ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
2-52.3
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
252.4
a.
b.
c.
d.
e.
252.5
a.
b.
c.
d.
Shut down generator set.
Open battery access door and disconnect negative battery cable.
Remove control box top panel, paragraph 2-15.1.
Release control panel by turning two fasteners and lower control panel slowly.
Disconnect wire 181A from positive terminal (+) of FREQUENCY meter (HERTZ).
Set multimeter for DC milliamperes (O to 2 Ma range) and connect positive lead to free end of wire 181 A and
connect negative lead to positive terminal (+) of FREQUENCY meter (HERTZ).
Connect negative battery cable.
Start and operate generator set at rated voltage and adjust frequency to 400 Hz.
Multimeter indication should be between 0.229 and 0.271 Ma.
Adjust frequency to 412 Hz. Multimeter indication should be between 0.479 and 0.521 Ma.
Shut down generator set.
Replace frequency transducer if readings are other than above.
If no repair is needed, remove multimeter and connect wire 181A to positive terminal(+) of FREQUENCY meter
(HERTZ).
Raise and secure control panel.
Install control box top panel, paragraph 2-15.4.
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 frequency transducer (38, FIGURE 2-1 4) electrical leads.
Remove screws (37) and frequency transducer (38).
Install frequency transducer (38, FIGURE 2-14) with screws (37).
Connect all electrical leads and remove tags.
Install control box top panel, paragraph 2-15.4.
Connect negative battery cable. Close battery access door.
253 KILOWATT TRANSDUCER.
253.1
a.
b.
Inspection.
Shut down generator set.
Inspect transducer for cracked, casing, burned or broken terminals, and other damage.
2-82
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