Piper COMANCHE 260 - Vacuum System Operation

THE
PIPER
COMANCHE
SECTION
11
.
Clock
11.
lImstrument
Cluster
1
2,
Alrspeed
12.
Fuel
Flow
Indicator
3.
Directional
Gyro
13.
VHF
Radio
4.
Artificial
Horizon
14.
Omni
Indicator
5.
ADF
Radio
Compass
15.
Flap
Indicator
6.
Compass
16.
Vertical
Speed
7.
ADF
Radio
17.
LandingGear
Selector
8. Manifold Pressure 18. Turn and Bank
9. Tachometer 19. Altimeter
10,
Ammeter
20.
Suction
Gauge
VACUUM SYSTEM
Suction for the vacuum operated Gyro instruments i{s sup-
plied by an engine driven (dry type) vacuum pump.
A vacuum gauge is installed in the instrument panel to
provide a constant indication of vacuum source. Suction is
indicated on the gauge in inches of mercury; normal operating
range
is
4.8
to
5.1
inches.
The
system
is
controlled
by
one
adjustable
regulator,
located
under
the
instrument
panel.
After
initial
adjustment
the
regulator
will
require
very
little
attention.
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