Piper Cherokee Six - Page 345

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
6A-31.
ADJUSTMENT
OF
NOSE
GEAR
UP
LIMIT
SWITCH.
The
gear
up
limit
switch
is
mounted
on
a
bracket
above
the
point
where
the
right
side
of
the
upper
drag
link
attaches
to
the
engine
mount.
(Refer
to
Figure
6A-10.)
a.
To
facilitate
adjustment
of
the
limit
switch,
disconnect
the
gear
doors
or
remove
the
bottom
cowl,
as
desired.
b.
Retract
the
landing
gear
hydro-electrically
by
turning
the
master
switch
on,
raising
the
emergency
gear
extension
lever
and
moving
the
gear
selector
handle
to
the
up
position.
Retain
the
emergency
extension
lever
in
the
up
position
and
turn
the
master
switch
off.
c.
Block
the
nose
gear
in
the
up
position
and
then
slowly
release
the
emergency
extension
lever.
This
will
relieve
hydraulic
pressure
and
the
main
gears
will
drop.
d.
Place
a
.027
of
an
inch
spacer
on
the
oleo
strut
housing
between
the
housing
and
the
crossover
tube
where
the
steering
arm
attaches.
Push
the
gear
up
tight
and
block.
e.
Loosen
the
lower
attachment
screw
of
the
switch
bracket
and
rotate
the
switch
toward
the
actuator
tang
until
it
is
heard
to
actuate.
Retighten
the
bracket
attachment
screw
of
the
switch.
f.
Manually
move
the
gear
up
and
down
only
as
far
as
necessary
to
ascertain
that
the
switch
actuates
at
the
correct
position.
Remove
the
block
from
under
the
gear
and
allow
it
to
slowly
extend.
g.
Retract
the
gear
hydro-electrically
and
ascertain
that
the
red
gear
unsafe
light
will
go
out
when
the
gear
has
retracted
and
the
pump
has
shut
off.
6A-32.
ADJUSTMENT
OF
NOSE
GEAR
DOWN
LIMIT
SWITCH.
The
gear
down
limit
switch
is
mounted
on
the
horizontal
support
tube
of
the
engine
mount
that
runs
between
the
right
attachment
points
of
the
gear
housing
and
upper
drag
link.
a.
Ascertain
that
the
gear
is
down
and
locked.
b.
The
down
limit
switch
should
actuate
only
after
the
leading
edge
of
the
downlock
hook,
when
moving
to
the
locked
position,
has
passed
the
downlock
roller
by
.06
of
an
inch.
(Refer
to
Figure
6A-10.)
Position
the
hook
at
this
location
in
relation
to
the
roller
by
moving
the
actuator
piston
manually
toward
the
up
position.
The
downlock
spring
may
be
disconnected,
if
desired.
c.
Loosen
lower
attachment
screw
of
the
switch
mounting
bracket
and
move
bracket
toward
the
downlock
hook
until
it
is
heard
to
actuate.
Retighten
the
bracket
attachment
scre w.
d.
Manually
move
the
hook
from
the
locked
to
the
unlocked
position
and
ascertain
that
the
switch
actuates
at
the
correct
location
of
the
hook.
e.
Retract
and
extend
the
gear
hydroelectrically
by
turning
the
master
switch
on.
raising
the
emergency
gear
extension
lever
and
moving
the
gear
selector
handle
to
the
up
position.
As
the
gear
begins
to
retract
the
green
light
below
the
selector
should
go
out
and
the
red
gear
unsafe
light
at
the
top
of
the
instrument
panel
should
come
on.
6A-33.
ADJUSTMENT
OF
MAIN
GEAR
UP
LIMIT
SWITCH.
A
gear
up
limit
switch
is
located
in
each
wheel
well
above
the
gear
door
hinge.
There
is
no
adjustment
of
these
switches
other
than
checking
that
the
gear.
when
retracting.
will
actuate
the
switch
within
.88
of
an
inch
of
full
up.
Switch
operation
turns
the
red
gear
unsafe
light
out.
LANDING
GEAR
AND
BRAKE
SYSTEM
Issued:
7/28/75
2D21