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John T? 460D starter again

R

RBoots

Well-known Member
How about this? This is a pic of the way I had my starter wire up, causing the incorrect rotation. I removed the brush holder springs and pins to be able to try other spots easier. Any way to tell me by looking at what I need to switch in here to change the rotation? What about that Phillips head screw, is that one wire supposed to be hooked there, or onto one of the brushes? This is why I take pictures of this intricate stuff now. I know that I'll know how to put it back together, but then my memory doesn't cooperate, and along with all the other useless info in there, I forget how it went. It almost seems that the brushes and windings can only fit correctly one way. I dunno, I should just stick to the external wiring of the tractor next time. I just don't want to torch what I have by hooking it up even more wrong, if I can help it. Thanks!

Ross
a240413.jpg
 
The silver looking holders are ground, the pinkish looking ones are power from the fields. I think they need to be in opposite positions silver where pink is (on the same side) Jim
 
That's what I was thinking too Jim. I can't quite get the brushes that are grounded switched around that way, there isn't enough cable on them. That's not to say I didn't rivet them on in the wrong location either though lol, I can't remember.
 
Sorry, I'm havin a hard time getting my head wrapped around the pictures, and about all I have to offer I think you and Jim already know IF YOU CAN GET IT TO FIT AND WIRE THAT WAY???

To reverse the rotation you have to get the field current TO FLOW IN OPPOSITE DIRECTION IT NOW IS. I tend to agree with Jim that involves swapping the grounded brushes with the ungrounded ones but not being there no idea how the wire lengths and locations match up. HOWEVER keep the brushes together that are already together be they grounded or to the field winding ends.

PS you mentioned riveting, any chance things got relocated and that's the reason they wont fit swapped as we suspect needs to happen???

All I know for sure is the final ends of all the series field windings need switched side to side BUT HOW????

JIM??? That starter motor is series wound NOT shunt wound like a Generator right???? I think for high current high torque the armature and fields are in series.

John T Sorry not much help on this one
 
Did you also remove the field windings from the case? I would say some how you reinstalled them wrong and now the leads don't allow proper connections for correct polarity. Because I don't see any other holes that the brush holder brackets could be riveted to. For a normal bench rebuild removing the brush holder brackets is not necessary. And unless the field windings are burnt out there is no need to remove those either.
 
No big deal John, I think I can figure it out now. There is plenty of wire there to move the insulated brush holders pretty much wherever I want to. The ground straps are riveted on and I probably did get them in the wrong hole, since I had removed them to clean everything up, and they are so short, they will only go nearest where they are riveted to. Thanks for the help!
 
It was so full of rust from water when the previous owner put a fire out, I just took it completely apart to sand blast the housing and brush holders. The brush holders are in the correct spot, it's the ground wires I have riveted in the wrong hole I believe. I think I need to swap the insulated brush holders with the grounded brush holders, which will work for the insulated ones, they have plenty of wire. The ones that won't allow me to do it, it the little ground straps that go to the other brushes, they are very short. I reriveted them on, and I believe I should have riveted them on the opposite hole of the brush mount that is affixed to the case, which would then allow me enough ground strap to reposition the grounded brushes where I think they need to go. The field windings can pretty much only go in one way, so I'm pretty sure I got those right.

Ross
 
Yep, that makes perfect sense. I did not consider that the ground brushed could be on the wrong rivet. Photos are better than nothing, but hard to beat having you hands on it. Best of luck.
 
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