I have 2 Delco 1107165 6v starters for a 420 430. One spins correctly-CCW. The other spins CW (clokwise)What would cause this and whats the fix? The one that spins CW did not spin at all when received. I installed a new stud, new brush plate w/new brushes, springs etc. Now it spins great but the wrong direction CW, so the drive does not kick out. I reversed connections from the battery and it spins CW either way.
- Thread starter Randy G
- Start date
wore out
Well-known Member
The brush holder needs to be somehow rotated 90º in relation to the field coils/"belly" of the starter. (90º in either direction from where it is.
Did you change the complete cast iron "end frame"? It's possible the one you installed has the locating down 90º from where it needs to be.
Did you change the complete cast iron "end frame"? It's possible the one you installed has the locating down 90º from where it needs to be.
Randy< being the starter is an electromagnetic field versus a permanent magnet the only way to reverse its direction is to reverse the orientation of the fields and armature (BRUSHES) so if the brush plate is 180 out or its wiring connections were swapped that could be the problem.
John T
John T
I did notice the new end frame(brush plate) connections were 90 degrees off. Its the only way the thru bolts would line up w/the nose cone. So thats the reason it spins backwards? The + connections(insulated from the frame) were where the - connections were compared to the old one. I did wire it up to the coils correctly. So the 90 degree difference is the problem?
I'd try driiling new holes but its 1/4 " cast iron. Afraid drilling it by hand would render bad accuracy. If I had a drill press I'd try. The old frame was wollered out causing the armature to "flop around" when spinning. It had an oiler and no bushing. Guna try to ream out old frame and install a bushing 1st. Then try drilling new holes. Always wondered if a starter could be made to reverse direction. Thanks for the education and advice.
buickanddeere
Well-known Member
Reverse the polarity of the fields or reverse polarity of the rotor , but not both to reverse the rotation.
Russ from MN
Well-known Member
- Location
- Bemidji MN
My buddy got one back from a repair shop once that did that, we switched the wires around to the brushes and it worked fine.
Well I did drill the brush plateframe. It had indentations on the inside of the new plate as to where to dill. Rotated it 90 degrees and SUCCESS!Spins CCW and drive kicks out like it should.
John T, can you explain to me why and how moving the brush plate 90 degrees makes the starter reverse? Send me an email if desired.
RANDY IF YOU SWAPPED WIRES from one brush to the other to me that gets the same result as if you rotated the brush holder ninety degrees> what you have done is change the relationship of the field and armature< that make any sense ?? if not i will take another crack at it lol The fields have a certain north south magnetic polarity but with the brushes which pass current through the armature wire swapped or rotated that chamges their north south magnetic polarity so she turns the other direction SOMETHING LIKE THAT
John T
John T
buickanddeere
Well-known Member
hanged the polarity of the rotor.
Brownie450
Member
Interesting read.
My guess is that the new brush holder/ end plate
might be for a starter that was used on a combine
engine, since the starter is on the opposite side
of the flywheel in that application.
Jim
My guess is that the new brush holder/ end plate
might be for a starter that was used on a combine
engine, since the starter is on the opposite side
of the flywheel in that application.
Jim
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