[R-390] Pinned Down - advice needed

[Barry]

I'm going to guess those are roll pins and they're not too difficult to drive out.  You can get pin punches to do that (not sure where you'd get one but try McMaster if you really want one).  You could probably get them out with a small brad or finishing nail of the correct size.  You might want to blunt the end of a nail first, though, as the point might tend to expand the roll pin.

Good luck,
Barry - N4BUQ


 On Mon 18/06/12 10:02 PM , "Chris Kepus" ckepus at comcast.net sent:
> Various refurb and repair projects are underway in preparation
> (practice)for a newbie to tackle the BIG ONE...a R-390A.  
> 
> Here's the latest.  I'm  working on a device that has a Cosmos PTO, a
> closerelative to that which in our R-390's, that is driven by a rather
> interesting geared system.  
> 
> To get to the point of my inquiry, a number of the gears and levers are
> pinned through their hub to the PTO shaft or idler shafts with mighty
> smalldiameter pins. Based on recent advice given to another refurb newbie,
> pinsfound in the R-390A gear train, can be a pain in the gear, I mean rear,
> evena show stopper.  I need to remove the tiny diameter pins holding the
> gearsand lever on the PTO shaft. 
> 
> Where does one buy the extremely small diameter super strong punches?
> Hasanyone devised a "best" way to remove the pins? Heating the hub?,
> soakingwith penetrant?, drilling 'em out, etc. Yes, I've considered cutting
> themoff with a Dremel with cutting wheel but it would be rather difficult to
> doso without collateral damage.
> 
> If you'd like to see the gears, please Google "ME-398/U", go to the
> photoson Flickr, check out the PTO and close up pics of the gears and levers
> thatare pinned.
> 
> Thanks for any and all ideas. 
> Chris
> W7JPG  
> 
> PS - OT: Is there anyone on this reflector that worked for Cosmos in
> thelate 70's and 80's? Please contact me direct.
> 
> 
> 
> 
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390Help: http://mailman.qth.net/mmfaq.htmPost: R-390 at m
> ailman.qth.net
> This list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html
> 
>