Monday, May 2, 2011
Tail Wheel Spring Back Off
After downloading and reading Neal Wright's article on tailwheel springs I took the spring back off. At least I have the correct springs. There were 2 parts missing, the aluminum steering spring guard and the steel piece inside the abrasion strip. Those have been fabricated and installed. Also the pin on the shackle assembly which goes in the 1/4" hole in the 3rd spring was ground off years ago when someone installed a spring without the hole. The hole keeps the shackle from sliding off the spring stack. Rather than machine a new riveted pin I used an 8-32 socket head cap screw and AN365-832 nut. The 8-32 screw fit the 5/32" rivet hole in the shackle piece and by just turning the knurle off the head of the screw it fit a 17/64" hole in the spring. Since there was no hole I decided it was as easy to dirll it to to have the same clearance with a hole 1/64" larger. If the screw wears it is easy to replace it. As suggested in Neal's article, I also replaced the main 5/16" bolt with a 3/8" bolt. Since the hole in the support was 3/8" it seamed better to have a snug fit. All this required longer bolts to fit properly. The cross bolt in the shackle is now an AN4-22A. The main bolt is an AN6-22A and the bolts in the rear support are AN3-18A with the heads down. It's all back on the plane. On to the tailwheel.
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