Piper Cherokee Six - Page 45

*PIPER
CHEROKEE
SIX
SERVICE
MANUAL
2-32.
HYDRAULIC
SYSTEM
(PA-32R).
2-32a.
SERVICING
HYDRAULIC
SYSTEM.
The
general
condition
of the
hydraulic
pump
and
landing
gear
actuating
cylinders
should
be checked.
Ensure
that
there
are
no
leaks
and
that
the
line
fittings
are
tight.
The
cylinder
rods
are
to
be
free
of all
dirt
and grit.
To
clean
the
rods
use
an oil
soaked
rag
and
carefully
wipe
them.
All
the hydraulic
lines
should
also
be
checked
for leaks,
kinks,
and
corrosion.
Check
the
tightness
of the
attachment
fittings.
The
gear
back
up
extender
actuator
assembly
is located
beneath
the
floorboard
of
center
seats
and
should
be checked
to determine
that
it is
operating
properly.
The
diaphragm
shaft
may
be operated
by
hand
to
make
sure
that
it is
free
to fluctuate
and
that
the
actuating
arm
and
its
components
are
operating
freely.
Check
the
pressure
housing
assembly
for
cracks,
breaks.
or fatigue.
Check
to ensure
that
the
hydraulic
valve
and
fittings
are free
of
leaks.
Repair
and
check
procedures
for
the
hydraulic
pump.
cylinders
and
various
components
may
be
found
in
Section
VA
of
this
manual.
2-32b.
SERVICING
HYDRAULIC
PUMP/RESERVOIR.
The
fluid
level
of
the
reservoir
of
the
combination
pump
and
reservoir
should
be
checked
every
50
hours
by
viewing
the
fluid
through
the
filler
plug
hole
in
the
hydraulic
pump.
Access
to
the
pump
is
through
the
panel
at
the
left
side
of
forward
baggage
compartment.
To check
fluid
level,
remove
the
filler
plug
located
on
the
forward
side
of
the
pump
and
ascertain
that
fluid
is
visible
up
to the
bottom
of
the
filler
plug
hole.
Should
fluid
be
below
the
hole,
add
fluid,
MIL-H-5606A,
through
the
filler
hole
until
full.
Reinstall
the
filler
plug
and
tighten.
NOTE
A small
vent
hole
is located
under
the
vent
screw
head.
Retain
1/64
inch
clearance
between
the
screw
head
and
the
small vent
hole.
2-33.
LANDING
GEAR
SYSTEM.
2-33a.
SERVICING
LANDING
GEAR.
The
landing
gear
consists
of tires.
brakes,
oleo
strut
assemblies
and
on
some
models
wheel
fairings.
These
should
be inspected
for
proper
gear
extension.
scored
piston
tubes.
possible
hydraulic
fluid
leakage,
security
and
condition
of all
connection
points
and
the
fiberglass
fairings
for cracks.
Check
the
brake
linings
for
wear
and
frayed
edges,
and
brake
discs
for
scoring.
Replace
if
found
necessary.
In
addition.
the
PA-32R
should
be
checked
for
proper
adjustment
of
downlock
hooks,
looseness
of
drag
links
and
side
brace
links.
Minor
servicing
is
described
in
the
following
paragraphs,
and
for
detailed
service
and
overhaul
instructions.
(Refer
to
Section
VI
or
VIA.)
2-34.
OLEO
STRUTS.
2-34A.
SERVICING
OLEO
STRUTS.
The
air-oil
type
oleo
strut
should
be
maintained
at
proper
strut
tube
exposures
for best
oleo
action.
The
nose
gear
strut
must
have
approximately
3.50 ±
.50
inches
on PA
32-260;
3.25 ±
.25
inches
on PA
32-300;
or 2.75
inches
on
PA 32-R.
The
main
gear
strut
requires
approximately
4.50
±
.25 inches
on PA
32-260;
4.50
±
.50 in-
ches
on PA
32-300;
or 4.00
inches
on
PA 32R.
Refer
to
Table
II-IV.
Revised:
12/15/80
HANDLING
AND
SERVICING
1B21