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       #Post#: 1468--------------------------------------------------
       Troubleshooting Lionel 624 Locomotive from early '50's
       By: borderline Date: January 9, 2017, 9:08 pm
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       Hi,
       New here. I have a Lionel O set from the 40's from my Dad. It
       was probably new around 1946 and there's an old steam locomotive
       and a newer ('52-'53) diesel 624 engine that I'm working on.
       It's this one:
 (HTM) http://postwarlionel.com/motive-power/diesels/nw2-switcher/624-chesapeake-ohio/
       It was last used in 1974 when I was about 8. Then it was packed
       up. Now that my son is 6 I'm trying to get it going again after
       40 years of inactivity.
       I'm still using the original transformer which works (0-20 volts
       I think).
       When I started, the locomotive wheels didn't turn and nothing
       happened when I put power.
       Now I took it apart, cleaned and lubricated key areas and now
       the wheels spin by hand. I replaced the lights and they both
       work when power is applied.
       The wheels are not turning at all when power is applied.
       The lights turn on when the reverse lever is in one position.
       When the reverse lever is in the other position, the lights come
       on, there is a loud buzzing, but the wheels are not moving.
       I have read many articles including this one:
 (HTM) http://www.slsprr.net/technical/PopSci%20RefLibr%20No.15.pdf
       but need some guidance on the next step.
       I have tried manually moving the reversing drum mechanism while
       power is applied to be sure that it is not stuck in neutral, but
       that doesn't seem to improve things.
       I'm not sure if power is getting to the armature. Would be
       interested to know how to test that.
       What are the likely culprits at this point, or how can I find
       out what the likely culprit is based on what I've done so far
       and what might normally be done?
       So I guess I'm trying to find out if it's a problem with the
       reversing mechanism (seems unlikely, as no position results in
       wheels turning in either direction weakly or otherwise) or an
       armature issue (more likely but trying to find out how to
       isolate this). I have medium electrical skills and I have a
       voltmeter but need to know what parts to use it on.
       Would be great to get this going again....
       I can add photos as necessary if that will help.
       Thanks!
       #Post#: 1469--------------------------------------------------
       Re: Troubleshooting Lionel 624 Locomotive from early '50's
       By: TrainLarry Date: January 16, 2017, 1:24 pm
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       Here is a sketch of how to wire the motor up without the e-unit.
       This will verify that the motor is good. The motor and armature
       should be cleaned, and the bearings oiled first.
       Larry
       [attachment deleted by admin]
       #Post#: 1473--------------------------------------------------
       Re: Troubleshooting Lionel 624 Locomotive from early '50's
       By: borderline Date: January 21, 2017, 9:42 pm
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       Thanks. So I need to take the two wires from the transformer and
       put them where the two points labeled "field" are connected?
       #Post#: 1474--------------------------------------------------
       Re: Troubleshooting Lionel 624 Locomotive from early '50's
       By: borderline Date: January 21, 2017, 9:58 pm
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       I tried this. Lights came on but no sign of any movement of the
       armature. I had previously taken everything apart and oiled
       relevant parts. Not sure what is the next step.
       #Post#: 1475--------------------------------------------------
       Re: Troubleshooting Lionel 624 Locomotive from early '50's
       By: TrainLarry Date: January 23, 2017, 4:28 pm
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       One transformer wire gets connected to one brush holder (where
       it joins the lamp wire), and the other transformer wire gets
       connected to ground (the point where the field wire gets
       connected to the metal motor frame).
       With a properly lubricated motor, applying power should get the
       motor to run.
       Larry
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