TM 9-4910-663-34
(2)
Remove the panel retaining hardware from the sides and front of the control panel.
(3)
Raise the control panel and secure it in the up position with the toggle bolt.
(4)
Disconnect wiring from the terminals of the circuit breaker that is to be replaced.
(5)
Remove the circuit breaker retaining nut.
(6)
Remove the circuit breaker from the control panel.
(7)
Reverse the procedures of steps (1) through (6) to install the replacement circuit breaker.
d.
Removal and Replacement of Indication, Lamps.
(1)
Disconnect main power from the test stand.
(2)
Unscrew the lens cap from the indicator light assembly.
(3)
Press the indicating lamp down while twisting it to the left, and remove the indicating lamp from the
indicator light assembly.
(4)
Reverse the procedures of steps (1) through (3) to install the replacement indicating lamp.
e.
Removal and Replacement of Field Rheostats (R26 and R27).
(1)
Disconnect main power from the test stand.
(2)
Remove the panel retaining hardware from the sides and front I of the control panel. Remove the field
rheostat knob.
(3)
Raise the control panel and secure it in the up position with the toggle bolt.
(4)
Disconnect wiring from the terminals of the field rheostat that is to be replaced.
(5)
Remove the rheostat retaining hardware.
(6)
Remove the field rheostat from the control panel.
(7)
Reverse the procedures of steps (1) through (6) to install the replacement field rheostat.
f.
Removal and Replacement of Load Rheostat (R32).
(1)
Disconnect main power from the test stand.
Change 1 3-15
