ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-28.2
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2-28.3
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Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove control box top panel, paragraph 2-16.1.
Release control panel by turning two fasteners and lower control panel slowly.
Disconnect wire 154A from positive (+) terminal of FREQUENCY meter (HERTZ).
Set multimeter for DC milliamperes (O to 2 Ma range) and connect positive lead to disconnected wire 154A,
and negative lead to vacant terminal of FREQUENCY meter (HERTZ).
Connect negative battery cable and close access door.
Start generator set and adjust frequency to 60 Hz.
Multimeter indication should be 0.080 to 0.120 Ma.
Adjust frequency to 65 Hz and multimeter indication should be 0.180 to 0.220 Ma.
Shut down generator set.
Replace frequency transducer if readings are other than above.
If no repair is needed, remove multimeter and connect wire 154A to positive (+) terminal of FREQUENCY meter
(HERTZ).
Raise and secure control panel.
Install control box top panel, paragraph 2-16.4.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove control box top panel, paragraph 2-16.1.
Release control panel by turning two fasteners and lower control panel slowly.
Disconnect wire 154A from positive terminal (+) of FREQUENCY meter (HERTZ).
Set multimeter for DC milliamperes (0 to 2 Ma range) and connect positive lead to free end of wire 154A and
connect negative lead to positive terminal (+) of FREQUENCY meter (HERTZ),
Connect negative battery cable and close access door.
Start and operate generator set at rated voltage and adjust frequency to 400 Hz.
Multimeter indication should be 0.090 to 0.110 Ma.
Adjust frequency to 420 Hz. Multimeter indication should be 0.190 to 0.210 Ma.
Shut down generator set.
Replace frequency transducer if readings are other than above.
If no repair is needed, remove multimeter and connect wire 154A to positive terrninal (+) of FREQUENCY meter
(HERTZ).
Raise and secure control panel.
Install control box top panel, paragraph 2-16.4.
2-54
Testing (MEP-803A).
Testing (MEP-813A).
