TM 9-4940-549-14&P
EXCITER BOOSTER.
Removal.
Remove exciter booster as illustrated in figure 18-2.
a.
Install the exciter booster as illustrated in figure 18-2.
b.
Installation.
POWER SELECTOR SWITCH.
a.
On-Equipment Test.
(1) Tag and disconnect all leads and jumper wires from the power
selector switch.
(2) Use a multimeter and test for continuity in (3) thru (5) below.
If continuity is not so indicated, replace the power selector
switch.
(3) Turn the power selector switch to the GENERATOR position.
Continuity should be indicated between terminals 1 and 4, 5 and
8, 9 and 12, 13 and 16, 17 and 20, and 21 and 24.
(4) Turn the power selector switch to the CITY position. Continui-
ty should be indicated between terminals 1 and 3, 5 and 7, 9
and 11, 13 and 15, 17 and 19, and 21 and 23.
(5) Turn the power selector switch to the EMERGENCY position.
Continuity should be indicated between terminals 1 and 2, 5 and
6, 9 and 10, 13 and 14, 17 and 18, and 21 and 22.
b.
Removal and Installation. Refer to figure 18-6 for removal and in-
stallation of the power selector switch.
WIRING (CONTROL CUBICLE).
18-7.
a.
General. When disconnecting wiring for maintenance, testing, repair,
or replacement, always tag each wire or terminal for ready identifi-
cation. The control cubicle wiring can be systematically checked out
by reference to the schematic wiring diagrams.
Before performing any maintenance pro-
cedures on the electrical system, see
that all external power is disconnected
from the shop set.
Disconnect both ends of the wire under test. Touch the
b.
Testing.
probes of a multimeter to each end of the wire. If the multimeter
reading indicates an open circuit, replace the wire. Always use a
wire of at least equal size.
