Piper AZTEC D PA-23-250 Owner's Handbook Manual page 83

THE PIPER AZTEC ''D"
SECTION V
The steering arms from the rudder pedals to the nose wheel
steering torque shaft arm are adjusted at the rudder pedals or at
the torque shaft rollers 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
i:edals 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 arc of the nose wheel is 15 degrees in either
direction and is factory adjusted at stops on the bottom of the
forging. The turning radius is twenty-eight feet.
In adjusting the steering arm stops, care should be taken to
see that the nose wheel reaches its full travel just after the
rudder hits its stops. This guarantees that the rudder will be
allowed to move through its full travel.
Adjustable rod end bearings are present on each hydraulic
cylinder that actuate the landing gear struts.
Thes~
rod ends should
be set so that the cylinders move the landing gear retracting links
just far enough to engage the spring loaded down locks and make
contact at the stops. Too much extension of the adjusting screws
will overload the links, and too little extension will prevent the
links from traveling to the required past-center position.
Incorporated with each gear assembly is a micro-switch
which closes after full movement of the gear is down. The down
switches are ccnnected individually to green indicator lights on
the pedestal.. The up switches are in series and make contact
after each gear door is closed. When this circuit is complete, the
amber "gear up" light on the pedestal lights up. The micro-
switches must be adjusted carefully so that contact is made just
as the gear and gear door reaches the required position.
Located in the cootrol pedestal below the throttles are three
micro-switches. These switches operate the warning horn (located
in the pedestal) and the red light in the gear handle. When one
throttle is retarded and the gear is up, the red light in the gear
handle will flash. When both throttles are retarded, and gear is
up the warning light and horn will operate.
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