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 TM 5-4120-393-14
4-49. Transformer (T) (cont)
TESTING
1.
Connect the probes of a continuity tester or a multimeter set on the lowest OHMS scale to terminal studs H1 and H2.
If the primary winding is open, replace the transformer.
2.
Connect the probes of a continuity tester or a multimeter set on the lowest OHMS scale to terminal studs X1 and X2.
If the secondary winding is open, replace the transformer.
3.
Connect one probe of a multimeter set on high OHMS scale to either terminal stud H1 or H2 and the other probe to
the transformer case. If resistance is less than 500,000 ohms, replace the transformer.
4.
Connect one probe of a multimeter set on high OHMS scale to either terminal stud X1 or X2 and the other probe to
the transformer case. If resistance is less than 500,000 ohms, replace the transformer.
5.
Connect one probe of a multimeter set on high OHMS scale to either terminal stud H1 or H2 and the other probe to
either terminal X1 or X2. If resistance is less than 500,000 ohms, replace the transformer.
INSTALLATION
1.
Position transformer (5) on transformer bracket and secure with four washers (4) and nuts (3).
2.
See tags and wiring diagram, para 4-13, and connect leads. When installing terminal lugs on transformer terminals,
hold bottom nut with wrench while tightening outer nuts.
3.
Using screwdriver, install cover (2) with eight screws (1).
NOTE
FOLLOW ON MAINTENANCE:
1. Install junction box number two. See para 4-46.
2. Connect power.
4-116
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