TM 55-2840-251-23
7-7 THERMOCOUPLES PROBES (AVIM) (Continued)
7-7-1 INSPECTION
Replace probes if cracked, bent or if probes do not meet
electrical test requirements (Task 7-7-2).
7-7-2 TESTING
1.
Check resistance between each probe terminal is
0.24 to 0.46 ohm, otherwise reject thermocouple.
2.
Check insulation resistance between either terminal
and sheath is not less than 10 megohms at 100 volts,
otherwise reject thermocouple.
7-7-3 REMOVAL
1.
Remove lockwire and unscrew nut (3) using Wrench
(T.56) or (T.57).
2.
Remove probe (2) and washer (1). Discard washer.
7-7-4 INSTALLATION
1.
Install washer (1), nut (3) and probe (2). Torque nut
to 40 to 50 inch-pounds using Wrench (T.56) or (T.57).
2.
Lockwire (E.4) nuts in pairs.
FOLLOW ON MAINTENANCE:
Installation Thermocouple Bushbar
(Task 7-6-4) and/or
Connect Thermocouple Harness
(Task 7-5-5)
Installation Power Section
(Task 4-2-3)
END OF TASK
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