ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
(15) If the engine is unstable as indicated by continuous movement of the actuator lever, turn 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 speed.
(16) Turn the control unit gain control clockwise until the engine becomes just unstable; back the gain
control counterclockwise until the engine is again stable.
(17) Turn the control unit stability control clockwise until the engine becomes just unstable; back the
stability control counterclockwise until the engine is again stable.
The governor is now set to a nominally good operating point.
(18) Adjust control unit gain, stability and frequency under various load conditions and load changes to
obtain the desired governing characteristics.
(19) When the electric governor system is properly adjusted, the locknuts on the control unit gain and
stability controls should be tightened.
3-66. ACTUATOR UNIT.
(1) Disconnect electrical connector P22, (1, figure 3-87).
(2) Disconnect the actuator lever (2) from the actuator linkage rod (3) by removing the hex head cap
screw (4), flatwasher (5) and the selflocking nut (6).
It maybe necessary to remove the actuator bracket to gain access to the hardware
securing the actuator to the actuator bracket. If this is not necessary, proceed to
paragraph (3). If removal is required, then proceed as follows:
(a) Loosen the drive belt of the engine alternator.
(b) Remove the two hex head screws (7), Iockwashers (8), and spacers (9) securing the actuator
bracket (10) to the engine through the alternator mounting bracket (11).
(3) Disconnect the actuator (12) from the actuator bracket (10) by removing two hex head screws (13),
flatwashers (14), lock-spring washers (15) and nuts (16). Remove the actuator.
(1) Using an ohmmeter, check for continuity between pins A and B and pins C and D. Replace actuator if
there is no continuity.
(2) Check for short circuit between each pin on the connector and the housing. Replace actuator if any
pin is shorted to case.
(1) Position the actuator level (2, figure 3-88) roughly horizontal by loosening the nut on the splined
shaft end of the actuator lever, rotating the lever and tightening the nut.
(2) Align the actuator with the two holes in the actuator bracket (10), secure the actuator to the actuator
bracket with two hex head screws (13), flatwashers (14), lock-spring washers (15) and nuts (16).