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Mitsuba starter shim pack 850G

Brendan W

Brendan W

Forum Sage
Past Site Supporter
I have a two brush Mitsuba starter motor. There is about 3/8" 10mm end float in the armature and only one lonesome shim at the brush end. I was expecting a bunch of shims at each end and a spring at the drive end. Any thread I've found here has no detail about the how to stack shims apart from replace in same order , which is not much use for this case.:rolleyes: Motor spins ok but there is one spot inside where the armature looks like it could be touching.
Centering the comm on the brushes would seem like a good idea as would taking up float , putting in a spring and leaving 40 thou free ? Why do I think I can't use any old shim but need non-magnetic :confused:
 
The parts diagrams show a shim set; but if you got 10mm float in armature, someone has erred. I'd head to an shop that repairs auto starters- they can correct this slop and center brushes over commutator. You don't want armature dragging on magnets.
 
tom203 said:
The parts diagrams show a shim set; but if you got 10mm float in armature, someone has erred. I'd head to an shop that repairs auto starters- they can correct this slop and center brushes over commutator. You don't want armature dragging on magnets.
Click to expand...

Thanks Tom , had forgotten about the auto electric shop across the river. Now that I think of it I owe him , he fitted a new alternator freewheel on the cage for me for free.
 
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