Piper Cherokee Six - Page 346

A949
DOWN
LIMIT
SWITCH
UP LIMIT
SWITCH
Figure 6A-10.
Adjustment
of Nose
Figure 6A-1 1.
Adjustment of
Main
Gear
Down Limit Switch
Gear Down Limit
Switch
6A-34.
ADJUSTMENT OF MAIN GEAR
DOWN LIMIT SWITCH. A gear
down limit
switch is mounted
on a bracket which is attached to the
lower drag link of each main gear.
The
switch should be adjusted to allow it to
actuate thus turning on the green indicator
light
within
the cockpit when the downlock hook
has entered the locked position and
is within
.025 to .035 of an inch
of contacting the downlock pin.
(Refer to Figure 6A-11.)
Adjustment of
the switch may be
as follows:
a. Ascertain
that the main gear downlock is properly
adjusted as described in Paragraph
6A-25.
b. Raise
the airplane on jacks. (Refer
to Jacking, Section II.)
c. Ascertain
that the landing gear is down and
pressure is relieved from the hydraulic
system. To relieve pressure,
hold down the emergency
extender lever.
d. Raise the downlock hook
assembly and place a .030 of an
inch feeler gauge between
the horizontal surface of the
hook that is next to the switch (the
surface that contacts the
downlock
pin) and the rounded surface of
the pin. Lower the hook and allow
it to rest on
the
feeler
gauge.
e. Loosen the attaching screws of
the switch and, while pushing up on
the center of the
link assembly,
rotate the switch toward the hook
until it is heard to actuate. Retighten
the
attaching
screws
of the switch.
f. Manually
move the hook
assembly up from
the pin until the
hook nearly disengages
from the pin. Then,
with pressure against the bottom of
the link assembly, move back to
ascertain that
the switch actuates within .025
to .035 of an inch of full lock.
g. 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.
LANDING
GEAR AND
BRAKE SYSTEM
Issued: 7/28/75
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
2D22