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Unread 09/26/2008, 09:11 AM   #113
rvitko
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Join Date: Apr 2000
Location: Austin Texas USA
Posts: 35,785
The most common cause is people overlook the upper bearing and it is cemented to the magnetic rotor by calcium. The upper bearing is part 3000.610, it sits at the bottom of the well.

Other causes could be a bad motor block or the driver having minor water damage or salt creep damage.


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Roger Vitko
Tunze USA

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Current Tank Info: 210 gallon planted tank with Altum Angelfish
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