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Posted by on September 30, 2008, 3:05 am
robertnewman@shmaz.com wrote:
> Four year old mower, have replaced the three mandrel assemblies once
> each, now all three are making grinding noise again. The manual shows
> two bearings, and I was thinking maybe I could replace the bearings
> rather than replacing the entire mandrel assembly and save some money.
> Do you feel this is a realistic alternative? Once I solve this
> grinding problem, how do I prevent the bearings from failing again so
> soon?
> Maybe a different supplier mfg's a better bearing?
> I probably could do a better job of cleaning the underside of the deck
> after each use but still wonder if i can't protect the bearings from
> moisture better than a 30 minute cleaning after each use. There has
> to be a better way!!!
If you pressure wash the deck you may be forcing water into the spindles
( I assume that's what you mean by mandrel ) and thus ruining the
bearings. Frequent bearing failure can also occur if you tighten the
blades past the recommended torque setting or by not torquing the blade
nuts enough. By over torquing you put too much pressure on the bearings.
By under torquing you allow the g forces of the blade rotation to cause
the blades to over tighten thus causing premature bearing failure.
Unbalanced blades can also cause this, though you would probably notice,
immediately, the vibration from blades out of balance enough to affect
the bearings.
Another solution, buy a better mower than a Crapsman.
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