Implement Connection Example 2—Pressure Control Valve Applications (Grain Drills or Air Seeders with Constant Down-Pressure System)—Less Hitch—High Flow Hydraulics

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A - Extend Coupler Line

B - Retract Coupler Line

C - Selector Valve

D - Pressure Control Valve

E - Implement Transport Lock Valve

F - Pressure Line

G - Return Line

H - Return Hose Tip

In this application vacuum motor receives pressure oil from the retract port of SCV. Since return oil is routed to extend port of SCV a special return hose tip (H) with check valve is required to prevent high pressure oil from moving back toward the motor and possibly damaging the seals. Another option would be to route return oil to power beyond return port which would not require a special return hose tip. When the motor is shut off, the SCV lever is moved to float position to allow motor to coast to a stop. Moving lever to neutral causes motor to stop abruptly and can damage seals.

For implements using active down force set flow control to continuous and move lever to detent position.

This causes hydraulic pump to operate at maximum pressure which can cause overheating of hydraulic oil if at the same time outside air temperature is high. To avoid this problem, try not to operate more than one hydraulic motor with tractor hydraulic system when active down force is being used.