Piper PA-32RT-300T User Manual

LANCE
II SERVICE
MANUAL
SECTION
VI
HYDRAULIC
SYSTEM
6-1.
INTRODUCTION.
The
hydraulic
system
components
covered
in
this
section
consist
of
the
combination
hydraulic
pump
and
reservoir,
gear
back-up
extender
actuator
assembly,
actuating
cylinders
and
hydraulic
lines.
The
brake
system,
although
hydraulically
operated,
is
not
included
in
this
section
as it
has
its
own
hydraulic
system
independent
of
the
gear
retraction
system.
The
brake
system
along
with
the
landing
gear
and
components
is covered
in
Section
VII.
This
section
provides
instructions
for
remedying
difficulties
which
may
arise
in the
operation
of
the
hydraulic
system.
The
instructions
are
organized
so
that
the
mechanic
can
refer
to:
Description
of
the
System,
for
a basic
understanding
of
the
system;
Troubleshooting,
for
a
methodical
approach
in locating
difficulty;
Corrective
Maintenance,
for
the
removal,
repair
and
installation
of
components;
and
Adjustments
and
Checks,
for
the
operation
of
the
repaired
system.
CAUTION
Prior
to
starting
any
investigation
of
the hydraulic
system,
place
the
airplane
on jacks.
(Refer
to
Jacking,
Section
II.)
6-2.
DESCRIPTION.
Hydraulic
fluid
to the
landing
gear
actuating
cylinders
is supplied
by
an
electrically
powered
reversible
pump
located
below
the
raised
floor
in
the
forward
baggage
compartment
at station
45.
A
reservoir
is also
an
integral
part
of
the
pump.
The
pump
is controlled
by
a
selector
switch
on
the instrument
panel
to
the
left of
the
control
quadrant.
As the
switch
is
placed
in either
the up
or
down
position,
the
pump
directs
fluid
through
the
particular
pressure
line
to
each
individual
actuating
cylinder.
As
fluid
pressure
increases
at one
side
of
a cylinder
piston,
fluid
at the
other
side
is directed
back
through
the
other
line
to the
pump.
Both
lines
serve
either
as pressure
or
return
passages
depending
on
the
rotation
of the
pump
to
retract
or extend
the
gear.
A
pressure
switch
is
installed
on
a
cross
fitting
connected
to
the
pump
mount
assembly.
During
retraction
the
pressure
switch
is
the
primary
means
to
shut
down
the
pump.
This
switch
opens
the
electrical
circuit
to the
pump
solenoid
when
the
gear
fully
retracts
and
the
pressure
in
the
system
increases.
The
switch
will
continue
to
hold
the
circuit
open
until
pressure
in
the
system
drops
when
at
that
time
the
pump
will
again
operate
to
build
up
pressure
as long
as
the
gear
selector
handle
is
in
the
up position.
The
down
position
of
the
selector
does
not
affect
the
pressure
switch.
(For
Specific
Pressures
refer
to Table
VI-I.)
Issued:
1/3/78
HYDRAULIC
SYSTEM
1H14

Piper PA-32RT-300T Specifications

General

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