Piper CHEROKEE 180 - Leveling and Rigging Procedures

SECTION VI
CHEROKEE
180
Should
fluid be below the
bottom
of the filler plug
hole,
oil
should
be added. Replace the
plug
with valve core removed,
attach
a
clear
plastic hose to the valve strut of the filler
plug
and submerge
the
other
end
in
a
container of hydraulic
fluid
(MIL-H-5606).
Fully compress and
extend the strut several times thus
drawing
fluid from
the
container and
expelling air from
the
strut chamber.
To
allow the
fluid
to
enter
the
bottom chamber of the
main gear strut housing,
the torque link
assembly must
be disconnected
to let
the
strut be
extended a minimum
of 10
inches. (The nose gear torque
links
need not be
disconnected.)
Do
not
allow
the strut to
extend more than 12
inches. When air
bubbles
cease
to
flow through the
hose, compress
the
strut
fully
and again
check
fluid
level.
Reinstall
the valve core and filler
plug,
and
the main
gear
torque links,
if
disconnected.
With
fluid in the strut
housing
at
the correct level, attach
a
strut
pump
to the air valve and with the airplane on the
ground,
inflate
the
oleo
strut to
the
correct
height.
In jacking the
Cherokee for
landing
gear or other service,
a jack kit
(available
through
Piper Dealers
or Distributors)
should
be
used.
This
kit
consists
of two hydraulic
jacks
and
a
tail
stand. At
least 250 pounds
of
ballast should be placed on the base
of the tail
stand
before
the
airplane
is
jacked
up.
The hydraulic
jacks should
be placed under the
jack
points on
the
bottom
of
the
wing
and the
airplane jacked
up
until
the
tail
skid is at the
right
height to
attach the tail stand.
After
attaching the tail stand and
adding
the
ballast,
the
jacking
may
be
continued
until the aircraft
is at
the height desired.
The
steering
arms
from the
rudder
pedals to the
nose wheel are
adjusted
at
the rudder pedals or
at the
nose wheel by turning
in or out
the
threaded rod end bearings.
Adjustment
is
normally
accomplished at
the
forward end of the rods and
should be done
in
such
a way that
the
nose
wheel is in line
with the fore
and
aft axis of
the plane when the
rudder
pedals
and rudder are
centered.
Alignment
of the nose wheel can
be
checked by
pushing
the airplane
back
and forth
with the rudder
centered
to
determine that the
plane
follows
a
perfectly straight line.
The
turning
are of the nose
wheel
is
22
degrees in either direction
and
factory
adjusted
at stops on
the
bottom
of the forging.
The
turning
radius
of
the
nose
wheel
is 17 feet.
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