When you turn the steering wheel do you feel any surge on the steering wheel at all? When you release pressure on the steering wheel does it move back against the direction you are turning it a slight amount?
Does your tractor have a separate PS pump or does it use a priority flow divider valve?
If it has the flow splitter try operating the power steering while holding the valve for the lift arms in the raise position, continue to hold the valve while the lift arms are stalled out in the maximum raised position. If the PS works while the arms are stalled out and still have pressure applied that indicates a bad regulating valve in the flow divider section of the valve , that is the first valve section on the left side of the valve bank of valves.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
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