the
until stable.
The engine should
seconds with diminishing
Droop Adjustment Procedure
1. Place the generator set master switch in the RUN
or TEST position to start the generator set.
2. Use the run speed potentiometer to set the engine
rpm to the desired no load speed (frequency) on
the frequency meter.
3. Apply full load to the generator set.
4. While observing the frequency meter, slowly turn
the droop potentiometer clockwise to the desired
it
droop percentage.
5. Remove full load from the generator set.
it
6. Using the run speed potentiometer, readjust the
engine rpm to the desired no load speed
(frequency) on the frequency meter.
7. Stop the generator set.
gain
TP-5737 5/01