Typical, medium-duty, hydraulic brake system with front discs (red circuit) and rear drums (green circuit). Boost, or assist (blue circuit), is provided by an engine-driven pump, although the power ...

Hydraulic oil ranks high among fluids with multi-function capability. True, for sheer utility, it can’t match olive oil, which through the centuries has been used as food, lubricant, fuel, medicine, ...

Excessive pressures and temperatures, as well as fluid incompatibility, have always spelled trouble for hydraulic cylinder seals. And the problems promise to continue. Tighter emissions regulations ...