TP-5737 5/01 81Section 7 Component Testing and Adjustment
TP-5353-7
12 3 4 5
1. Low idle adjustment screw
2. High idle adjustment screw
3. Injector pump/actuator
4. Shutoff shaft assembly
5. Droop adjusting screw
Figure 7 -30 Governor Adjustments, Typical
Actuator Calibration Procedure
Use the following procedure to set up the mechanical
governor for operation with the electronic integrated
actuator. Perform calibration of both the mechanical
and electronic governor in order for the system to
operate correctly. Lack of maximum power or poor
steady state speed control results from incorrect
calibration. See Figure 7-30.
Note: The factory actuator calibration procedure
requires no additional adjustment. Perform the
actuator calibration procedure only if removal of
the fuel injection pump occurs or the adjustment
is questionable. Do not perform this procedure
unless it is deemed necessary.
1. Turn the shutoff shaft assembly in the fuel injection
pump clockwise to the on position. The shutoff
shaft assembly is the lever located on the backside
of the fuel injection pump. Secure using existing
mechanical linkage.
2. Place the throttle shaft assembly in the high idle
position. Back out the low idle adjustment screw a
maximum of three turns. Excessive backing out of
the low idle screw results in the disengagement of
the pump’s internal components.
Note: Follow this procedure carefully to prevent
engine overspeed and damage to the
generator or other load.
3. Turn the droop adjusting screw counterclockwise
until it stops. Only paralleling generator sets use
the droop adjustment.
Note: Turn the droop adjusting screw clockwise
(CW) two full turns. The mechanical
governor is now set in a position that permits
starting the engine to calibrate the electronic
integrated actuator governor. Do not
operate the engine without the electronic
governor connected and the system
calibrated correctly as described in the
following procedure. After making this
droop adjustment, do not readjust.
Governor Calibration for Nonparalleling
Generator Sets
Preliminary Adjustments
1. Place the generator set master switch in the OFF
position. Do not run the generator set.
2. Set the gain adjustment three divisions from zero.
Final Adjustments
1. Place the generator set master switch in the RUN
position to start the generator set.
2. Adjust the control unit speed potentiometer until
the engine operates at the desired rpm (50 or
60 Hz on the frequency meter).
3. If governing is unstable, turn the gain
potentiometer slightly counterclockwise.
Note: Gain potentiometer has internal stops at 0
and 100%.
4. With the engine running at no load, finalize the gain
adjustment. Turn the gain adjustment clockwise
until the output shaft and linkage stabilizes. Upset
the linkage by hand. If the linkage oscillates 3--5
times and then stops, the setting is correct.
5. Stop the generator set.
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