A seal kit to rebuild a leaky hydraulic cylinder is always cheaper than the cost of a new cylinder. But there are times when it is more economical (not necessarily cheaper) to install a new cylinder.
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Rebuilding a dozer’s hydraulic cylinder

A hands-on look at reviving a dozer through hydraulic cylinder repair, focusing on inspection, rebuilding, and reliable ...
I guess the first tip would be to adjust them often, even if they don’t need it, so the adjusters don’t freeze up. Going around during every other service job would be enough to keep them free. So ...
A hydraulic cylinder repair focusing on inspection, machining, and reassembly. What causes failure in high-load cylinder ...
Editor's note: This article has been updated. It was originally published in 2014. “The Lethal Strike.” So named is a video enactment about a shop technician who incurs an injection of hydraulic fluid ...