Hi all --

I'm in the middle of my radius arm R&R and I have a concern on one of my radius arms. The bearing surface on the RHS radius arm has a large void. Initially I thought it was the result of rust, but there's no metal residue that you'd expect to in a place with rust and grease.

Anyway, please take a look at the attached picture and let me know what you think. Here's a URL to the full-size image: Radius Arm Void

Thanks,
Jeff

 

Just a thought of mine, would it be possible for the grease to maybe mix in with the rusted area? So that the residue is picked up by the grease, thus making it seem like there was not much or any there?

The void seems to be very unevenly shaped. Hmmm...

 

Yeah, after thinking about it and looking at it again I think I'm going to have to find another radius arm. That void is about half the thickness of the casting, making the arm much weaker at the load bearing area where the bearing presses in.

So I guess it doesn't really matter what caused the void, although we both know it's from rust

 

That sounds like a great idea to me! Better be safe than sorry.

 

Give them a proper clean then have the old roller bearing casing removed then install plastic sleeve into raduis arm and then istsall ner roller bearings.............http://www.minispares.com/Product.aspx?ty=pb&pid=37509

 

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You Dont half ask stupid ????.....from what I can see from the rather small pic water has got into the arm.....this can be washed out.....the only part the shaft touches is the bearings...........once stripped down and the old plastic sleeve removed the inner part can be cleaned..then packed with grease and the new plastic sveeve installed then new bearingd installed and them the new arm installed.................I've been doing this for at least 30 years to all my minis and have not had any problems............