ARMY TM 9-6115-641-24
AIR FORCE TO 35C2-3-456-12
2-30. OVERVOLTAGE RELAY.
2-30-1. Inspection.
a.
Shut down generator set.
b. Release control panel by turning two fasteners and lower control panel slowly.
c.
Inspect overvoltage relay for cracks, burned or broken terminals, corrosion, and other damage.
d.
Raise and secure control panel.
2-30-2. Testing.
a.
b.
c.
d.
e.
f.
g.
h.
i.
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.
CAUTlON
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 OVER
VOLTAGE lamp on malfunction indicator panel should light, If this does not occur immediately, shut down
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.
2-30-3. Removal.
a.
Shut down generator set.
b. Open left side engine access door and disconnect negative battery cable.
c.
Remove control box top panel, paragraph 2-16-1.
d.
Tag and disconnect overvoltage relay (30, Figure 2-11) electrical leads.
e.
Open load terminal board access door to gain access and remove screws (28), nuts (29), and overvoltage relay
(30).
2-30-4. Installation.
a.
Install overvoltage relay (30, Figure 2-11) with screws (28) and nuts (29).
b. Connect electrical leads and remove tags.
c.
Install control panel top cover, paragraph 2-16-4.
d.
Connect negative battery cable. Close access doors.
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