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TM 9-4110-257-14
4-37.
PUSH SWITCHES S9 AND S10 TESTING AND REPLACEMENT.
This task covers:
a.
Testing
b.
Removal
c.
Installation
INITIAL SETUP:
Tools:
Equipment Conditions:
Heat Gun
Refrigeration unit shut down (para 2-7) and battery
3, Section III, Appendix B
disconnected (para 4-35).
Both side condenser doors open.
Materials/Parts:
Self Locking Nuts (2 Each Push Switch)
General Safety Instructions:
8, Appendix G
WARNING
Sleeving Insulation (1 Each Push Switch)
1, Figure F-23, Appendix F
Exposed rotating parts are used in the
Sleeving Insulation (1 Each Push Switch)
refrigeration unit. Personal injury can result if
Sleev2, Figure F-23, Appendix F
battery is connected.
2, Figure F-23, Appendix F
Marker tags (4)
7, Appendix E
a.
Testing.
(1)
Remove sleeving insulation (1).
(2)
Tag and disconnect wire leads (2).
(3)
Using multimeter set to measure continuity, check push switch (3) contact continuity across
terminals C and NO with the push button switch out and pushed in. Continuity should only be indicated with the
switch pushed in. If continuity was not indicated when switch was pushed in or was indicated with switch out,
replace push switch.
NOTE
Smaller diameter sleeving insulation must go over wire lead connecting to
push switch terminal C.
(4)
If no failure was indicated, install insulation sleeving (1) over wire leads (2).
(5)
Using tags and wiring diagram (fig. 1-4), connect wire leads (2). Remove tags.
4-93
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