TM 9-4940-549-14&P
c.
Installation.
Install the DC ampere adjusting rheostat as illustrated
in figure 18-6.
Remove the frequency meter as illustrated in figure 18-6.
a.
Removal.
b.
Cleaning and Inspection.
(1) Clean the frequency meter with a clean, dry, lint-free cloth.
(2) Inspect for damage and for loose terminals. Replace a defective
frequency meter.
Install the frequencv meter as indicated in figure 18-6.
c.
Installation.
.
On-Equipment Testing.
a.
(1) Tag and disconnect electrical leads from the frequency switch.
(2) Place switch in the 50-hertz position.
(3) Use a low-voltage test lamp circuit or a multimeter and test
between the right upper terminal and its corresponding center
terminal, Continuity should be indicated. Test between center
and lower terminals. Continuity should not be indicated. Re-
peat this test on the upper left terminal.
(4) Place switch in the 60-hertz position and repeat the test in (3)
above testing between the bottom and center terminals for conti-
nuity. Replace a defective switch.
b.
Removal.
Remove the frequency switch as illustrated in figure 18-6.
c.
Cleaning and Inspection.
( 1 ) Clean the switch with a clean, lint-free cloth.
(2) Inspect for defects and loose terminals and replace a defective
frequency switch.
Install the frequency switch as illustrated in figure
d.
Installation.
18-6.
a.
Remove the circuit breakers as illustrated in figure 18-6.
Removal.
