Hangar 9 Piper Pawnee 40 ARF - Manual (Page 15)

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 Step 22
Secure the tail wheel using two 1/16-inch wheel collars
and two setscrews. Tighten the setscrews using the
supplied hex wrench.
Note: Make sure to use threadlock on the
setscrews to prevent them from vibrating loose.
 Step 21
Move the rudder right and left a number of times to
condition the hinges.
Section 1: Landing Gear and Rudder Installation