Using Low-Pressure Return Circuit
The electro-hydraulic hitch valve has a convenient port (A) to access the tractor hydraulic sump.
Examples of implements which cannot withstand high pressure applied to both ports are:
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Hydraulic motors which have the return and case drain ports connected. Failure of the motor housing or shaft seals may result if the return line is pressurized
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Remote hydraulic valves located on the implement may allow unexpected movement of cylinders if the return port is pressurized.
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