GP-9 #42 now back in service. I received the new trucks and installed them en masse, since they were the ones with all brass gears. I also changed out the universal joints for the ex-Hobbytowns, but still had the low speed lurching.
Finally, in desperation, I put shims on the "hot" side of the wheelsets, between the bronze bearings and the back of the wheels, and shimmed the truck sides on the bronze wiper sides, and "Voila!", it worked. Apparently that was the problem all along, the bronze pickup wipers were shoving the insulated wheels against the back of the truck sides and causing a bind. The new trucks are worth it though,, at least the wheels are true, now. I tried #42 on the Humongous industry tracks, but it also has too long a wheelbase for reliable coupling/uncoupling. So the next project will be to get SW-1 #22 back in service. Bob Nicholson ___________________________________________ --- In [email protected], "shabbona_rr" <user141...@...> wrote: > > With the recent increases in business, SHABBONA has found itself short on > power on the 2nd District, so yesterday I tore down RS-3 #35 and cleaned and > rebuilt the drive to remove the granite dust I had been using as lapping > compound to free it up. > > In the process, I found where the drive axles had been rubbing the cover > plates, causing some of the tight running. I files a groove at these > locations with a 3-corner, and now the wheels not only turn free, they have a > semblance of equalization, which helps with traction and power pick up. > > After I got it back together, it runs well, but has a little harmonic whine > at certain speeds when running long hood forward. This is not gear noise, so > I suspect one of the universal drive shafts is a little long and transmitting > motor noise to a gear tower. > > I know a lot of people have little good to say about the original power units > in these early ALCO MODELS engines, but as I have worked with them over time, > they have become to be among my favorite engines. RS-3 #37, for instance, is > virtually as quiet as the AMERICAN MODELS engines. My next project will be to > mount the motors with miniature model aircraft grommets to further insulate > motor vibration. > > SW-1 #22 is still sidelined for heavy repairs, and is sorely missed. Its > short wheelbase makes it more useful on the Homongous Co. industrial trackage > because of more reliable coupling and uncoupling during various switching > moves. It, and GP-9 #42, are still waiting for a slot in the shops. > > That SHABBONA's locomotives have been around longer than most of their > prototype examples is sometimes hard to believe! > > Bob Nicholson _______________________________________________ > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
