My bachmann I just received is about 25 yrs old ,like new no ware marks. I pulled out of box and the drive wheels came off. The only thing the box states is OVERLAND 484-UP. CAN THIS BE FIXED,CAN I BUY NEW DRIVES. tHE ONLY OTHER MARKINGS ARE ON THE ENGINE,IT SAYS UNION PACIFIC. THANK YOU..
The only way you can fix it is using Cyanopoxy, this costs $50, which is the same price as a new equivalent loco.
This may have helped you, but it is indefinitely out of stock:
GS4 4-8-4 Drive Wheel Assembly (HO Scale)
Sold Out
* Model: 502XX-6513
* Shipping Weight: 0.088lbs
Here's One on Ebay:http://cgi.ebay.com/HO-Bachmann-Union-Pacific-4-8-4-Engine-and-Tender_W0QQitemZ200433683944QQcmdZViewItemQQptZModel_RR_Trains?hash=item2eaac74de8 (http://cgi.ebay.com/HO-Bachmann-Union-Pacific-4-8-4-Engine-and-Tender_W0QQitemZ200433683944QQcmdZViewItemQQptZModel_RR_Trains?hash=item2eaac74de8)
This resembles your loco right?
(http://graphics.hobbypeople.net/gallery/603714.jpg)
If you are patient, the model can be made to run, but in addition to many hours of your time, it is going to cost you over $100-
You can get another locomotive for about the same price, but the UP Overland is no longer available. It was not an accurate model of a Union Pacific locomotive. So unless there is a great deal of sentimental attachment, I would recommend junking. If there is sentimental reasons, consider using epoxy to put if back together, and using at as a static display piece, like in a park on your layout.
I believe that you have something like this (possibly a different color):
http://cgi.ebay.com/2-U-P-4-8-4-Northerns-for-parts-both-union-pacific_W0QQitemZ160403144772QQcmdZViewItemQQptZModel_RR_Trains?hash=item2558c5c044 (http://cgi.ebay.com/2-U-P-4-8-4-Northerns-for-parts-both-union-pacific_W0QQitemZ160403144772QQcmdZViewItemQQptZModel_RR_Trains?hash=item2558c5c044)
One option is a Bowser chassis - the NYC Niagara version, Northern version or GS4 version can be adapted to your model. Telephone Bowser for availability.
http://bowser-trains.com/hoemrrs/mechanisms/mechanisms.htm (http://bowser-trains.com/hoemrrs/mechanisms/mechanisms.htm)
If it were me, I would purchase this:
http://cgi.ebay.com/HO-Bowser-Cast-Brass-Locomotive-Chassis-w-Motor_W0QQitemZ130365967738QQcmdZViewItemQQptZModel_RR_Trains?hash=item1e5a6acd7a (http://cgi.ebay.com/HO-Bowser-Cast-Brass-Locomotive-Chassis-w-Motor_W0QQitemZ130365967738QQcmdZViewItemQQptZModel_RR_Trains?hash=item1e5a6acd7a)
which is NOT a Bowser chassis, and adapt it. A new motor, flywheel, some NWSL part, and it should work out.