The OEM
bearings are shielded, not sealed.This permits moisture and debris intrusion, shortening lubrication and bearing
life.That would be the first place to look, RDI
Remove
Disassemble
Inspect.
Sealed
bearings are readily available, inexpensive and worth
the time to
install. The fun part is
getting the clutch
removed from the end of the shaft. :)
Mind your fingers during re-assembly. Those field magnets will pull that armature in at Warp Speed.
RJ
I've asked a couple questions recently about rebuilding the mower motors, and am trying to figure out how badly mine need it.
I currently have two of the larger ones and one of the smaller ones on the tractor - the smaller one is a temporary replacement for a larger one, since the mounting ring on that larger one broke into many pieces. The small one seems to have died this weekend though - it doesn't do anything when powering on the PTO. Nada.
The two larger ones work (as does the third large one that I'll hopefully put back on soon with a replacement mounting ring). But, I doubt they've ever been rebuilt. When I spin the blades by hand, there is some "crunching" (not sure if that's the best description - it's intermittent like something is occasionally grinding). If I try to give them a spin and let go, they immediately come to a stop once I let go. Is that indicative of lots of physical resistance, such as from bad bearings? Hopefully not a bent armature that would need to be rewound?
It seems like that could be draining my batteries faster than if the motors were in good shape.
Thanks,
Mike
Michael S. Briggs, PhDUNH Physics Department(603) 862-2828
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