[alfa] gear work

[GModelle@xxxxxxx]

Digesti,
A typical transmission gear taken from the mainshaft of a spica-era 
five-speed is built of two pieces. There is the gear, meshing with the layshaft, and 
pressed to it over splines, is the toothed engagement ring. The engagement ring 
is similar for all the gears one through five. If the engagement ring teeth, 
splined to second gear, exhibit deformation (wear), it seems that a donor could 
be scavenged from another gear (I've never seen these engagement rings sold 
separately). Has anyone had any luck taking these two pieces apart? 
Thanks, Digest.
modelle
115.01
115.02
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