(10-03-2022, 08:08 PM)timmyj Wrote: Thanks for all the tips. Not being mechanically inclined I'm going to take it to a
bike repair place and have them replace the derailleur, if that's the problem.
Really like the bike and want to keep it running.
Hey Timmy,
I would still have the bike shop check the derailleur first. It may be perfectly fine except for a servicing which should be less than a new derailleur unless they want to sell you a really cheap model ($25 or so). Those older derailleurs can definitely withstand the test of time when maintained properly, and often even when they were not maintained properly. I figure, unless the cost of the derailleur installation is included, that you will spend in the area of $75 to have the old unit removed and the new unit installed and adjusted. It could be more depending on the derailleur you select as a replacement. You are essentially spending what the overall value of the bike is ($100-$125 in good running condition) to replace what should be able to be removed, serviced (if feasible), and reinstalled for about half the price of getting a new one.
I would also make sure that the shop checks the chain for wear. If it's a little rusty (surface rust) it doesn't mean it is needing replacement. A chain can be serviced also, but often cost of a new one trumps the cost of having an older chain serviced unless cleaning it yourself.
Not saying that you don't need a new rear unit, but I would certainly ask the bike shop mechanics if the unit needs to be replaced, or can it be serviced for continued use. As I mentioned earlier, you may need an entire overhaul of the bike (all bearings cleaned and repacked with grease if no excessive wear, cables replaced, brake pads replaced, etc.); a service that usually costs around $100 or more plus parts.
Also, given that your bike is Chicago made I think that it would pre-1980 which gives it a little more value. A good Schwinn head badge is worth about $5-$10 (or more) alone depending on the year, style, and condition.
Regardless, I hope you get it back on the road for many enjoyable miles to come!