ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
4-1.2
Testing. (Regulator. P/N: 19880-002 For MFP-806A Generator Set).
a.
Shut down generator set.
b.
Open output box access door.
c.
Note position of voltage reconnection terminal board and set FREQUENCY SELECT switch to 60 Hz position.
d.
Start generator set and turn VOLTAGE adjust potentiometer to ensure the adjustment ranges on TABLE 4-1
are met, depending on position of voltage reconnection terminal board.
e.
Shut down generator set.
f.
If no voltage or low voltage was indicated, or voltage adjustment range could not be achieved, perform the
following steps. Otherwise, AC voltage regulator (2, FIGURE 4-3) is serviceable.
g.
Disconnect wire 141 A from terminal 1 of AC voltage regulator.
h.
Set multimeter for DC volts and connect positive lead to wire 141A. Connect negative lead of multimeter to
terminal 3 of AC voltage regulator. Start generator set and operate at rated frequency. Move and hold
MASTER SWITCH in START position. Multimeter should indicate between 4 and 12 VDC.
i.
Shut down generator set. Isolate wire 141 A.
j.
Set multimeter for AC volts and connect to terminals 10 and 11 of AC voltage regulator. Start generator set
and operate at rated frequency. Move and hold MASTER SWITCH in START position. Multimeter should
indicate 110 to 160 VAC.
k.
Shut down generator set.
I.
Disconnect wire 137A from terminal 5 of AC voltage regulator. Set multimeter for ohms and connect positive
lead to wire 1 37A and negative lead to terminal 4 of AC voltage regulator. Move VOLTAGE adjust
potentiometer to full counter clockwise position. Multimeter should indicate no more than 2 ohms with
FREQUENCY SELECT switch in 60 Hz position or 50 Hz position. Move VOLTAGE adjust potentiometer
clockwise slowly while observing multimeter. Multimeter should increase smoothly to approximately 20,000
ohms.
m.
If steps h., j., and I. are as indicated above, AC voltage regulator is defective and must be replaced.
n.
Connect all wires previously disconnected.
o.
Close output box access door.
4-1.3
Testing. (Regulator. P/N: 19890-003 For MFP-816A Generator Set).
a.
Shut down generator set.
b.
Open output box access door.
c.
Note position of voltage reconnection terminal board.
d.
Start generator set and turn VOLTAGE adjust potentiometer to ensure the adjustment ranges on TABLE 4-2
are met, depending on position of voltage reconnection terminal board.
e.
Shut down generator set.
f.
If no voltage or low voltage was indicated, or voltage adjustment range could not be achieved, perform the
following steps. Otherwise, AC voltage regulator (2, FIGURE 4-3) is serviceable.
g.
Disconnect wire 141 A from terminal 1 of AC voltage regulator.
h.
Set multimeter for DC volts and connect positive lead to wire 141A. Connect negative lead of multimeter to
terminal 3 of AC voltage regulator. Start generator set and operate at rated frequency. Move and hold
MASTER SWITCH in START position. Multimeter should indicate between 4 and 12 VDC.
i.
Shut down generator set. Isolate wire 141 A.
j.
Set multimeter for AC volts and connect to terminals 10 and 11 of AC voltage regulator. Start generator set
and operate at rated frequency. Move and hold MASTER SWITCH in START position. Multimeter should
indicate 110 to 160 VAC.
k.
Shut down generator set.
4-2 Change 2
