PIPER
AIRCRAFT
CORPORATION
SECTION 7
PA-28-161,
WARRIOR
II
DESCRIPTION
&
OPERATION
CIRCUIT BREAKER
PANEL
Figure
7-13
7.17 VACUUM SYSTEM*
The vacuum system
is
designed to operate the air-driven gyro instru-
ments. This includes the directional and attitude gyros when installed. The
system consists
of
an
engine driven vacuum pump, a vacuum regulator, a
filter and the necessary plumbing.
The vacuum pump
is
a dry-type pump. A shear drive protects the pump
from damage.
If
the drive shears, the gyros will become inoperative.
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 may indicate a dirty filter,
dirty screens, possibly a sticky vacuum regulator
or
leak in the system (a low
vacuum indicator light
is
provided in the annunciator panel). Zero pressure
would indicate a sheared pump drive, defective pump, possibly a defective
*Optional equipment
ISSUED: AUGUST 13, 1982
REPORT:
VB-1180
7-13
To Next Page
Loading...
Need help?
General
