Piper Cherokee Six - Page 323

PIPER
CHEROKEE SIX
SERVICE MANUAL
b. Inspect
the
gear components
for
the following
unfavorable
conditions:
1. Bolts,
bearings
and
bushings
for
excess
wear, corrosion
and damage.
2. Gear
housing,
drag links,
torque
links,
and tension
spring
arm for
cracks,
bends
or misalignment.
3.
Downlock
hook
for
excess
wear of
the hook
and
bearing
surfaces.
4. Downlock
pin
to insure
no looseness
is present.
c. Inspect
the
gear tension
and downlock
hook
springs
for the following:
1. Excess
wear
or corrosion,
especially
around
the hook
portion
of
the springs.
A
spring
should
be
rejected
if wear
or corrosion
exceeds
one-quarter
the diameter
of
the
spring.
Clean away all corrosion
and repaint.
2. Check
the
gear
tension
springs
for
load
tensions
below
minimum
allowable
tolerances.
The
minimum
allowable
tension
of the inner
spring
is 37 pounds
pull
at 13.75
inches
and the
outer
is 60 pounds
pull
at 13.75
inches.
Measurement
is taken
from
the inner
side of
each hook.
If it is
found that
either
spring should
be rejected,
replace
both
springs.
3. Check
the
gear downlock
hook spring
for
load tension
below
minimum
allowable
tolerance.
The
minimum
tension
of
the spring
is 10.5
pounds
pull
at 4.5
inches.
Measurement
is also taken
from
the inner
side
of each
hook.
d.
Check
the general
condition
of each
limit
switch
and its actuator,
and
wiring
for
fraying,
poor connections
or conditions
that
may
lead to failures.
e. Check
drag
link through
center
travel
by attaching
the
upper and
lower drag
links,
and ascertaining
that when
the stop
surfaces
of the
two links
touch, linkage
is not
less than
.125 nor
more
than .250
of an
inch through
center.
Should
the
distance
exceed
the
required
through
center
travel
and bolt
and bushing
are
tight, replace
one
or both
drag links.
f.
The
shimmy
dampener
requires
no
service
other
than routine
inspection.
In case
of
damage
or malfunction,
the
dampener
should
be replaced
rather
than repaired.
g.
Repair
to the
landing
gear
is limited
to reconditioning
of parts
such
as replacing
bearings
and bushings,
smoothing
out
minor
nicks and
scratches,
repainting
of areas
where
paint
has chipped
or
peeled
and replacement
of parts.
h.
Refer
to Table
VIA-I
for service
tolerance
information.
6A-11.
INSTALLATION
OF
NOSE LANDING
GEAR.
(Refer
to Figure
6A-2.)
NOTE
When
assembling
any
units
of the landing
gear, lubricate
bearings,
bushings,
and friction
surfaces
with the
proper
lubricant
as described
in
Section
II.
a.
Attach
the steering
bellcrank
(4) with
bushing
to its
mounting
plate
on
the engine
mount
(44)
and connect
the
steering
rods
(1).
Secure
each
with bolt
and
nut
(3). The
adjustment,
fore and
aft, of
the bellcrank
may be
made after
the
gear has
been installed
and
rigged and
adjusted.
b. To
install
the gear
housing assembly,
position
the gear
so that the
bolt attachment
points
on the
housing
(25) align
with the
attachment
points
on the
engine mount
(44).
Install pivot
bolts,
washers
and nuts
(7 and 33).
Tighten
the nuts
to a snug
fit, yet allowing
the gear
to swing free,
and safety.
c. The
drag links
(32 and
35) and
gear tension
spring
arms (43
and 45)
may be
installed
by
the following
procedure:
Revised: 8/3/81
LANDING
GEAR AND BRAKE SYSTEM
2C23