[R-390] Pinned Down - advice needed

[Charles P. Steinmetz]

Chris wrote:

>On the PTO gear train, the pin diameters are estimated (a 1/16 drill 
>bit shank is too large) at 3/64" and and 1/32".  I checked all the 
>links provided and the thinnest diameter pin punch I could find is 1/16".

Look harder.  I have pin punches down to 0.5 mm (~0.02", or 
1/50").  You are looking for watch or camera tools, not standard 
machinist's tools.

>My ham radio breakfast group, who saw the PTO, pins and all, up 
>close this AM, was quite surprised by the diminutive size of the 
>pins. The consensus at the table was either live with it or try to 
>drill them out.

Pins are made to come out (by pressing, not by hammering), and if you 
slow down a minute and approach the task rationally, you will be able 
to figure out how to remove them without drilling or other ham-handed 
foolery.  If they are solid, they may be taper pins (i.e., they come 
out only one way).  If they are roll pins, they should come out 
either way (they often have a distinct bevel on one end for starting, 
which would tell you which way they were inserted -- but some are 
beveled on both ends).

Best regards,

Charles