Re: (ET) Mower motors - should they spin freely?

["Briggs, Michael" <Michael Briggs unh edu>]

Thanks RJ. Are these the correct bearings?

http://www.amazon.com/SKF-6204-2RSJ-Bearings-Clutch-Release/dp/B000CKNXCA

I've seen some descriptions of how to get that clutch removed -sounds a 
little tricky. A video sure would be nice. :)

Thanks!
Mike

________________________________
Michael S. Briggs, PhD
UNH Physics Department
(603) 862-2828
________________________________

________________________________________
From: RJ Kanary [rjkanary consolidated net]
Sent: Thursday, April 28, 2016 10:12 PM
To: Briggs, Michael; et
Subject: Re: (ET) Mower motors - should they spin freely?

             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


On 4/28/2016 9:59 PM, Briggs, Michael wrote:


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, PhD
UNH Physics Department
(603) 862-2828
________________________________



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