If you are talking about the remote couplers in the back you could put a gauge on a coupler tip and plug in then pull lever to see if you get any pressure. If no pressure you have probably found your problem. Which could be one of several things. I would first start with a filter change and full oil level. Then if no better, look into having somebody with a flow rater check it as you are at that point then. You need to know if when you have pressure how much volume you have at that pressure, and the only way to know is a flow rater. You can pull the pump and check if the nut let the gear fall off and those types of things and get lucky and fix it that way. IT looks to be a similar model to the 74series which has one pump for the hydraulics and it runs everything from the MCV or (multiple control valve) which should be on the left side under your left foot about . IT will be there with a few lines coming off from it. Filter should be bolted to the side of it. 1 bolt will get it off has a steel cover looks something like a grain bin there will be the filter and a screen wash the screen out before you put the filter and screen back in. I usually don't worry about changing the square o-ring under the canister since it is a pain to dig out. If not leaking no sense in changing it. Don't over tighten and crush the canister or it can/will leak and then need replacing.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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