CHEROKEE
WARRIOR
VACUUM
SYSTEM*
The
vacuum
system is designed
to operatc
the air driven
gyro
instruments. l'his includes
thc dircctiottal nrtd uttitudc
gyros
whcn
installcd.
The system consists of an
engine
<lriverr
\lrcuunl
ptl
nll). il
vircuilrn
rcgttllrtrlr,
il
l-i
ltcr lrrrrl
tlrc llccessitry
lllturtbing.
The
vacuum
pump
is a dry' type
pump
whrclt
eliminates
the nced for
an air/oil separator
and
its
plunrbing.
A
sltear drive
protects
the
pump
from
damage. If
the drive
shears. thc'gyros
will
heconrc
inoperrtivc.
A
vacuum gauge.
mounted
on
the
far right
instrument
panel provides
a
pilot
check
for
the
system during operation.
A decrease
in
pressure
in
a
system that
remained
constant
over an
extended
period
mav
indicate a dirty filter.
dirty screens,
possibly
a sticky
vacuum
regulator or
leak irt thc systent
(a
low vacuum
indicator light is
provided
in the annunciator
panel**).
Zero
pressure
would
indicate a sheared
pump
dnve. detective
pump, possibly
a
defective
gauge
or
collapsed line. In
the
c'vent
of any
gauge
variation from
the norm, the
pilot
should
have
a
mechanic
check
the system
to
prevent
possible
damage
to the system components
or eventual
failure
of the system.
A
vacuum
regulator is
provided
in the
system to
protect
the
gyros.
The valve is set so the
normal
vacuurn
reads 5.0
+
.l inchc's of mercury, a
setting
which
provides
sufficient
vacuum
to
opcrate all the
gyros
at their
rated RPM.
Higher settings
will
damage the
gyros
and
with
a low
setting
the
gyros
will
be unreliable. The regulator
is
located behind the instrument
panel.
INSTRUMENT
PANEL
Thc instrument
panel
is designed
to
be firnctiorral and
professional,
accommodating
complete
instruments and avionics equipment
for
VFR
and
IFR flights.
A
wide
range of
optional instmments and avionics
pennit
an equipment selection
to suit individual
needs.
A
natural scparation
of
the flight
groul'r
and
power
group
is
provided
by
placing
the fligltt
group
in the upper instrument
panel
and
thc
power group
in the center and
lower instrument
panels.
The radios and the- circuit breakers are located on
the
upper
and lower
right
panel
respective'ly. and havt'
circuits
provided
for a
complete
line of optional
radio equipment.
An
engine cluster is
located
to tht-' right
of
the
pilot
control
wheel
and
includes a
fuel
pressure
gauge.
a rig}t and
let't
main
fuel
quantity gauge.
an oil
temperature
gauge
and an oil
pressure
gallge.
Standard instruments
on the
Warrior
panel
include
a compass, an
airspeed indicator, a
tachometer. an altimeter, an ammeter,
an
engine
cluster.
and an
annunciator
panel**.
The
conlpass
is
mounted
to thc top of the
instrument
panel
in
clear
view
of the
pilot.
The
annunciator
panel
is
mounted
in the upper
instrument
panel
to
warn
the
pilot
of a
possible
nrall'unction in the alternator.
oil
pressure.
or
vacuum
systems.
r\
r'otn;llt'tc
lttte
<ll
iltstrtnrrenl
olltious
uvrriluhlc
l'rlr
tlrc
panel
irtclrrdes u
suctir)n
gaugc,
vt
rlrtrrl
sP1'q'11
rrttlitrrlot. rrllrttttlt'
gylo,
tlirt:ctiorr;rl
91,rt-1.
clock.
tru-spceitl ilrdicator
and a turn
rrrrtl
sliP
intlieutor
ol
turrr eorlrul inatol'.
-[-lrc
attitudc
gyro
ancl directional
gyro
are
vacuum
operatcd
throrrglt
the use ol a
vucuum pump
installcd on the engine,
while
the
turn
and slip
indicator is electrically'operated. The
vacuum
suction
gaugc
is on the far
right of the
instrument
panel
*Optional
equipment
**Serial
nos. 7515001
and up
AIRPLANE
AND SYSTEMS
REVISED:
JUNE
14.1974 2-t3
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