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REPLACEMENT (cont)
TABLE  4-1.  Voltage  Adjustment  Range  (MEP-805A)

TM-9-6115-644-24 Generator Set Tactical Quiet 15 Kw 50/60-400 Hz MEP-804A (60 Hz) MEP-814A (400 Hz) Manual
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ARMY TM 9-6115-644-24 AIR FORCE TO 35C2-3-446-12 MARINE CORPS TM 09249A/09246A-24/2 CHAPTER   4 DIRECT   SUPPORT   MAINTENANCE   INSTRUCTIONS Section   I.   MAINTENANCE   OF   CONTROL   BOX   ASSEMBLY 4-1    AC VOLTAGE REGULATOR. WARNING High voltage is produced when this generator set is in operation. Improper operation could result in personaI injury or death. 4-1-1 Testing (Regulator, P/N:   112-3055  For MEP-805A Generator Set). a. b. c. d. e. f. g. h. i. j. k. l. m. Shut down generator set. Open output box access door. Note position of voltage reconnection terminal board and set FREQUENCY SELECT switch to 60 Hz position. Start  generator  set  and  turn  VOLTAGE  adjust  potentiometer  to  ensure  the  adjustment  ranges  on  TABLE  4-1  are met, depending on position of voltage reconnection terminal board. Shut down generator set. If no voltage or Iow voltage was indicated, or voltage adjustment range could not be achieved, perform the follow- ing steps. Otherwise, AC voltage regulator (2, FIGURE 4-3) is serviceable. Disconnect wire 141 A from terminal 1 of AC voltage regulator. Set multimeter for DC volts and connect positive lead to wire 141A. Connect negative lead of multimeter to termi- nal 3 of AC voltage regulator. Start generator set and operate at rated frequency. Move and hold MASTER SWITCH in START position. Multimeter should indicate between 4 and 12 VDC. If no voltage, proceed to trou- bleshooting,  Governor  Control  Unit,  paragraph  4-2. Shut down generator set. Isolate wire 141A. Set multimeter for AC volts and connect to terminals 10 and 11 of AC voltage regulator. Start generator set and operate at rated frequency. Move and hold MASTER SWITCH in START position. Multimeter should indicate 280 to 380 VAC. If no voltage or low voltage is indicated in step k above, proceed to troubleshooting the transfomner, paragraph  4-12. Shut down generator set. Disconnect wire 137A from terminal 5 of AC voltage regulator. Set multimeter for ohms and connect positive lead to wire 137A and negative lead to terminal 4 of AC voltage regulator. Move VOLTAGE adjust potentiometer to full counterclockwise position. Multimeter should indicate approximately 3,000 ohms with FREQUENCY SE- LECT switch in 80 Hz position, and approximately O ohms with FREQUENCY SELECT switch in 50 Hz position. Move VOLTAGE adjust potentiometer clockwise slowly while observing multimeter. Multimeter should increase smoothly to approximately 10,000 ohms. Place FREQUENCY Select Switch in 60Hz position. 4-1







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