TM 5-3805-262-20
5-8. SENDING UNITS AND WARNING SWITCHES MAINTENANCE (CONT)
d. Converter Temperature Sending U n i t ( c o n t ).
INSPECTION, TESTING, AND REPAIR
(1)
(2)
(3)
(4)
( a)
(b)
( c)
(d)
( e)
Inspect wiring harness terminal (4) wire for cracked or broken insulation
or broken wire strands at connection to terminal. Repair cracked or bro-
ken insulation by applying insulation tape to area. If broken wire
strands are seen, cut wire as close to terminal as possible.
S t r i p 1 /4
inch insulation from end of wire taking care not to cut through wire then
crimp new terminal securely onto wire.
Inspect converter temperature sending unit (5) for cracks, breaks, dam-
aged threads, distortion, broken or missing terminal, or other damage.
Replace if any of these conditions are seen.
Inspect remaining parts for cracks, breaks, distortion, or damaged
t h r e a d s; replace as necessary.
Test converter temperature sending unit (5) as follows:
Connect multimeter between converter temperature sending unit body and
terminal as shown below.
Lower a thermometer and threaded end of converter temperature sending
unit into a pan of water.
Slowly heat and stir water while watching thermometer and multimeter.
At 100 degrees F, multimeter should indicate 3000 to 3600 ohms. At 200
degrees F, multimeter should indicate 640 to 780 ohms.
Remove converter temperature sending unit and thermometer from water
and disconnect multimeter.
Replace converter temperature sending unit if multimeter indications
in step (c) above are not obtained. Dry converter temperature sending
u n i t t h o r o u g h l y b e f o r e i n s t a l l i n g .
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