ARMY *TM 9-6115-464-34 AIR FORCE TO-35C2-3 ... - Igor Chudov

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ARMY TM 9-6115-464-34AIR FORCE 35C2-3-445-2NAVY NAVFAC P-8-624-34Table 3-7. Electric Governor Malfunction TestingPROBABLE CAUSE OFTERMINAL NORMAL NON-NORMAL READING CORRECTIVE ACTIONS 1.0 volt AC-RMS 1. Defective magnetic pickup.minimum while cranking. 2. Gap too large betweenmagnetic pickup and gearteeth.3. Improper or defective wiringto the magnetic pickup.KLN10.1±.20 volts DC while 1. DC power not connected orenergized (Internal low battery voltage.regulated D.C. supply). 2. Frequency trim potentiometershorted, grounded ormiswired.3. Wiring error.4. Defective control unit.Above 5.1 volts DC while 1. Frequency adjust set too low.running. (inverse speederror signal).2. Defective control unit.Above 5.1 volts is underspeed signal. Below 5.1volts is over speed signal.On speed will indicate asteady 5.1 volts.8.5 to 9.5 volts DC while 1. Battery voltage maybe toocranking. (Proportional low while cranking.actuator voltage). 2. Defective control unit.R 2.5 volts DC maximum 1. Output transistor open (defec–while cranking. (Tran- tive control unit).sister voltage).2. Defective actuator.3. Error in wiring to actuator.1. Replace magnetic pickup.2. Readjust magnetic pickup.3. Replace wiring harness.1. Connect DC power supply;replace DC battery.2. Replace control unit.3. Replace wiring harness.4. Replace control unit.1. Turn frequency adjustscrew clockwise.2. Replace control unit.1. Charge DC battery; replaceDC battery.2. Replace control unit.1. Replace control unit.2. Replace actuator.3. Replace wiring harness.NOTETwo people will be required to adjust the control unit. Ensure that the actuator linkagerod and all levers are securely fastened and move freely (without binding) beforeoperating the engine. Manually overcome the actuator until adjustment of the controlunit is completed and the governor is in control. Adjustment of the control unit will bemade with the engine operating in a no–load condition.(13)(14)Start the engine, manually operating the fuel shutoff lever.Turn the control unit frequency adjust screw clockwise until the proper engine speed is obtained.Several turns may be required. The generator set frequency adjust pot should now have sufficientadjustment travel to cause the generator set frequency meter to indicate beyond both of its extremelimits (388-412 Hz).3-190
ARMY TM 9-6115-464-34AIR FORCE TO 35C2-3-445-2NAVY NAVFAC P-8-624-34(15) If the engine is unstable as indicated by continuous movement of the actuator lever, turn the controlunit gain control counterclockwise until stability is obtained as indicated by a stationary actuatorlever. 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 gaincontrol counterclockwise until the engine is again stable.(17) Turn the control unit stability control clockwise until the engine becomes just unstable; back thestability control counterclockwise until the engine is again stable.NOTEThe 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 toobtain the desired governing characteristics.(19) When the electric governor system is properly adjusted, the locknuts on the control unit gain andstability 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 capscrew (4), flatwasher (5) and the self–locking nut (6).NOTEIt maybe necessary to remove the actuator bracket to gain access to the hardwaresecuring the actuator to the actuator bracket. If this is not necessary, proceed toparagraph (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 actuatorbracket (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 ifthere is no continuity.(2) Check for short circuit between each pin on the connector and the housing. Replace actuator if anypin is shorted to case.c. InstaIlation.(1) Position the actuator level (2, figure 3-88) roughly horizontal by loosening the nut on the splinedshaft 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 actuatorbracket with two hex head screws (13), flatwashers (14), lock-spring washers (15) and nuts (16).3-191
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(c)(d)(e)Pull all slack from the le
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REPAIR INSTRUCTIONSARMY TM 9-6115-4
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ARMY *TM 9-6115-464-34 AIR FORCE TO-35C2-3 ... - Igor Chudov

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