TM 1-4920-440-13&P
FIELD MAINTENANCE
PRODUCTION/QUALITY CONTROL SHOP
MAINTENANCE INSTRUCTIONS FOR CIRCUIT BREAKERS
INITIAL SETUP:
Personnel Required
Tools and Special Tools
CMF 15 Series (1)
Electrical Repairers Tool Kit
Equipment Condition
(WP 0063 00, Table 2, Item 103 )
Functional
Multimeter (WP 0063 00, Table 2, Item 106 )
WARNING
HIGH VOLTAGE exists in electrical system of shop. All electrical inspections, repairs, or
replacements will be performed with power OFF and only by a qualiied electrician. Serious
shock hazards exist which could result in INJURY OR EVEN DEATH to personnel.
NOTE
During installation of components, same hardware should be used so as to maintain integrity of
shop set.
INSPECTION OF INSTALLED ITEMS
Inspect circuit breakers for any apparent damage.
TEST AND INSPECTION
1.
Move all circuit breakers to the OFF position and tag.
NOTE
This procedure covers obsolete NQOB circuit breaker panel and new NQOD circuit
breaker panel. These units are distinguishable by nameplates attached to panel boards.
The following steps, Steps 2 through 3, pertain to NQOB model circuit breaker panels only.
2.
Loosen four captive screws and move clamp ingers to open position.
3.
Lift circuit breaker panel cover from panel board.
4.
Remove four screws and four washers then lift panel board from circuit breaker box on both models.
0051 00-1