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Learn precision machining techniques for repairing seized hydraulic accumulators from a Caterpillar 24M motor grader in this 35-minute workshop video. Follow along as experienced machinists tackle the challenging task of removing completely seized end caps from hydraulic brake system accumulators when no replacement parts are available. Watch the step-by-step process of setting up the accumulator in a lathe, using a 90mm BPK spade drill to clear the majority of the seized cap material, then carefully boring out the remaining sections. Observe the delicate moment when the thin remaining layer of the cap finally peels free, revealing the next challenge of damaged and galled threads that could cause future seizures. Discover precision thread chasing techniques used to restore the barrel threads and determine whether the repair will be successful. See the complete process repeated on a second accumulator to maximize the chances of saving both units. Witness the successful extraction of pistons from both barrels and their cleaning process through the hot wash system, setting the stage for manufacturing brand new end caps in the follow-up video.
