ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-48.1
a.
b.
c.
d.
2-48.2
a.
b.
c.
d.
e.
f.
g.
h.
2-48.3
a.
b.
c.
d.
e.
f.
g.
2-48.4
a.
b.
c.
d.
e.
f.
Inspection.
Shut down generator set.
Release control panel by turning two fasteners and lower control panel slowly.
Inspect VOLTAGE adjust potentiometer for loose connections and mounting, corrosion, and other damage.
Raise and secure control panel.
Testing.
Remove VOLTAGE adjust potentiometer, paragraph 2-48.3.
Set multimeter for ohms and connect across two outer terminals of VOLTAGE adjust potentiometer. Indication
shall be 5000 ohms.
Rotate potentiometer shaft counterclockwise as far as it will go.
Connect multimeter between center terminal and either outer terminal.
Slowly, at an even rate, rotate potentiometer shaft clockwise as far as it will go while observing multimeter.
Multimeter indication shall increase, at an even rate, from 0 to 5000 ohms.
If multimeter indication changes erratically or is not 5000 ohms when rotation is complete, VOLTAGE adjust
potentiometer is defective and must be replaced.
If not defective, install VOLTAGE adjust potentiometer, paragraph 2-48.4.
Removal.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Release control panel by turning two fasteners and lower control panel slowly.
Tag and disconnect VOLTAGE adjust potentiometer (47, FIGURE 2-14) electrical leads using solder gun. Re-
move shrinkable tubing.
Remove setscrews (43) and knob (44).
Remove nut (45) and washer (46).
Remove VOLTAGE adjust potentiometer (47) from control panel.
Insert VOLTAGE adjust potentiometer (47, FIGURE 2-14) into control panel.
Install washer (46) and nut (45).
Install knob (44) and setscrews (43).
Connect electrical leads and remove tags.
Raise and secure control panel.
Connect negative battery cable and close access door.
2-76
2-48 VOLTAGE ADJUST POTENTIOMETER.
Installation.
