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 TM 5-4120-393-14
4-38.
Mode Selector (Rotary) Switch (S) (cont)
TESTING
Using multimeter and switch position chart, check continuity at contacts indicated. With switch position closed, continuity
should be indicated. With switch position open, no continuity should be indicated. Check between each set of contacts
and at each switch position.
REPLACE
Replace switch if it fails above test or damaged.
INSTALLATION
1.
See tags and wiring diagram, para 4-13, and connect leads.
2.
Slip switch (8) into control box (9) and place shaft through hole.
3.
Using wrench and holding backside of switch, secure switch (8) to box (9) with lock washer (7) and nut (6). Be sure
that switch positions match front plate.
4.
Insert rear panel (5) into box (9) and align holes.
5.
Using screwdriver and wrench, secure rear panel (5) with four screws (3) and nuts (4).
6.
Place knobs (1) on switch shafts and align setscrews with flats on shafts and, using allen wrench, tighten setscrews
(2) in both knobs (1).
NOTE
FOLLOW ON MAINTENANCE:
1. Install control panel. See para 4-35.
2. Connect power.
4-92
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