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 TM 9-2320-285-24-1
2-84.
HOURMETER TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
HOURMETER INOPERATIVE
Step 1.
Raise instrument panel (para 2-26g(1)).
Unplug electrical leads from hourmeter terminals (para 2-88).
Using 12 volt battery and jumper cables, apply 12Vdc across
hourmeter terminals (be sure to use correct polarity).
Record hourmeter display time to nearest 1/10 hour; watch hourmeter
for six minutes.
a.
If hourmeter display does not advance approximately 1/10 hour,
hourmeter is defective; replace (para 2-88).
b.
If hourmeter display advances approximately 1/10 hour, go to
step 2 below.
Step 2.
Raise instrument panel (para 2-26g(1)).
Check hourmeter for loose or incorrect connections and broken
conductor.
a.
If connections are loose or incorrect, tighten or correct (para
b.
If conductor is broken, replace (para 2-88).
2-910
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