ACTUATOR UNIT.

Table 3-7. Electric Governor Malfunction Testing

Section IX. MAINTENANCE OF INTERCONNECTING WIRING HARNESSES

TM-9-6115-464-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 15 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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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. NOTE 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. a. Removal (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 self–locking nut (6). NOTE 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. b. Testing. (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. c. InstaIlation. (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). 3-191

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