While removing yokes from their tubes I have seen Loctite used by Piper which suggests that some may again need this. If you discover you have a less-than tight fit on the column tube, use the “Loctite” but clean the shaft and bore and leave out the WD-40 stuff. You’ll have to be swift with the pin-to-hole alignment! If a roll pin feels un-tight when driven, again try the Loctite trick applying to the roll pin.
Another possible problem is hole misalignment like the tube is too long. If you need to shorten the tube to make the holes align try this. To avoid a mess inside the airplane you’ll need a 5-gallon plastic pail, 1-3/4” or larger hole saw, and a sanding disc for your electric drill. Use the hole saw to cut a hole in the bottom of the pail, place the pail over the column tube, use the sanding disc inside the pail [which will retain the trash] to remove material from the end of the tube. Be sure to put a mark on the tube to indicate the stopping point for material removal. De-burr the edge of the tube and continue. Measure the hole location before you start the installation and you won’t have a learning curve repeat session.
Be sure to leave the “bucket with the hole in it” somewhere inside the hangar so as to generate an occasional question. Strong solvents may damage the powder coat finish.
Pertaining to the approval for installation of these “C” model Comanche rams horn yokes. Take a look at the pages from the parts catalog which I have included here for your convenience.
For reference #1 which is the yoke, you’ll see in the note “B” at the bottom of the second page that the solid yoke is no longer available, order “yoke type” [which is now NLA either] 26665-02 as a replacement.
This means a 337 is not required, just a simple log book entry per this reference.