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Posted for "George/Shirley Shattuck" <kloop@plantationcable.net>:
I have attached a picture of my nose gear hydraulic cylinder attach point to
illustrate the problem. Early on, less than 100 hours, I had delamination
and pretty much destruction of the top of the nose gear tunnel. The two aft
bolts for the attach bracket were very close to the aft edge of the phenolic
block, about 1/4 in, as I recall.
I found a steel strap which I bent and formed to the top of the tunnel. To
the top of that I welded a short piece of angle iron. I bolted the
strap/angle iron to the tunnel (you can see the two bolts/nuts in this
photo) so it fit right behind the header tank. No more problems.
A combination of incorrect adjustment of the linkage, height of the tunnel
and the general geometry of the whole arrangement could have been the cause
of the failure, as Scott Krueger has discussed. Knowing that the attach
bolts were not in the desired location, I built up the top of the tunnel
with additional BID's and flox but the failure still occured. That area is
certainly a place to which a builder should give some extra thought.
George Shattuck
N320GS
I am having great trouble with the Matco nose gear hyd. cyl.
As you can see, with the cyl. (and rod end threads) bottomed out, the
upper brackets are way off the phenolic insert. I use the F45-19 rod end
(seems right).
I have rechecked the pivot pin location, and it corresponds with the
drawing on page 5-44. There is no trouble with the gas strut.
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