Implement Connection, Example 6—Planter with Vacuum Motor and Return Line to Motor Return

RXA0096598-UN-13AUG08

Implement Connection Example 6 (SCV Controlled)

A - Pressure Line

B - Return Line

C - Flow Control Valve (Wide Open)

D - Vacuum Motor

E - Control Valve

F - Lift Assist

G - Markers

H - Extend Coupler Line

I - Retract Coupler Line

In this application vacuum motor (D) receives pressure oil from the retract port of SCV. Return oil is routed to power beyond return port. If return hose is equipped with special planter return hose tip, it can be connected directly to SCV #3 extend port. 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 will cause motor to stop abruptly and may damage seals.

Control valve (C) is wide open and flow is controlled by tractor control panel. If valve is used to control oil flow, pump will operate at maximum pressure which may cause overheating of hydraulic oil if operating at same time outside air temperature is high.

In this configuration, SCV #1 is being used to control both the hitch valve and lift assist. The special 9-pin harness contains a loop circuit that disables tractor hitch control unit when it is connected to 9-pin connector that is wired into tractor main electrical harness.