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I recently decided to swich from HO to O to build my LAST layout.  I have purchased five engines.  Two, a lionel sd-40 and F3, run perfectly.  Three-a williams SD45, Lionel Trainmaster, and a Lionel GP30, will only move at a crawl even with the throttle wide open.  This is on a test track only 70 inches long with an 80 watt transformer and and brand new track.  Any suggestions?

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Hey Jim, I assume you running w/o a control system (TMCC / Legacy) in conventional. The A to D converter on the DCDS (motor driver) is bad, thus resulting in only 1 speed step: SLOW. If you run with command the loco will operate at all speed steps. However, in conventional mode it will only run slow. If you plan to run only conventional the DCDS will need to be replaced to obtain a full range of speed steps. If you need this done you can contact us at Lionel Customer Service at 586-949-4100 ext 2 M-F 8a to 5p Thanks, Mike
Something is definitely wrong with that Williams loco. It should be a speed demon and barely want to crawl. Because it is conventional electronics should not be the issue. After checking all your track connections you might have to pull the shell off and check for mechanical problems. It should run just fine with your 80 watt transformer.
Originally Posted by Flash:
Something is definitely wrong with that Williams loco. It should be a speed demon and barely want to crawl. Because it is conventional electronics should not be the issue. After checking all your track connections you might have to pull the shell off and check for mechanical problems. It should run just fine with your 80 watt transformer.

I agree regarding the Williams loco. The normal 'problem' with those is in slowing them down, as they normally want to start running even before there is enough power to illuminate the light bulbs. If the lights shine brightly when you run it, it could be something as simple as a lack of lubrication, or carpet fluff etc. jamming up the gears. 

what power supply are you using, exactly.

 

Regardless, the the first thing i would do is actually measure the voltage, on the track, while the locos are "crawling" and you have the throttle at full power?  Are you sure they are really getting full voltage?  It should be close to 18V AC, but if you had a bad joint or junction it might be less.

Originally Posted by jim boyd:

That's what I thought John-except the the Gp30 as Mike said.  ESPECIALLY since 2 of my engines ran fine on it.

Mike could be right on that one, he knows that stuff well.  However, I'd point out that since three engines have the same problem, it's possible it's not any problem with the GP30, but rather a problem with the environment.

 

First thing I'd do is measure the track voltage, and next would be a different transformer.

Originally Posted by jim boyd:

Mike, the GP30 is Seaboard, the trainmaster Reading.  I lubed the trainmaster, and its up to speed,  undoubtedly had just been sitting up a long time.  The only problem with it now, it'll run well, the you hear a schreeching like metal on metal, and when it does, it slows, then when it stops, it picks back up.

Open it up and lube the motor, that sounds like the classic sound of a Pulmore motor with dry armature bearings!

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