ARMY TM 9-8115-842-24
AIR FORCE TO 35C2-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-30.1
a.
b.
c.
d.
2-30.2
a.
b.
c.
d.
e.
f.
g.
h.
i.
2-30.3
a.
b.
c.
d.
e.
2-30.4
a.
b.
c.
d.
Shut down generator set.
Release control panel by turning two fasteners and lower control panel slowly.
Inspect overvoltage relay for cracks, burned or broken terminals, corrosion, and other damage.
Raise and secure control panel.
Testing.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Release control panel by turning two fasteners and lower control panel slowly.
The following procedure disables AC voltage regulator and allows generator to
reach an overvoltage condition. Do not allow generator set to operate for an ex-
tended period of time in an extreme overvoltage condition.
Disconnect wire 006M from AC voltage regulator, terminal 3, and insulate wire end.
Connect negative battery cable and close access door.
Start generator set. As generator accelerates to rated speed, it should instantly shut down and the OVERVOL-
TAGE lamp on malfunction indicator panel should light. If this does not occur immediately, shutdown generator
set.
Replace overvoltage relay if generator set does not operate as above.
If no repair is needed, reconnect wire 006M to terminal 3 of AC voltage regulator.
Raise and secure control panel.
Removal.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove control box top panel, paragraph 2-16.1.
Tag and disconnect overvoltage relay (30, FIGURE 2-11) electrical leads.
Open load terminal board access door to gain access to nuts (29) and remove screws (28), nuts (29), and over-
voltage relay (30).
Installation.
Install overvoltage relay (30, FIGURE 2-11) with screws (28) and nuts (29).
Connect electrical leads and remove tags.
Install control panel top cover, paragraph 2-16.4.
Connect negative battery cable. Close access doors.
2-56
2-30 OVERVOLTAGE RELAY.
Inspection.
