ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
h.
i.
j.
k.
I.
m.
n.
o.
p.
q.
2-27.3
a.
b.
c.
d.
e.
2-27.4
a.
b.
c.
d.
Set multimeter lo DC volts and connect Positive lead of multimeter, to wire 104C. Connect negative lead of
multimeter to terminal 5 of AC voltage regulator. Start generator set and operate at rated frequency. Move and
hold MASTER SWITCH in START position. Multimeter should indicate approximately 8 VDC.
Shut down generator set.
Set multimeter for AC volts and connect multimeter, to terminals 7 and 8 of AC voltage regulator. Start genera-
tor set and operate at rated frequency. Move and hold MASTER SWITCH in START position. Multimeter
should indicate 67.5 to 90 VAC.
Shut down generator set.
Set multimeter for AC volts and connect multimeter, to terminals 3 and 4 of AC voltage regulator. Start genera-
tor and operate at rated frequency. Move and hold MASTER SWlTCH in START position. Multimeter should
indicate 108 to 132 VAC.
Shut down generator set.
Disconnect wire 156A from terminal 1 of AC voltage regulator. Set multimeter for ohms and connect positive
lead of multimeter, to wire 156A and negative lead to terminal 2 of AC voltage regulator. Move VOLTAGE adjust
potentiometer counterclockwise to STOP position. Multimeter should indicate approximately 0 ohms. Move
VOLTAGE adjust potentiometer clockwise slowly while observing multimeter. Multimeter should increase
smoothly to approximately 5000 ohms.
If steps h, j, I and n are as indicated above, AC voltage regulator is defective and must be replaced.
Connect all wires previously disconnected.
Install control box top panel, paragraph 2-16.4.
Removal.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove control box top cover, paragraph 2-16.1.
Tag and disconnect electrical leads to AC voltage regulator (21, FIGURE 2-11).
Remove screws (20) and AC voltage regulator (21).
Installation.
Install AC voltage regulator (21, FIGURE 2-11) with screws (20).
Connect all electrical leads end remove lags.
Install control box top cover, paragraph 2-16.4.
Connect negative battery cable. Close access door.
2-28 FREQUENCY TRANSDUCER.
2-28.1 Inspection.
a.
Shut down generator set.
b.
Release control panel by turning two fasteners and lower control panel slowly.
c.
Inspect frequency transducer for cracks, burned or broken terminals, corrosion, and other damage.
d.
Raise and secure control panel.
Change 3 2-53
