D. Cleaning and Inspection
Unless mechanical damage is evident, broken glass, bent or broken pointer, or broken case, the
following checks should be performed before removing the instrument.
(1) Remove probe and check for broken weld (at the tip end) or burnt off end. Measured
resistance of probe should be .8 ohms. Clean the connections with steel wool before
reassembly.
(2) Disconnect lead wires at instrument and measure. Resistance with lead wires connected to
probe should be 3.3 ohms. Clean connections with steel wool before reassembly.
CAUTION: DO NOT CONNECT OHMMETER. IT WILL BURN OUT THE MOVEMENT OF
THE METER.
(3) With leads connected to instrument, heat probe with propane torch to dull red. The meter
should read up to the fourth graduation or approximately 1500°F. Before making this check,
make sure that the adjustment screw, which is located in the rear of the instrument case, is in
the center of its travel. If this screw has been turned to either end of full travel, it will shut
instrument off and no indication will be shown on the pointer. If meter still does not read.
replace it.
E. Installation
(1) Probe
(a) Install the probe and secure with locknut or clamp.
(b) Route the thermocouple wires along with the existing wire harness to the instrument
panel.
(2) Gauge
(a) Install the EGT gauge into the instrument panel and secure with four bolts.
(b) Connect the thermocouple wires to the rear of the EGT gauge.
THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 2
Jun 1/03
5E2
77-20-00
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