Piper Cherokee Six - Page 524

PIPER CHEROKEE
SIX SERVICE
MANUAL
c. 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
the instrument
off and no
indication will
be shown
on the pointer.
If meter still
does not read,
replace
it.
CAUTION
Do not
connect ohmmeter
across
meter. It will
burn out
the
movement of the meter.
9-82.
INSTALLATION
OF
EGT PROBE
AND GAUGE.
a. Install probe
in the following
manner.
1. Locate
the hole for
the probe
in the exhaust
stack of
the number
six cylinder.
The
.129
inch hole
is located
2.25 inches
from the mating
side
of the mounting
flange.
2.
Carefully
expand the
clamp that
the probe
is mounted
to and slide
the probe
through
the hole.
3. Tighten
the
worm
clamp down
to 45
in.-lbs. and
safety
wire.
4. Route cable
back and up along
the engine mount,
and through the
firewall where
the
magneto switch
wires go,
keeping at
least a minimum
of 1 /2
inch lead wire
to allow for
normal engine
shock mount
movement.
NOTE
On aft side
of firewall make
sure to
provide clearance
from
T-bar and rudder bar.
b. Install
gauge
in the
following
manner.
1.
Insert the
gauge into
the instrument
panel
and secure
with
four bolts.
2.
Connect the
thermocouple
wires to the
back of the
gauge.
Revised:
12/4/79
INSTRUMENTS
2L8