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Nose Wheels

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Dick Sipp

Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

Posted: Thu Feb 19, 2009 1:41 pm Post subject: Nose Wheels

To add a little more to the nose wheel discussion:  I asked Rob at Grove for his opinion of the various "fixes"  available.

  

 In his opinion the problem on the 10 and the other  models in his opinion stems from the fact that the bearing seal is rubber rather  than

 felt.  This creates, again, in his opinion  excessive wheel spin up drag which can lead to a for and aft shimmy  condition.  He believes the 10 gear assy 

 is a better designed gear than the others with the  solidly mounted gear leg.  He said while the spinning spacer issue can be  stopped by any 

 method of securing the spacer, screw  whatever,  the other deficiency in the stock design he feels is the fact  that the axle bolt is unsupported and subjected

 to bending loads rather than the bolt being  supported by a collar or spacer and thus putting the bolt under a shear load  only.

  

  

 I did not have any of the issues with the stock  parts in the first hundred hours, but will change to the Grove wheel and axle  assy anyway.

  

 Dick Sipp

 N110DV

  

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bart.van.ruth(at)wxs.nl
Guest

Posted: Fri Feb 20, 2009 12:41 pm Post subject: Nose Wheels

I followed the discussions about the fixes of the  nose wheel  bearing problem.

  The fix I chose is to mount a bushing between  the inner rings of the bearings and make sure that the shaft is a little  short.

  That way the axial preload of the central  bolt  is clamping all inner bushing and rings tightly together so that they  do not rotate.

 Of course I had to test mount and measure the  amount of play in the bearings carefully and adjust the length of the bushing  accordingly.

 This way I will not have any wear and successively  a lot of bearing play witch leads to shimmy.

 Speaking of shimmy, I also replaced the standard  Belleville washer springs  bye much thinner ones. The deflection  on the standard springs is so little that even a minimum wear will  drastically reduce the friction value.  The ones I chose  deflect at least 5 times more and will not effect the friction bye much if some  wear starts to appear.

 I also added bushing to the main gear wheels so  that I can put some real torque on the main nuts and secure the wheel a little  better in spite of the flimsy backup bushing in the rear felt seal.

  

 Bart van Ruth

 PH-USN RV-10 wiring

   [quote][b]

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