How should I maintain the miter saw to prevent motor damage?
Regularly clean out sawdust from the motor ventilation slots and ensure proper electrical connections. Clear any chips or dust from the motor air slots to keep things running properly. Maintain the tool by keeping the blade sharp and clean, and follow instructions for lubricating and changing accessories. (Page 2)
From the official Craftsman 137.212290 Miter Saw manual, page 2
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