THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 1
Jun 1/03
5E1
77-20-00
TEMPERATURE
1. Oil Temperature Indicator
See 79-30-00.
2. Exhaust Gas Temperature (EGT) Gauge
A. Description
This instrument aids the pilot in selecting the most economical fuel-air mixture for cruising flight at a
power setting of 75% or less. It is a sensing device to monitor the fuel-air mixture leaving the engine
cylinders. This gauge is adjustable. If it is found defective after checking with troubleshooting chart,
it should be replaced. If the leads to the gauge are defective in any way, they should be replaced.
When replacing leads, it is very important to use the same type and length of wire, as the
resistance of the leads is critical for the proper operation of this gauge. The EGT probe is the clamp
mounted type which is adjusted for proper depth into the exhaust stream.
B. Troubleshooting
See Chart 1.
C. Removal
(1) Gauge
(a) Disconnect wires from the EGT gauge at the instrument panel.
(b) Remove four bolts which secure the gauge to the instrument panel and remove the
gauge.
(2) Probe
(a) Remove wires from the wire harness going to the engine.
(b) Loosen the nut or clamp which secures the EGT probe to the exhaust system and remove
the probe.
CHART 1
TROUBLESHOOTING EGT GAUGE (ALCOR)
Trouble Cause Remedy
Gauge inoperative. Defective gauge, probe, Check probe and lead
or wiring. wires for chafing, breaks or
shorting between wires
and/or metal structure.
Adjusting potentiometer Recalibrate instruments.
turned off scale.
Fluctuating reading. Loose, frayed or broken Clean and tighten
electrical leads or faulty connections. Repair or
connections. replace defective leads.
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