Backcountry Pilot • Swapping out HD lower fork to existing gear tube?

Swapping out HD lower fork to existing gear tube?

Have you modified your aircraft? STC? STOL Kit? Major rebuild from just a data plate?
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Swapping out HD lower fork to existing gear tube?

Hello All,

I recently asked a few questions about a T41 fork but decided not to buy that one as it was only able to take a 15x6 tire and not a 600x6. Apparently the cast T41 fork is just a C150 HD fork and not tall enough. Anyhow in my search and posts a few people came forward with forks I could buy. One is a 310 fork and chrome tube and the other is a 206 lower fork and mounting block only no tube but it comes with the wheel and axle. So my question is, if I chose the second option of just the 206 lower fork, can I just swap it out with my stock C182 fork? I would imagine that the interface woudl be very close tolerance and possibly reamed or honed and worried it may not match up with my stock tube. Also if I did do this, could the nose be lifted (weight on tail) and have the fork casting removed and replaced with the 206 fork without pulling the entire unit?

Other option is the 310 fork with tube and based on my parts book showing the HD option it shows a 310 fork with the fender ears being added in place of the original. Oddly enough the 310 fork block has the scissor mounting points but my parts book appears to show they are not used and the original scissor attachment with the steering is retained just above. Am I reading this dwg correctly? The 206 fork block does not have the scissor mounting points so the original scissor mount would be needed.

Looking for any advice on this as I am sure many have done it already. Plane is a 1973 182P.

Thank you,

Marc
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Re: Swapping out HD lower fork to existing gear tube?

The only way to do it is to remove the strut assembly from the airplane, the chrome tube will most likely depart the aircraft anyway once you remove the scissors. The cast fork won't be easy to remove, and the new mounting block will likely need to be pressed on. Might as well buy a rebuild kit for the strut while you're at it. When lifting the nose I would shy away from placing weight on the horizontal stab to weigh it down, that is very hard on the spar. Instead, find a solid anchor point on the floor to tie the tail down to once the nose is raised.

There is a very good write up on this site for installing an Airglas nose fork, the process is identical for the 2 piece 206/310 nose fork.

https://backcountrypilot.org/knowledge- ... wheel-fork


Matt
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Aircraft: Cessna 172

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