f.
g.
h.
i.
j.
k.
1.
2-55-3
a.
b.
c.
d.
e.
2-55-4
a.
b.
c.
d.
ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
Start generator set. As generator accelerates to rated speed, it should instantly shutdown and the OVERVOL-
TAGE lamp on malfunction indicator panel should light. If this does not occur immediately shutdown generator
set.
Reconnect wire 137A and disconnect wire 141 A from AC voltage regulator, terminal 1. Insulate wire end.
Start generator set. As generator accelerates to rated speed, the UNDER VOLTAGE Iampon malfunction indica-
tor should light. Move AC CIRCUIT INTERRUPTER switch to CLOSED position. AC circuit interrupter relay
should not dose.
Shut down generator set.
Replace over/under voltage relay if generator set does not operate as above.
If no repair is needed, reconnect wire 141A at AC voltage regulator.
Raise and secure control panel.
Removal.
Shut down generator set.
Open battery access door and disconnect negative battery cable.
Remove control box top panel, paragraph 2-15-1.
Tag and disconnect over/under voltage relay (45, FIGURE 2-14) electrical leads.
Remove screws (44) and over/under voltage relay (45).
Installation.
Install over/under voltage relay (45, FIGURE 2-14) with screws (44).
connect electrical leads and remove tags.
Install control box top panel, paragraph 2-15-4.
Connect negative battery cable. Close battery access door.
2-56-1 Inspection.
2-56 SHORT CIRCUIT/OVERLOAD RELAY.
a. Shut down generator set.
b. Inspect relay for cracked casing, burned or broken terminals, and other damage.
2-56-2 Testing.
CAUTION
Make sure battery cable is disconnected prior to removing wires. Failure to observe this
caution could result in equipment damage.
a. Tag and remove all wires from terminals 5 through 12.
b. Set multimeter for ohms and check for open circuits between terminals 5 and 6, 9 and 10. Check for dosed cir-
cuits between terminals 7 and 8, 11 and 12. Replace any relay which fails the above still exists, notify next high
level of maintenance.
2-91
