Repeat maximum and minimum
ma adjustments until terminal shaft travels
correct distance and steps (12), (13) and
(14) are satisfied.
Shut off test stand, if used.
Disconnect test circuit. Remove speed
setting adapter plate and replace it with
cover. Be sure speed setting screws
protrude the same distance below edge of
case, or that the governor's speed is
sufficiently high to prevent interference with
Disconnect unit, remove and
drain test fluid.
Adjustments After Tests. When actually
operating, set the governor section approximately
5 percent higher than the actuator section. This
allows the actuator to control.
12-3. ADJUSTMENTS. Speed adjustments may be
performed with the governor actuator installed on the
a.The speed adjustment screw in on top of
the unit. Turn the adjustment screw
clockwise to increase the speed and
counterclockwise to decrease speed.
b.Figure 12-3 shows the speed adjustment
shaft (23), and the high (16) and low (3)
speed stop screws. Use the speed
adjusting shaft to change speeds between
these preset ranges. Speed may be
changed remotely with the speed adjusting
shaft and the proper connections.
c. Adjust the unit's speed using the speed
adjustment screw or speed adjusting shaft
until the desired steady-state speed is
obtained. Simulate an underspeed
condition until the terminal shaft travels to a
position just short (1 to 2°) of maximum line
on the dial plate. Readjust the speed-
setting screw if necessary to obtain terminal
shaft position at the required speed.
Simulate an overspeed condition until the
terminal shaft travels to a position just short (1 to
2 ) of the minimum line on the dial plate. At this
point the speed should rise by the amount of
droop percentage. If the speed droop needs to be
increased, move the droop bracket towards the
flyweights. Move the droop bracket away from
the flyweights to decrease droop.
If droop is readjusted, readjust the speed as
required to obtain the desired results.
Removal. Remove the governor/actuator from
the engine as follows:
Disconnect negative terminal cable
from battery. Remove external power.
Disconnect linkage (figure 12-4) on
Disconnect electrical connector on
Disconnect oil line to the governor/actuator.
Remove bolts securing unit to sump. Pull straight
up, and remove unit and gasket.
Replacement. Reinstall or replace unit as follows
(see figure 12-4):
Using a new gasket between the
base of the unit and the mounting pad,
mount the governor/actuator unit on the
mounting pad. Square the unit with the
engine linkage and in line with the drive.
Fit the splined drive shaft into the drive with
a free, slip fit; no tightness is permitted.
Set the unit on the mounting pad of its own
weight without any force being applied.
Also, make allowance for unrestricted oil
flow drainage through the drive shaft bore
and annulus within the base mounting