TM 5-4520-256-14
3-19.
CIRCUIT BREAKER (CB1) MAINTENANCE.
This task covers:
a.
Removal
b.
Inspection
c.
Cleaning
d.
Testing
e.
Installation
INITIAL SETUP:
Tools Required:
Tool Kit, General Mechanics
Multimeter
Materials Required:
Cleaning Solvent (Item 11, Appendix E)
WARNING
Cleaning solvent, Federal specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use in excessive amounts. Avoid skin contact.
Equipment Conditions:
Heater unit shut down and cool.
Power cable disconnected from power source.
Access door removed (para 3-10a).
a.
Removal.
(1)
Tag and disconnect two wires from rear of circuit breaker (3).
(2)
Remove two nuts (5), two lockwashers (4), and two screws (2).
(3)
Remove circuit breaker (3) from control panel (1).
Change 3 3-52
