ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
2-35 FREQUENCY ADJUST POTENTIOMETER.
2-35.1
a.
b.
2-35.2
a.
b.
c.
d.
e.
f.
g.
2-35.3
a.
b.
c.
d.
e.
f.
g.
2-35.4
a.
b.
c.
d.
e.
f.
Inspection.
Shut down generator set.
Inspect potentiometer for loose connections and mounting, and other damage.
Removal.
Shut down generator set.
Open battery access door and disconnect negative battery cable,
Release control panel by turning two fasteners and lower control panel slowly.
Tag and disconnect FREQUENCY adjust potentiometer (19, FIGURE 2-13) electrical leads using soldering
gun. Remove shrinkable tubing.
Remove set screws (15) and knob (16).
Remove nut (17) and washer (18).
Remove FREQUENCY adjust potentiometer (19) from control panel.
Testing.
Remove FREQUENCY adjust potentiometer, paragraph 2-35.2.
Set multimeter for ohms and connect across outer terminals of potentiometer (19). Multimeter should indicate
between 4500 and 5500 ohms resistance.
Rotate potentiometer shaft counterclockwise as far as it will go.
Connect multimeter between center terminal and either outer terminal. Multimeter should indicate zero ohms
resistance.
Slowly, at an even rate, rotate the potentiometer shaft clockwise as far as it will go. Multi meter should increase
at an even rate from 0 to 5000 ohms.
If multimeter indication changes erratically or is not between 4500 and 5500 ohms when the rotation is com-
pleted, the potentiometer is defective and must be replaced.
Install FREQUENCY adjust potentiometer, paragraph 2-35.4.
Insert FREQUENCY adjust potentiometer (19, FIGURE 2-13) into control panel.
Installation.
Install washer (18) and nut (17).
Install knob (16) and set screws (15).
Install new shrinkable tubing, solder leads, and remove tags.
Raise and secure control panel.
Connect negative battery cable. Close battery access door.
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