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 Posted - September 07 2010 : 8:52:32 PM
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Hey All, I have a Varney " New Haven" switcher, I cleaned up the wheels and all the contacts,and even had to solder some wires back on,but I can't seem to make it go. The light goes on but does not move. Need some help here. 
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Posted - September 07 2010 : 9:32:59 PM
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quote:Hey All, I have a Varney " New Haven" switcher, I cleaned up the wheels and all the contacts,and even had to solder some wires back on,but I can't seem to make it go. The light goes on but does not move. Need some help here.
Originally posted by superhornet1015Â -Â September 07 2010Â :Â 8:52:32 PM
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First things first - from a Technician point of view, try to ELIMINATE as much as possible that can keep the motor from turning over. How to accomplish that? Get a transformer, some wire, two paperclips, and after wiring up some probes with aforementioned hardware, touch the two contacts directly on the motor with the clips with power on full. If the motor doesn't turn over then, try to move the motor armature by finger, see if it's free moving. Bad bearings could be binding the shaft up. If the motor spins freely, and still won't turn with power applied, may need further disassembly to clean the motor armature contacts, the brushes, etc. Bad brushes, springs, etc all can contribute to no motor movement. See if the armature windings are blackened and burnt. If one side is discolored, could be fried.
On some of these old motors, if you don't disassemble it correctly, or don't leave it partly assembled ( ie the armature and magnet and frame together) the magnet will de-magnetize. Try touching a steel screwdriver blade to the magnet, it should stick fairly well. If there's hardly any magnetic attraction, could be the magnet lost it's field, and it won't turn over again no matter what you do.
Hopefully some of this might be of help to you. Try the direct power contact first to eliminate much of the hardware involved, and then go in the direction of the problem - if the motor runs, it's the wiring and wheel contacts. if it doesn't , it's motor related. Let us know what happens. I haven't worked on many Varney's yet, I have a few I acquired and am locating parts for them. Good luck!
Jerry
" When life throws you bananas...it's easy to slip up"
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Posted - September 08 2010 : 06:42:55 AM
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Thanks Jerry, great advice I will also use
Cheers, Ian
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Posted - September 08 2010 : 9:12:20 PM
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Thanks Jerry, I'll have to try that when I can get some time.
Pete
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Posted - September 08 2010 : 9:54:34 PM
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| Sound advice. Touch the wires to the motor. If it runs, work backwards from it to find the source of the problem. Sometimes just getting them started like that helps.
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