Piper COMANCHE PA-24-180 Service Manual page 680

PIPER COMANCHE SERVICE MANUAL
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11-78. Fuel Quantty Indictor. (PA-24-S, Serial Nos 24-2844 and up. PA-24-260 and PA-24400.)
11-79 General. The Comanche incorporates only one fuel quantiy puge
n
thi system. This puge will
indicate the amount of fuel in the cell chat i selected. This arTangement is made possible by a selector
switch mounted on the fuel selector valve. The switch ii located directly below the fuel selector place.
An over-nde system is incorporated so that it is possible to check the amount of fuel available m the
remaining cells, without moving the selector handle to that cell position. This is accomplished by depressing
the red button (located on the fuel selector plate) under the desired fuel cell position. The fuel gauge will
indicate the amount of fuel available in that cell. When the red button is released the indicating system will
return to its normal operation of indicating the amount of fuel in the tank selected.
11-80. Removal And Replacement. Refer to Paragraph 11-20 of this secton.
11-81. Troubleshooting.
TABLE XI-XV. FUEL QUANTITY INDICATORS
Trouble Cuue
Remedy
Fuel gauge fails to
indicate.
Broken wiring. Check continuity and
repair.
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Gauge not operaing.
Float is filled with
fuel.
Circuit breaker out.
Defective selector
switch.
Replace panel unit.
Replace sender unit.
Check for possible short
circuit then reset
breaker
Check switch insraila-
tion. replace switch if
necessary
Fuel gauge indicates
full consantly
Incomplete ground.
Check winng, sender
unit and gauge.
Repar or replace.
INSTRUMENTS
ISSUED: 8/18/72
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