Piper Cherokee Six - Page 237

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
5A-20.
INSTALLATION
OF
NOSE
GEAR
ACTUATING
CYLINDER.
a.
Attach
the
cylinder
to
its
attachment
fitting
using
bolt
and
nut.
b.
Attach
the
operating
rod
end
to
the
downlock,
this
will
require
manually
unlocking
the
nose
gear
to
allow
clearance
from
the
engine
mount
to
install
attaching
bolt.
(Refer
to
Caution
Note
Paragraph
5A-16).
c.
Connect
the
hydraulic
lines
to
the
cylinder
fittings.
d.
Check
the
adjustment
of
the
cylinder
rod
end.
(Refer
to
Adjustment
of
Nose
Landing
Gear,
Section
VIA.)
e.
Operate
pump
to
purge
system
of
air
and
check
fluid
level
in
reservoir.
f.
Remove
the
airplane
from
jacks.
5A-21.
MAIN
GEAR
ACTUATING
CYLINDER.
5A-22.
REMOVAL
OF
MAIN
GEAR
ACTUATING
CYLINDER.
a.
Place
the
airplane
on
jacks.
(Refer
to
Jacking,
Section
II.)
b.
Disconnect
the
hydraulic
lines
from
the
actuating
cylinder
and
cover
the
open
line
ends
to
prevent
contamination.
c.
Disconnect
the
gear
downlock
spring
from
the
swivel
fitting
at
the
upper
end
of
the
spring.
d.
Remove
the
downlock
spring
swivel
fitting
and
disconnect
the
cylinder
operating
rod
end
from
the
upper
side
brace
retraction
fitting
by
removing
the
attaching
nut,
washer
and
bolt.
e.
Disconnect
the
cylinder
from
its
attachment
by
removing
nut
and
bolt.
f.
Remove
the
cylinder
from
the
wheel
well.
5A-23.
DISASSEMBLY
OF
MAIN
GEAR
ACTUATING
CYLINDER.
(Refer
to
Figure
5A-9.)
a.
With
the
cylinder
removed
from
the
airplane,
push
the
piston
rod
(6)
(by
hand)
toward
the
clevis
(9)
to
remove
oil
from
the
unit.
b.
Put
clevis
(9)
only
in
a
soft
jaw
vise
and
clamp
against
the
clevis
bearing
(10).
c.
If
no
pipe
fitting
is
installed
in
the
port
of
the
end
gland
(1),
install
a
fitting
(1/8
-
27)
into
the
port.
This
fitting
need
not
be
tight
as
it
will
be
used
for
leverage
only.
d.
Rotate
the
gland
counterclockwise
(with
use
of
fitting)
until
the
end
of
the
gland
lock
ring
(4)
shows
in
the
slot
in
the
cylinder
body
(7).
Reverse
rotation
of
the
gland
(clockwise
direction)
to
allow
the
lock
ring
to
move
out
of
the
slot.
(Refer
to
Figure
5A-8.)
(It
may
be
necessary
to
give
the
ring
an
assist
to
start
out
of
the
slot.
If
so,
insert
a
strong
wire
pick
or
other
available
tool
in
the
slot
to
lift
up
the
end
of
the
ring
and
then
rotate
gland.)
e.
Pull
the
piston
(6)
and
end
gland
from
the
cylinder.
f.
Remove
O-rings
as
desired.
HYDRAULIC
SYSTEM
Issued:
7/28/75
1J21