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The Makita Jack Hammer model HM1203C is a 20-pound demolition hammer.

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Why is it not hammering

why is it not hammering

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I have this issue. When I took it apart I found a small hole in the piston. This means the it couldn't throw the striker hard enough deadening the blow. I haven't replaced the piston yet but pretty sure that is the issue.

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alex crwdns2934231:0crwdne2934231:0
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