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jlfernan
Joined: 10 Jun 2006
Posts: 51
Location: MIAMI
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 Posted: Wed Jan 03, 2007 8:03 pm Post subject: F635 bellcrank |
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I just installed the F-635 bellcrank,
that one that's mounted mid-fuse. The instructions say there should
be no side to side movement. My spacers fit snug and the washers are
tight against the bearing, but if you hold the crank by the long
portion, you get a small amount of movement in the bearing itself.
I posted on Vansairforce.net, but only
got one response. Ken Scott at Vans says it will "probably" be OK. I
hate that word. Before I order any new parts, I want to make sure
that my bearing is bad or not. Any help will be greatly appreciated.
Jorge Fernandez
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_________________
Jorge Fernandez
Supersport
Fuselage/Forward Controls
http://websites.expercraft.com/jlfernan/ |
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lhelming(at)sigecom.net
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| Posted: Thu Jan 04, 2007 1:23 pm Post subject: F635 bellcrank |
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To determine if the problem is in the bearing, you can remove the assembly
and feel the bearing with you fingers and it will wobble around. It should
only turn. No wobble. The bearing structure should be solidly riveted to
the metal sides that it connects to. If the rivets are good and the bearing
still wobbles, you need a new bearing. Larry in Indiana
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steve(at)newtech.com
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| Posted: Thu Jan 04, 2007 3:21 pm Post subject: F635 bellcrank |
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This was a concern of mine also. I have about 3/32" side movement at
the end of the long bellcrank arm. I checked on all of my "reference"
construction sites and most of them had the same small amount of play
and in most cases had a similar statement from Van's that it was
probably alright. I have declared mine to be within my tolerances at
3/32" and just today was able to move the elevator, for the first time,
from the bellcrank.
I did find a potential problem with the push rod though. I had used the
shorter of the two lengths of rod end bearings for my push rod ends. I
was very concerned about the few threads that were in the end cap and
was going to safety wire the lock nut. Then I realized that I had used
the shorter rod end bearings. After changing to the longer ones all is
well. Easily 2/3 of the threaded portion is is the end cap so they
can't un-screw themselves.
Steve Eberhart
http://www.newtech.com/n14se/P1010326.JPG
LarryRobertHelming wrote:
[quote]
<lhelming(at)sigecom.net>
To determine if the problem is in the bearing, you can remove the
assembly and feel the bearing with you fingers and it will wobble
around. It should only turn. No wobble. The bearing structure
should be solidly riveted to the metal sides that it connects to. If
the rivets are good and the bearing still wobbles, you need a new
bearing. Larry in Indiana
---
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Bob Collins
Joined: 11 Mar 2006
Posts: 470
Location: St. Paul, Minnesota
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| Posted: Thu Jan 04, 2007 7:25 pm Post subject: Re: F635 bellcrank |
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I don't recall seeing the side-to-side play notation in the instructions. What page was that on?
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Bob Collins
St. Paul, Minn.
Letters from Flyover Country
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jlfernan
Joined: 10 Jun 2006
Posts: 51
Location: MIAMI
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| Posted: Thu Jan 04, 2007 10:27 pm Post subject: Re: F635 bellcrank |
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The instructions start at the bottom of 8-10 and finish with "...with no side to side play". top of page 8-11.
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_________________
Jorge Fernandez
Supersport
Fuselage/Forward Controls
http://websites.expercraft.com/jlfernan/ |
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Bob Perkinson
Joined: 10 Jan 2006
Posts: 51
Location: Hendersonville, Tennessee
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| Posted: Fri Jan 05, 2007 12:55 am Post subject: F635 bellcrank |
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I would read that to mean that there should not be any lateral movement on
the bearing shaft. I don't think the movement at the tip of the bell crank
is anything to be concerned about unless it is excessive to the point of
binding the rod bearing.
Bob Perkinson
Hendersonville, TN.
RV9 N658RP Reserved
If nothing changes
Nothing changes
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