ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
2-34 VOLTAGE ADJUST POTENTIOMETER.
2-34.1 Inspection.
a.
Shut down generator set.
b. Inspect potentiometer for loose connections and mounting, and other damage.
2-34.2 Removal.
a.
Shut down generator set.
b. Open battery access door and disconnect negative battery cable.
c.
Release control panel by turning two fasteners and lower control panel slowly.
d. Tag and disconnect VOLTAGE adjust potentiometer (14, FIGURE 2-13) rheostat electrical leads using solder-
ing gun. Remove shrinkable tubing.
e.
Remove set screws (10) and knob (11).
f.
Remove nut (12) and washer (13).
g.
Remove VOLTAGE adjust potentiometer (14) from control paneI.
2-34.3 Testing.
a.
Remove VOLTAGE adjust potentiometer, paragraph 2-34.2.
b. Set multimeter for ohms and connect across two outer terminals of potentiometer (14). Indication shall be:
10,000 ohms (Part number RV4NAYSD103A installed).
20,000 ohms (Part number RV4NAYSD203A installed).
c.
Rotate potentiometer shaft counterclockwise as far as it will go.
d. Connect multimeter between center terminal and either outer terminal.
e.
Slowly, at an even rate, rotate potentiometer shaft clockwise as far as it will go while observing multimeter.
f.
Multimeter indication shall increase, at an even rate, as follows:
0 to 10,000 ohms (Part number RV4NAYSD103A installed).
0 to 20,000 ohms (Part number RV4NAYSD203A installed).
g.
If multimeter indication changes erratically or is not at maximum ohms when rotation is complete, the poten-
tiometer is defective and must be replaced.
h. Install VOLTAGE adjust potentiometer, paragraph 2-34.4.
2-34.4 Installation.
a.
Insert VOLTAGE adjust potentiometer (14, FIGURE 2-13) into control panel.
b. Install washer (13) and nut (12).
c.
Install knob (11) and set screws (10).
d.
Install new shrinkable tubing and connect electrical leads using soldering gun. Remove tags.
e.
Raise and secure control panel.
f.
Connect negative battery cable. Close battery access door.
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