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 TM 55-1905-223-24-18-1
2-48.
Repair Sequential Timer.
a. Disassembly, b. Repair, c. Assembly.
This task covers:
INITIAL SETUP
Equipment Condition
Tools
Electrical power supply turned OFF,
Tool kit, general mechanic's,
at emergency power EL-102 and
switch tagged "Out of Service -
T o o l kit, electrician's,
Do Not Operate."
Sequential timer removed (para. 2-47).
Materials/Parts
Control cam P/N P250-2
Panel assembly P437-4
Rotary switch P/N P268-1
Motor P/N P252-12
Switch P/N P253-5
Alternating current relay P/N P254-4
Warning tag, Item 1, Appendix C
DISASSEMBLY
Remove switch knob (8) from shaft.
a.
Remove plain hexagon nut (9).
b.
Remove switch plate (10).
c.
Remove rotary switch (11).
d.
Remove machine screws (6) and lockwashers (7).
e.
f.
Remove motor (5).
Remove machine screws (2) and lo&washers (3).
g.
Remove switch (1).
h.
Repeat step g. and h. for remaining two switches.
i.
Remove machine screws and lockwashers.
j.
Remove alternating current relay (4).
k.
2-283
Change 1
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