Wico trackball unit disassembly help

joemagiera

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I've taken apart many Atari style track ball units, but this is the first time I've taken apart a Wico. Do the bearing come off the rollers? On Atari they do, and I don't see anything holding them on the Wico, but they sure don't seem to want to come off.

Also, I didn't know about the small springs that sit in the housing under the bearings (Atari's don't have these, so was not expecting them). Sure enough, either I lost one or it was missing to begin with. I went to the hardware store and they didn't have any perfect spring matches. Has anyone ever sourced the spring size & tension?
 
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