pitts_pilot(at)bellsouth.
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 Posted: Thu Feb 04, 2010 6:55 pm Post subject: Loose Bushing - Was Proper Technique to Tighten Nose Wheel |
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Looking forward to the video!
I'm curious .... how much of the bow is left in the belleville washers
to create 40 lbs of drag??? I looked at the -10 parts list .... I'm not
at the gear install stage yet .... and it lists 2 washers. The Grummans
use 4 or more. Can you still push the nose back and forth to 'park' the
-10 without using a tow bar???
Linn
do not archive
Robin Marks wrote:
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Problem found...
After removing the fairings & lifting the plane I discovered the gear
leg moved left & right approximately 3/4". The movement was quite
noticeable when un-weighted. This was a bit of a shock as to why the
gear leg was so loose. We removed both cowls etc... and found that the
pilots side firewall bushing was somewhat loose in the in the engine
mount sleeve. We tried swapping the bushing left & right but the same
pilots side sleeve did not snugly retain the bushing. In fact the
bushing showed some signs of rotational wear as if it was spinning in
the sleeve over time. After close inspection to make sure the sleeve was
not cracked or misshapen we determined that the solution was to mill a
custom bushing to properly fit the sleeve. After that task was complete
we dry fit the assembly to see what play was left and the gear leg was
rock solid left and right. I can't imagine that sleeve enlarged over
time so it must have been like this from the beginning??? I think we
would have noticed that but at this point I can't promise that is the
case. Regardless the issue may be resolved. I took a video of the
bushing at play but left the camera (along with my airport access card)
at the hangar. I will try and post the video tomorrow for those of you
that don't get out much. I did a quick breakout test using my digital
luggage scale and found the tension required was just under 40 Lbs so
tomorrow we will be playing around with that setting as well.
Thanks for everyone's input,
Robin
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