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 - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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