Hi Richie, do I understand the Power Steering works fine? Then here is an old post from Bernard for 454 but 574 is the same. I don't know if you want to delve into the MCV valve. I would suggest a repair manual first.
Hi Joe, on the 454, the hydraulic pump feeds the steering in priority, then the remote, hitch, PTO and brake. The flow-divider valve gives 3 GPM to the steering and 9 GPM to the hitch system. When the valve is stuck in the bottom, you have no steering, no PTO and if stuck in top, you have no hitch, no remote. On MCV remove the plug and the spring, put a container under the hole, start the engine and pull the remote lever. The flow-divider valve goes out in the container. Sand the valve with a 400 sand-paper and try again. Change the filter if it's old. May be you have dirt in the oil, check in the filter housing when you open it. When the filter is full of dirt, it have a by-pass valve that open and allow the oil to go direct to the pump via a screen. In this case, dirt can go in the system and cause your problem. Hope this helps you. Bernard le mécano Québec Canada
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