This video is of a job we did start to finish to machine up a hydraulic cylinder barrel for a CAT 631 wheel tractor scraper Apron lift cylinder. We started with the old cylinder barrel and machined out the welds to remove the barrel end and head flange. Heated barrel with flame torch to expand and remove ends. Head flange needed to be bored out, built up with weld and then machined out to suit new barrel tube. Lots of machining to outer diameter of new barrel tube to match OEM standard and interference fit for head flange. Drilled oil ports into new barrel, heated head flange for expansion and fitted to new machined barrel. Then MIG welded barrel ends onto new barrel to finish.

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