PIPER
SENECA
II
SERVICE
MANUAL
10-82. TROUBLESHOOTING.
TABLE X-XV. CYLINDER HEAD TEMPERATURE GAUGE
Trouble
Cause
Remedy
Instrument shows no
Engine
is
cold.
Warm
up engine.
indication.
Power supply wire open. Repair wire.
Defective sender.
Replace sender.
Defective instrument.
Replace instrument.
Open circuit breaker.
Troubleshoot for fault.
Instrument goes all
Wire
grounded between
Repair wire.
the way to upper stop.
sender and gauge.
Defective sender.
Replace sender.
. 10-83. REMOVAL AND REPLACEMENT. Refer
to
Paragraph- I 0-
72
of
this section.
· 10-84. FUEL FLOW GAUGE.
10-85. GENERAL. The fuel flow gauge
is
a non-electric differential pressure gauge mounted in the
bottom
of
the instrument panel.
This instrument measures flow by reading the pressure drop across a fixed orifice located in the fuel
divider. With a constant fuel pressure being supplied by the engine driven pump and putting a fixed orifice
in the fuel divider head and then measuring
the
pressure drop downstream
of
the orifice against manifold
pressure, the resultant pressure can be calibrated in gallons per hour flow.
10-86. TROUBLESHOOTING.
TABLE
X-XVI.
FUEL FLOW GAUGE
Trouble
Cause Remedy
Pointer oscillates.
Air in fuel line.
Purge line.
Gauge reads low at Vent line restricted. Check line and fittings.
altitude.
Pointer does not
Fuel in diaphragm
of
Replace gauge.
return
to
zero. gauge.
Reissued: 10/11/79
INSTRUMENTS
2F14
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