and often other hydraulic systems, as well. The principle is the same for all hydraulics, whether it's in a jack, a car, an excavator or a Boeing: Generate pressure in a cylinder full of fluid ...

Rebuilding the cylinder arm jack involves checking seals, hydraulic fluid, and pressure settings to restore its functionality. With the right repair methods, the excavator jack can operate ...

A worn-out hydraulic jack may seem beyond repair ... With precision machining, seal replacements, and pressure testing, the jack regains its strength to handle massive loads once again.