#$%^&*AU2009217448B220140313.pdf#####Active Implement Down Force System Providing Reduced Heat Generation Abstract of the Disclosure 5 A line connects the tractor hydraulic power beyond supply to the pressure reduction valve that is connected to the implement cylinder ends and automatically controls implement down pressure. Fluid under pressure is supplied from a line independently of the tractor selective control valve during automatic down pressure mode operation, the selective control valve can be positioned in a float mode when 10 the down force circuit is controlling implement down pressure. The circuit eliminates a stall signal from the selective control valve to the hydraulic pump that otherwise would cause the pump to rise to the high, heat-producing stall pressure if the selective control valve operated in an active pressure mode.1/1 10 10 r- ------- ---- ~ ----------- -----16 _ _ _ _ _ _ _ _ _ _ _ _ 1 12 12 12 66 FAN I 1 L -------------------------------7 3 90 SCV 84 81 82 880 62 9 i401 700 L54 L - ------ 54 42F- 28 I __ ____ 42 46 562 L_ _ _ _ _ _ _... _ _ ... _ - -. _ _ .J 2 2
