ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
e.
Connect negative battery cable. Close battery access door.
2-51 AC VOLTAGE REGULATOR.
Inspect AC voltage regulator (36, FIGURE 2-14) for cracked case, broken wires, security, and other damage.
2-52 FREQUENCY TRANSDUCER.
2-52-1
a.
b.
2-52-2
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k
1.
m.
n.
o.
p.
q.
r.
s.
2-52-3
a.
Testing (MEP 815A).
b.
Inspection.
Shut down generator set.
Inspect transducer for cracked casing, burned or broken terminals, and other damage.
Testing (MEP 805A).
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 181 A from positive (+) terminal of FREQUENCY meter (HERTZ).
Set multimeter for DC milliamperes (0 to 2 Ma range) and connect positive lead to disconnected wire 181 A, and
negative lead to vacant terminal of FREQUENCY meter (HERTZ).
Move FREQUENCY SELECT switch to 60 Hz position.
Connect negative battery cable.
Start generator set and adjust frequency to 60 Hz.
Multimeter indication should be between 0.781 and 0.923 DC amps.
Adjust frequency to 62 Hz and multimeter indication should be between 0.875 and 1.125 DC amps.
Move FREQUENCY SELECT switch to 50 Hz position.
Adjust frequency to 50 Hz and multimeter indication should be between 0.071 and 0.213 CD amps.
Adjust frequency to 52 Hz and multimeter indication should be between 0.213 and 0.284 DC amps.
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.
Shut down generator set.
Open battery access door and disconnect negative battery cable.
2-87
