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 Posted - February 23 2013 : 1:06:44 PM
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I have a Varney Casey Jones steamer. The motor has too much slop and the brush and commutator looses a little contact. Does better in reverse. Should I use a shim on commutator side or the magnet side?
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
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Posted - February 26 2013 : 2:19:56 PM
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I would say it depends. If I remember correctly this is a worm drive loco. first I would make sure the worm and the gear are properly aligned and there is not to much slop there. In some of the locos I have rebuilt I had to us a piece of paper to shim the motor a little to get the correct angle.
Before shimming the motor you will also need to make sure the brushes are in good shape. If they are not worn out then check that the springs on the motor are not week. Just because they hold the brushes down does not mean the make good contact.
If all of that checks out place a drop of oil on the bushing of the motor and run it through a break in period. This should give it some life.
The reason I mention all of this is that if it was running fine and now does not then the slop is most likely not the issue. The slop was most likely there from the start and the gear mesh kept it in check. If there is excessive slop and all other things have been tried then add a shim on the side that allows the com to be centered under the brushes.
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Posted - February 26 2013 : 3:38:30 PM
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If you add washers to the rear of the armature, don't remove it from the field without putting a steel keeper across the back of the magnet.
The Tyco Depot
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