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Use this guide to service the bolt holder of the 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.
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Unscrew the knob securing the side handle.
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Remove the bolt securing the side handle.
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Remove the side handle.
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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 a pair of snap ring pliers to expand the snap ring on the front of the hammer.
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Remove the snap ring.
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Remove the washer on the front of the hammer.
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Lift the front cover off of the front of the hammer.
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Lift the rubber ring off of the front of the hammer.
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Compress the spring and hold it down while you pull the two retainers out of their slots and remove them.
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Remove the spring guide.
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Remove the spring.
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Remove the front barrel cover.
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Remove the 4 mm hex bolt securing the barrel cover.
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Lift the barrel cover straight up and remove it.
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Use a pair of snap ring pliers to expand the snap ring securing the bolt holder.
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Remove the snap ring.
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Lift the washer off of the bolt holder and remove it.
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Remove four 6 mm hex bolts securing the barrel.
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Lift the barrel straight up and remove it.
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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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Lift the upper-most washer straight up and off of the bolt holder.
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Grasp the bolt holder, rubber ring 24, and the two metal sleeves below it, and lift it off of the cylinder.
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Separate the rubber ring 24 and the two metal sleeves from the bolt holder.
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Separate the rubber ring 24 from the two metal sleeves.
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Remove the rubber ring 24.
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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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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
