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Makita BDF440 disassemble gear assy, leaf spring, carbon brushes, field problem I Handyman - YouTube
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Amazon.com: Synergy Digital Power Tool Battery, Compatible with Makita BDF440 Power Tool, (Li-Ion, 18V, 3000 mAh) Ultra High Capacity, Replacement for Makita 194204-5 Battery : Tools & Home Improvement
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