4-34
TM 9-2330-238-14
4-24. BLACKOUT LIGHT ELECTROMAGNETIC RELAY REPLACEMENT.
This Task Covers:
a.
Removal
b.
Installation
Initial Setup:
Equipment Conditlons:
Materials/Parts:
l External power supply cable disconnected.
l Marker tags (item 15, Appendix E)
l Circuit breakers removed (para 4-23).
l Three lockwashers
Tools/Test Equipment:
. General mechanic’s tool kit
NOTE
All blackout Iight electromagnetic relays are replaced In the same manner.
a.
REMOVAL
NOTE
. To remove M313 (Late Model), M447, M447C, or M750 blackout light electro-
magnetic relay, perform steps 1 and 2.
l TO remove M313 (Early Model) blackout light electromagnetic relay, perform steps 1
and 3.
1.
Disconnect and tag electrical leads (2) from blackout light electromagnetic relay (5).
2.
Remove two screws (3) and blackout light electromagnetic relay (5) from circuit breaker junction box (l).
3.
Remove three screws (3), lockwashers (4) and blackout light electromagnetic relay (5) from circuit breaker
junction box (l). Discard lockwashers.
b.
INSTALLATION
NOTE
• TO install M313 (Late Model), M447, M447C, or M750 blackout light electromagnetic
relay, perform steps 1 and 3.
• install M313 (Early Model) blackout light electromagnetic relay, perform steps 2
and 3.
1.
Position blackout light electromagnetic relay (5) in place in circuit breaker junction box (1 ) and secure with two
screws (3).
