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Spectrum SD45-2 Cleared for take-off
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Hi there! First off, your DH123 decoder is a silent runner. It does not have back EMF! The DH123 replaces the DH121 decoder in the Digitrax line. Not the DH 163. That is a different animal altogether! <br />Now, to the Spectrum. As you have discovered, Spectrum Steam and Spectrum Diesel have vastly different running characteristics. Steam good, Diesel bad. I have found that to get a Spectrum Diesel running the way you want it to, You have to start at square 1. <br />Remove the shell. If you can, dissasemble the chassis to remove the trucks, drive shafts etc.. Examine everything for factory lube buildup. Clean everything as best you can and relube with a light plastic compatible oil. LaBelle comes to mind. Take care to lube all the bearing points in the drive system. Where the shafts come out of the motor, they pass thru bearings. These are notorious for drying out and making noise. Check the worm gears for fit and again check the bearings. Check the truck gears for burrs. In short, take a tour of the innards of your locomotive and make sure all is as it should be. This is very much like what you would do to an Athearn BB locomotive. A little work will give you a decent running locomotive not to mention the experience you'll get at trouble shooting loco problems. Good Luck!
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