. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Hydraulic Circuit Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11 Neutral Circuits Open Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Complete Fan Drive Systems The Electro-hydraulic (EH) Fan Drive System cools your engine and vehicle sub-systems by controlling a hydraulic pump and motor with a digitally programmable controller. The EH Fan Drive System equipped with the Two Channel Amplifier offers fast, quiet and efficient cooling for engine coolant, hydraulic fluid, charge air and entire engine compartment. Table of Contents Electro-hydraulic Fan Drive benefits include: • Flexible installation for optimum fan location • Elim