TM 9-4110-256-14
4-34.
PUSH SWITCHES S6 AND S7 TESTING AND REPLACEMENT.
This task covers: a. Testing
b. Removal
c. Installation
INITIAL SETUP
Equipment Conditions:
Tools:
Heat Gun
disconnected.
Materials/Parts:
Self Locking Nuts (2 Each Push Switch)
General Safety Instructions:
Sleeving Insulation (1 Each Push Switch)
WARNING
Sleeving Insulation (1 Each Push Switch)
High voltage and exposed rotating
parts are used in the refrigeration unit.
Marker tags (4)
Personal injury can result if power is
connected
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 test did not indicate a failure, install insulation sleeving (1) over wire leads (2).
(5) Using tags and wiring diagram (fig. 1-4), connect wire leads (2). Remove tags.
NOTE
Sleeving insulation covers only terminal C on one side of push switch, but must cover both
terminals NO and NC on the other side.
(6) Slip sleeving insulation (1) over exposed terminals and shrink in place using heat gun.
b. Removal.
(1
Remove sleeving insulation (1).
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