(14) Turn the control unit frequency adjust
(2) Check for short circuit between each pin
screw clockwise until the proper engine speed is
on the connector and the housing. Replace actuator
obtained. Several turns may be required. The
if any pin is shorted to case.
sufficient adjustment travel to cause the generator
set frequency meter to indicate beyond both of its
extreme limits (388-412 Hz).
(1) Using an ohmmeter, test for continui-
between pins A and B on the connector.
(15) If the engine is unstable as indicated
by continuous movement of the actuator lever, turn
(2) If the circuit is open discard the magne-
the control unit gain control counterclockwise
until stability is obtained as indicated by a
stationary actuator lever. Readjust the control
unit frequency adjust screw to the proper engine
(1) Rotate the engine mtil the' top land of
one gear tooth is in line with the center of the
(16) Turn the control unit gain control clock-
threaded hole in the flywheel housing.
wise until the engine becomes just unstable; back
the gain control counterclockwise until the engine
(2) Replace the magnetic pickup (3) into the
is again stable.
threaded hole in the flywheel housing until the
tip contacts the top of the gear tooth. Back the
(17) Turn the control unit stability control
magnetic pickup out one-half to three-quarter turn
clockwise until the engine becomes just unstable;
and secure with the locknut (5) provided.
back the stability control countercloclcwise until
the engine is again stable.
(3) Connect electrical connector P23 (1).
The governor is now set to a nominally
good operating point.
(1) Position the actuator lever (12, figure
4-30.3) roughly horizontal
the nut on
the splined shaft end of the actuator lever, rotat-
(18) Adjust control unit gain, stability and
ing the lever and tightening the nut.
frequency under various load conditions and load
changes to obtain the desired gwerning character-
(2) Align the actuator with the two holes In
the actuator bracket, secure the actuator to the
actuator bracket with two 3/4-inch long hex head
(19) When the el&tric governor system is
screws (8), flatwashers (9), lock washers (10) and
properly adjusted, the locknuts on the control unit
gain and stability controls should be tightened.
4-7.2 ACTUATOR UNIT.
If the actuator bracket has not been
removed, proceed with paragraph (3). If
the bracket must be installed, proceed
(1) Disconnect electrical connector P22, (1,
(a) Insert the spacers (7) through the
(2) Disconnect the actuator lever from the
actuator linkage rod by removing the hex head cap
screw (2), flatwasher (3), and the self-locking
(b) Secure the actuator bracket to the
engine by inserting the two 1 l/2-inch long hex
propriate holes in the actuator bracket, through
the spacers (7) and into the threaded holes in
It may be necessary to remove the actuator
the engine; tighten the two screws.
bracket to gain access to the hardware
securing the actuator to the actuator
(c) Adjust the drive belt of the engine
bracket. If this is not necessary, proceed
to paragraph (3). If removal is required,
then proceed as follows:
(3) Attach the actuator lever to the actuator
(a) Loosen the drive belt of the engine
linkage rod with the 1 1/4-inch long hex head cap
screw (2), two flatwashers (3) and the self-locking
(b) Remove the two hex head screws (5) and
lock washers (6) securing the actuator bracket.
(4) Connect electrical connector P22 (1).
through spacers (7), to the engine through the
4-7.3 ELECTRIC GOVERNOR MAGNETIC PICKUP.
(3) Disconnect the actuator from the actuator
bracket by removing two hex head screws (8), flat-
(1) Disconnect electrical connector P23 (1,
Remove the actuator.
(2) Loosen locknut (2) and unscrew the
threaded magnetic pickup from the flywheel housing
(3). Remove the magnetic pickup.
between pins A and B and pins C and D. Replace