If its anything like a 4400 there are a few things to check. One is the linkage. One linkage for each side. The other is the tow valves on top of the hydraulic pump/control unit. There is one for each side. I do not recall right off the top of my head, but both should be orientated the same way. They release pressure on the drive motors. The other is to open up the reservoirs and see if the main drive chain has pop off. There should be two bolts on top that you loosen to slide the cover over to remove it. You will see a three sprocket and chain setup. The large sprocket goes down to the drive motor. The smaller sprockets go to each wheel.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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