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Message: <blockquote data-quote="12acrefarmer" data-source="post: 116097" data-attributes="member: 20489"><p>I bought a 853H that needs the main relief valve adjusted. I understand how to set the low pressure. To set the high pressure the manual says to turn on the High Flow. There is supposed to be a toggle switch located left of the operator seat to engage the high flow. There is no toggle switch there or anywhere else I have found. Does anyone know how to engage the high flow hydraulics when there is no toggle switch on a 853H?</p></blockquote><p></p>