Piper PA-32RT-300T User Manual

b. Suction
Gauge:
1.
The Suction
gauge
seldom
require
service
and
usually
is replaced
when
malfunctions
occur.
NOTE
Suction
gauge
failure in
a properly
operating
vacuum
system
does not
impair safety
of flight.
2. If
the suction
gauge malfunctions
in
a manner to
cause an
incorrect reading
in
normal cruise
conditions, the
gauge must be checked
by comparing
the reading with a
gauge
of known accuracy.
If the gauge is indicating
correct values
and the system
vacuum level is
not in accordance
with the specified
vacuum, then and
only then should
the regulator be
reset.
3.
Visual examination
of
the gauge performance
should cover
the following
steps:
(a) With
engine stopped
and no vacuum applied
to the gauge,
its pointer should
rest against
the internal stop
in the 9 o'clock
position.
Any other
displacement
from
this position
suggests need
for replacement.
(b) A
slight overshoot
during engine startup,
not to exceed
half an inch
(1/2")
of mercury,
is normal
and is not
cause to replace
gauge.
(c)
With engine operating
at normal
cruise RPM, the
gauge should read
from 4.8
inches
to
5.1 inches
of mercury
(vacuum).
(d) At 1200 RPM,
the vacuum gauge
reading should
be more than
four inches of
mercury.
c. Vacuum
System
Filters:
1.
The system
employs
a large central
filter
and differential
suction
gauge that
continuously
monitors the
filter condition
while indicating
vacuum
readings.
This central
air
filter
located
under the
instrument
panel
must be
replaced
on a scheduled
basis,
not
to
exceed 100 hours
or sooner as condition
indicates.
NOTE
The filter
in combination
with a
differential
vacuum gauge
will indicate
a decline
in panel
gauge reading
when the filter
becomes clogged
and vacuum
declines below the
recommended
value. The
filter should
be replaced
when
gauge reading declines below the recommended value of 4.8
to 5.1. inches
of mercury
do
not adjust
regulator.
2.
The vacuum regulator
filter should
be cleaned or
replaced every
100 hours.
Clean the
filter with
a mild soap
solution and
rinse completely.
Issued: 1/3/78
INSTRUMENTS
2E5
LANCE
II SERVICE MANUAL

Piper PA-32RT-300T Specifications

General

Brand	Piper
Model	PA-32RT-300T
Category	Aircrafts
Language	English