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Message: <blockquote data-quote="TriHonu" data-source="post: 81773" data-attributes="member: 897">On the older models the valve for the auxiliary hydraulics is either on or off.  The newer models use a proportional valve that allows the operator to control the flow rate from the same switch on the right handle.Those of us with the older models, just add a flow restrictor in one of the lines on the snow plow.  Flow restrictors are a fitting with a small orfice drilled through.  It works just like you pinch off a garden hose.  The excess flow gets directed through the High Pressure Relief valve and returns to the tank.The orfice can be drilled out to the size you want.  Just make sure you debur and clean all the chips before you reinstall.The other option is to add a Hydraulic Needle Valve in one of the lines on the snow plow.  You can then adjust it to the speed you want.   A Needle valve is much more expensive, flow restrictor should be less than $10.Flow restrictors are only used in circuits with intermittent operation.  Continuous operation will cause excessive oil heating. For my plow, I used 1/4" lines going to the cylinders.  This restricted the flow enough for me to control the plow, especially when the oil is cold.</blockquote>