INSTALLATION OF PA-44-180 EGT PROBE.
— NOTE —
When installing the probe, make sure to leave a minimum of 1/2
inch slack between where the lead cable attaches to the engine
and engine mount, to accommodate engine shock movement.
1. S/n’s 44-7995001 thru 44-8195026:
A . If not already done, drill a .129 inch hole for the probe in the number one cylinder exhaust
m a n ifold at 45°(typical) to the centerline of the cylinder, and 1.5 inches down from the mounting
flange of the manifold.
B. Install the probe in the hole drilled for it, and torque the worm screw clamp to 45 inch-pounds.
C. Cut off any excess of the clamp over .75 inch and file corners smooth.
D. Safety wire the screwhead of the clamp to the .75 inch clamp extension with .032 diameter safety
wire.
— CAUTION —
WHEN COILING THE LEAD CABLE, DO NOT LET IT
BEND PAST A 1/8 INCH RADIUS.
E. Run the cable back across the engine and mount, through the leading edge of the wing (where
extra cable should be coiled and tied to an existing bundle), and into the fuselage to the rear of the
instrument.
F. Attach the lead wires to their appropriate terminals of the instrument as shown in Figure 77-1.
2. S/n’s 4495001 and up:
A . If not already done, drill a .129 inch hole for the probe in the number one cylinder exhaust
m a n ifold at 45°(typical) to the centerline of the cylinder, and 4.5 inches down from the mounting
flange of the manifold.
B. Install the probe in the hole drilled for it, and torque the worm screw clamp to 45 inch-pounds.
C. Cut off any excess of the clamp over .75 inch and file corners smooth.
— CAUTION —
WHEN COILING THE LEAD CABLE, DO NOT LET IT
BEND PAST A 1/8 INCH RADIUS.
D. Run the cable back across the engine and mount, through the leading edge of the wing (where
extra cable should be coiled and tied to an existing bundle), and into the fuselage to the rear of the
instrument.
E. Attach the lead wires to their appropriate terminals of the instrument
REMOVAL OF PA-44-180TEGT PROBE.
1. Disconnect the wires from the rear of the instrument and remove the wires through the aircraft to the
engine.
2. Loosen the EGT probe jam nut and unscrew the EGT probe from the exhaust stack.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
77-32-03
Page 77-13
Revised: June 20, 1995
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