CB360 Swing Arm Bushing / Collar Issue

[ejb]

Hi folks,

I just got to the point with my build where I'm actually starting to put things back together. I figured that I'd start with an easy part and put my shiny new bronze swing arm bushings into my swing arm. Well, it wasn't easy (never is). And I have a problem...

One of the bushings went in fine after chilling it in the freezer for a bit. The other bushing was a real fighter. I finally bashed it into submission but not before bending the flange a little bit (see photo). I didn't think that it would cause an issue because it's just the flange. But it took a lot of beating to get that bushing in... is that normal?
Next comes the real problem... the steel collar won't slide all the way into the arm. I tried both ends of the collar on each side of the arm but there is always resistance. It goes in some of the way so I assume that the bushings are at least the correct size. The collar does appear to be worn.

I'm thinking that it could be that the swing arm itself somehow got warped out of a circle (I had it in a vise but not clamped down hard). Or the bushings got warped as they went in. Or the collar is bent. Even if the collar is really worn, it shouldn't prevent it from sliding into the arm... if anything it would make it easier.

I would appreciate any advice.
Thanks

 

[mydlyfkryzis]

I think you need to get the bushing in further, if possible. The swingarm is a tight fit when they are all the way in as it is.

I don't think the bend, once straightened, then sent all the way home will be an issue.

The caps are the bearing surface for left and right forces. So they need to have full surface contact. The shaft handles for and aft, and rotation.

You may need to find someone with a hydraulic press, and get the bushing down all the way.

 

[ejb]

Thanks for the reply. The real problem is that the steel collar won't fit inside the bushings now that they're in the swing arm. Should I file them a bit or what?

 

[Sonreir]

No. The processes is called "reaming" and it's usually necessary after installing bronze bushings.
Take it to a machinist. It's pretty cheap to get done properly. The machinist can also press the bushing in for you. Don't hammer them as you'll deform the metal.

 

[ejb]

Ok, thank you! Does that collar look like its in acceptable condition?

 

[Sonreir]

Yeah... doesn't look too bad. The reaming should fix any problems that arose, however.

 

[Rich Ard]

Yeah... doesn't look too bad. The reaming should fix any problems that arose, however.

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