Introduzione
Use this guide to service the piston in a Makita Jack Hammer HM1203C 2010.
Wherever there’s grease, make sure to clean it off and replace it with new grease. The recommended grease is Makita 181490-7.
Cosa ti serve
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Use a Phillips #2 screwdriver to remove the six screws securing the handle assembly.
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Use a small pry bar or flathead screwdriver to pry the rubber front cap off of the hammer.
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Use an angled pick to pull the washer and rubber ring 39 out of the barrel.
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Lift the upper-most rubber ring straight up and remove it from the bolt holder.
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Separate the rubber ring 24 and the two metal sleeves from the bolt holder.
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Use an angled pick to lift the O-ring 35.5 out of its groove on the bolt holder.
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Remove the O-ring 35.5.
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Use a long punch, long flathead screwdriver, or a thin, long bar to push the bolt out of the bolt holder.
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Remove the bolt.
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Use a pick to pry the striker O-ring 31.5 out of its groove on the striker.
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Remove the striker O-ring 31.5.
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Use a 5 mm hex key to remove the six screws securing the aluminum housing.
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Use a Phillips #2 screwdriver to remove the four screws securing the piston cover.
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Use an arbor press and a custom punch to carefully press the crank shaft, bearing, and gear assembly out of the housing.
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If you don't have access to a press or custom tool, use a punch and a hammer to tap the crank shaft until the whole crank shaft, bearing, and gear assembly starts to slide out.
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Use a pick to pry the piston O-ring 31.5 out of its groove in the piston.
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Remove the piston O-ring 31.5.
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Use a pick to pry the O-ring 35 out of its groove in the piston.
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Remove the O-ring 35.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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