Specifications
CHEROKEE SIX
-
3OO
VACI,JUM SYSTEM
The
vacuum
system employed
to
operate
the
gyro
instruments includes an engine-driven
dry vacuum
pump,
a
vacuum regulator
valve,
and the tubing necessary
to
complete the
system.
The use of
a
dry type
vacuum
pump
eliminates the
need
for
an
oil-air
separator
and
the
hardware necessary
for
its
installation.
The vacuum
gauge
is
mounted
on the right side of
the
instrument
panel.
The
gauge
is
calibrated in inches
of
mercury and
indicates the amount
of
suction
created
by the
engine-driven
vacuum
pump.
As the
systern filter
becomes
clogged
or
the
lines obstructed, the
gauge
will
show
a
decrease
in
pressure
(a
low vacuum
indicator
light is
provided
in the
annunciator
panel*).
Do
not
reset
the
regulator
until the
filter
and lines
have been
checked.
A vacuum regulator
valve is incorporated in the
system to control
vacuum
pressure
to
the
gyro
instruments. The regulator
valve is located under the
instrument
panel.
Access
to the valve
for
maintenance
and
adjustment
is
gained
from
below the
instrument
panel.
The
regulator
should be
set
so that
the
vacuum
gauge
reads 5.0
t
.l
inches of
mercury
with
the
engine
running
at
medium
RPM
after
warm-up.
INSTRUMENT PANEL
The
instrument
panel
of the Cherokee
Six is
designed
to
accommodate
the
customary
advanced
flight
instruments and
the
normally required
power
plant
instruments.
The
artificial
horizon
and
directional
gyro
are
vacuum
operated and are
located
in the
center of
the left hand
instrument
panel.
The
vacuum
gauge
is
located
on
the
right hand
instrument
panel.
The turn
indicator,
on
the
left side,
is
electrically operated.
A
natural separation of the flight
group
and the
power
group
is
achieved by
the
placement
of the flight
group
in
the
upper instrument
panel
and
the
power
group
in
the
center
and
lower
instrument
panels.
The radios are
located
in
the
center section of the
panel,
and the circuit
breakers
are in
the lower right behind a decorative door.
An
annunciator
panel*
is
mounted
in
the upper
instrument
panel
to
warn
the
pilot
of
a
possible
malfunction in
the
alternator, oil
pressure,
or
vacuum
systems.
rSerial
nos.
7540001
and
up
AIRPI.ANE
AND
SYSTEMS
REVISED:
JLJNE 20,1974
2-13