PIPER SENECA II SERVICE MANUAL
VII - LANDING GEAR AND BRAKE SYSTEM 04/30/07
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i. Install the down lock link (see Figure 7-2) with the rod end connected to the retraction link and the
other end to the bottom drag link.
j. Adjust the down lock link as necessary until the guide pin is completely bottomed out at the top of
its slot and the retraction link is moved against its stop.
NO
TE: If the down lock link is adjusted properly, the retraction link will be moved completely to
its stop by the down lock link therefore taking up some of the extra actuator piston rod
travel and activating the down and locked limit switch.
k. Retract and free fall the landing gear at least three times. Remove the down lock link, shorten it by
1/2 turn and reinstall.
l. The down and locked limit switch should be adjusted to have it actuated when the retraction link is
back against its stop.
m. Using a tow bar to reach full travel against stops, rig the nose gear steering rod ends as necessary to
allow full deflection.
n. See Figure 7-2, Sketch B and set the up stop to the dimension shown. Retract the gear and ensure
the nose gear housing engages the stop under retraction pressure. Adjust as necessary.
NO
TE: After any up stop adjustment, the gear must be cycled to ensure the strut engages the stop
under pressure.
o. Retract the gear and check that the up switch is just activated when the gear contacts the stop.
Following this, adjust the switch upward another 0.02 to 0.04 of an inch.
p. Support the gear in its up locked position and adjust the rod end of the actuator piston rod to allow a
minimum of 0.06 of an inch actuator travel remaining with the gear up and locked.
q. Cycle the gear a few times and check down lock, and up stop action, and switch activation. Include
short pickup cycles which simulate gear sag pickup in flight. Leave gear up.
r. Check up switch bracket override action to ensure proper activation.
s. Extend the gear and check that the actuator piston travel remaining till full extension is not less than
0.15 of an inch.
t. Retract and free fall the gear to ensure the retraction link retention spring moves to the assemblies
aft causing the down lock link to fully compress and the drag links to lock in their over center
position.
u. Turn the nose gear full travel and make sure the clearance between the steering arm assembly and
the tiller track is between 0.06 and 0.03 of an inch at both the left and right stops.
(See the Rigging Tiller Track - Steering Arm Assy. Gap view, Figure 7-2a.)
CA
UTION: THE TILLER, TILLER ROLLER, AND STEERING ARM CHANNEL CAN BE
DAMAGED IF NOSE WHEEL TURN LIMITS ARE EXCEEDED WHEN TOWING
THE AIRPLANE WITH POWER EQUIPMENT. INSPECT, ADJUST, REPAIR OR
REPLACE AS REQUIRED.
v. Verify free and correct movement of the tiller roller between the steering arm channel and the tiller
track and up and down the tiller track.
w. See the appropriate paragraph in this section for rigging of the nose gear doors.
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