ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
a. Shutdown generator set.
b. Open battery access door and disconnect negative battery cable.
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.
Remove screws (1) and AC voltage regulator (2).
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.
Install AC voltage regulator (2, FIGURE 4-3) with screws (1).
b. Connect electrical leads and remove tags.
Raise and secure control panel.
d. Connect negative battery cable. Close battery access door.
4-2 SHORT CIRCUIT/OVERLOAD RELAY
Make sure negative battery cable is disconnected prior to removing wires. Failure to ob-
serve this caution could result in equipment damage.
Remove short circuit/overload relay, paragraph 2-56-3.
b. Install relay in test circuit (FIGURE 4-?)
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.
Place switch S2 in the A position and close S1.
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.
g. Set multimeter for OHMS and check across terminals 5 and 6 while slowly increasing output voltage of G1 to
7.30 VAC (130% rated load). The relay should trip within 8+/- 2 minutes. When relay trips circuit 5 and 6 should
close, circuit 7 and 8 should open.