ARMY TM 9-6115-645-24 AIR FORCE TO 35C2-3-444-12 MARINE CORPS TM 09244A/09245A-24/2 TABLE 4-2.  Voltage Adjustment Range (MEP-816A) Voltage Reconnection Terminal Board Position Adjustment Range 120/208 197-229 volts 240/416 395-458 volts I. 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  0  ohms.    Move VOLTAGE  adjust  potentiometer  clockwise  slowly  while  observing  multimeter.    Multimeter  should  increase smoothly to approximately 20,000 ohms. m. If steps h., j., and I.  are as indicated above.  AC voltage regulator is defective and must be replaced. n. Connect all wires previously disconnected. o. Close output box access door. 4-1.4 Removal. a. Shut down generator set. b. Open battery access door and disconnect negative battery cable. c. Release control panel by turning two fasteners and lower control panel slowly. d. Tag and disconnect AC voltage regulator (2, FIGURE 4-3) electrical leads. e. Remove screws (1) and AC voltage regulator (2). 4-1.5 Installation. CAUTION The components of the AC voltage regulator kit are not Interchangeable.  Ensure the part number of the component to be Installed is the same as the removed component.  Failure to observe this caution will result In equipment damage. a. Install AC voltage regulator (2, FIGURE 4-3) with screws (1). b. Connect electrical leads and remove tags. c. Raise and secure control panel. d. Connect negative battery cable.  Close battery access door. 4-2 SHORT CIRCUIT/OVERLOAD RELAY. 4-2.1 Testing. CAUTION Make sure negative cable Is disconnected prior to removing wires.  Failure to observe this caution could result In equipment damage. a. Remove Short Circuit/Overload Relay (paragraph 2-56-3). b. Install relay in test circuit shown in figure 4-1. c. Set multimeter for ohms and check for open circuits between terminals 5 and 6, 9 and 10.  Check for closed circuits between terminals 7 and 8, 11 and 12.  If relay fails the above test, replace relay.  If relay tests good continue with remainder of test. d. Activate power source G1.  Adjust voltage to 0 volts. e. Place switch S2 in the ’A" position and close S1. f. Slowly increase output voltage of G1 to 6.18 VAC (110% rated load).  Leave G1 at this setting for 10 minutes. Relay should not trip.  Circuits should remain as indicated in step c above. Change 2  4-3