DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM Hydraulic Schematic IMPORTANT: The fan pump being a gear pump is associated with an open center system. In an open center system the pump flow is constant and MUST be routed back to the reservoir at all times. It can not be deadheaded or serious failures can occur. Fan Pump The fan pump (3) will pull oil from the hydraulic reservoir (14) and direct it to the fan valve (8). The fan valve will direct the full flow of pump into the flow from the spreader pump headed to the filter base (9). The filter restriction is monitored by the filter sensor (11) and is protected by the by-pass valve (10).
The filter directs the flow to the PFC pump inlet and the reservoir tank. A.10.A / 17