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 Posted - July 25 2012 : 7:13:55 PM
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Having trouble keeping brushes in place against springs. Any advice.
Also get power to light but not motor and wires look OK. Any advise.
tyconut
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Posted - July 25 2012 : 7:28:20 PM
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could have wires reversed / crossed to the motor itself, maybe, from the bulb. check continuity between the bulb and each side of the motor, if it's going to both, it's shorted. If there's no diode, I think the bulb must be in SERIES with a single motor wire, not parallel, which means if the bulb burns out, the motor quits working. If you try to make the bulb work across the motor wires, it shorts out the motor. I think.
Far as keeping the brushes in, what I did was cut a piece of thin cardboard with a slot for the armature shaft, put that over the brushes, put the rectangular cover over top the cardboard, then slide out the cardboard carefully. Almost takes 3 hands to do it without the cardboard twisting or popping up and losing the burshess. but if it's stiff enough, it'll hold them down until you can slide it out and get the screws in the cover.
Jerry in Virginia
" When life throws you bananas...it's easy to slip up"
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Posted - July 25 2012 : 8:19:33 PM
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Thanks AMC
Great advise on cardboard cover and will try on next reassembly.
doduff44
tyconut
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Posted - July 25 2012 : 8:39:50 PM
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when i changed the brushes and springs on my Alco C430, i held the spring and brush in with a flat head screw driver tilli got one side on then i did it on the other. It may sound confusing but it worked for me but it may get frustrating if it takes a while 
I buy, repair, and collect
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Hyde.
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Posted - July 25 2012 : 9:13:27 PM
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quote: i held the spring and brush in with a flat head screw driver tilli got one side on then i did it on the other. It may sound confusing but ..it may get frustrating if it takes a while
Originally posted by SCVR66Â -Â July 25 2012Â :Â 8:39:50 PM
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That's why I came up with the very thin, but very stiff, cardboard. Or plastic. Or anything thin, stiff, and you can still cut a slot into it. Works great for me.
Jerry
" When life throws you bananas...it's easy to slip up"
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Posted - July 26 2012 : 09:17:42 AM
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Depending on the PT you may be able to slide the contact with the wire out of place carefully to remove brush and spring then reverse the process.
There's a post on this from long ago here.
Alco Fan
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Posted - July 26 2012 : 8:26:27 PM
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Alco Fan
Tried your method but couldn't get contacts out without ruining so gave up.
tyconut
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Posted - July 26 2012 : 9:37:27 PM
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I haven't had much problem just seating the springs and brushes into the holes in the retaining plate inner face up, and then lower the armature/truck block onto it. The brushes usually stay in place.
The Tyco Depot
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