Category Archives: Piston Removal

Piston removal

The first job is to clean the bore of the sleeve below the piston,

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then placed the sleeves in containers and flooded the back of them with our Special Brew.

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After only a couple of hours the Special Brew had started to work its way through.

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While these are soaking, Pete machined up a base plate to fit our 20 tonne press, so the sleeves will sit square and hopefully we can push the pistons down out of the sleeves.

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Since it’s New Years Eve, the top shed got a new sign, time for a little light refreshment,

Happy New Year everybody….


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The rear case came of quite easily, we used a chain pull to extract the case through bolts.

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Once all of the bolts are extracted the rear case is lifted off, then the rear maneton bolt is removed, now that was tight!

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The rear row of cylinders can now be lifted off.


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Now it is time to remove the pistons. First we placed in a 20mm spreader  plate on top of the piston, this should spread the up to 20 tonne pressure across the face of the piston.

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After a little pressure the first sleeve gave birth to a piston!

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A couple of the pistons were a bit on the tight side,so we filled the sleeves with special brew and warmed them up in front of the space heater, which worked a treat.

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The last pistons to remove was the master rods 4 and 11, these were a little bit more tricky to clean, as there was less space to work in.

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Pete altered the base plate to allow for the master rod.

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And there we have it, the final piston removed.

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All the children safely tucked up in bed ready for cleaning.