HIGH PRESSURE (HP), CASE DRAIN, AND LOWPRESSURE (LP) FILTERSThe Hydraulic Systems have:- a HP filter in the pressure line, in the reservoir filling system, andthe normal and alternate braking system,- an LP filter in the return line,- a case drain filter in the case drain line of the EDP's and the blueelectric pump.All these filters have a red clogging indicator, which pops out whenthe filter is clogged (dirty) and replaceable filter elementsThe LP filters have replaceable filter elements and a by-pass system.