PIPER SENECA II SERVICE MANUAL
04/30/07 VII - LANDING GEAR AND BRAKE SYSTEM
1K1
x. Lube the system as specified in Section II.
y. Ascertain the gear is down and locked and check alignment of landing gear. See Alignment, below.
z. Remove airplane from jacks.
7-12. ALIGNMENT.
a. Park the airplane on a smooth level floor which will accommodate the striking of a chalk line.
b. Place airplane on jacks and level airplane laterally and longitudinally. (Refer to Leveling, Section
II.)
c. Extend a plumb bob from the center of the tail skid and mark the contact point on the floor.
d. Extend a chalk line from the mark on the floor below the tail skid to point approximately three feet
forward of the nose wheel. Allow the chalk line to pass under the wheel at the centerline of the tire.
Snap the chalk line.
e. Clamp rudder pedals to align in a lateral position. (Refer to Figure 7-3.)
f. Adjust the rod end bearings of each steering bungee to align the nose wheel with the chalk line and
to bring the rudder pedals into neutral angle fore and aft. There should be no load on the bungee
springs. This condition exists when the overall measurement taken between the facing sides of the
washers at each rod end of the bungee is 13.71 inches. To align the nose wheel straight forward,
stand in front of the nose gear and align the center rib of the tire with the chalk line or lay a
straightedge along the side of the tire and parallel with the chalk line. In neutral position, the rudder
pedals are tilted aft as shown in Figure 7-4, with the airplane level. Place a bubble protractor against
a steering tube to check this angle. One end of each steering bungee must be disconnected and the
jam nuts loosened to make this adjustment; do not attempt to make the complete adjustment by
means of one bearing, but divide the adjustment between the bearings at each end of each rod.
Check that the rod ends have sufficient thread engagement by determining that a wire will not go
through the check hole in the rod. Reinstall bungees, tighten and safety the jam nuts.
g. To check the nose gear steering for its correct degree of maximum travel, right and left (see Table
II-III), use the wheel pivot point as the center point and draw a line at the travel degree angle on
each side of the chalked centerline. Use a tow bar to turn the nose gear full travel left and right and
overcome the bungee system. Should travel in one direction be excessive and not enough in the
other, check the steering arm and steering bungees for damage. Refer to Servicing Steering
Bungees, Section II for lubrication instructions of the bungee assemblies.
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