Quoting Removed, click Modern View to seeOk, then I'll assume you have a constant mesh transmission. If the "O" was out of place their would be an oil leak around the pump mounting to the transmission cover case. Next thing I would check is the diverter valve as shown on pg. 103 of JD catalog PC 731. It's mounted in the trans cover, look in the round hole on the Rt. side of the bell housing . Be careful in taking out the bolts , the spring behind it will push it out with some force, you need to see which way the valve is pointed and be sure to put it in the way it came out. I had one valve where the spring was broke. That's where I have found sludge and bits , pieces of foreign material blocking the system. Do not allow the engine to start during the following procedure after you remove the valve , hold a rag over the hole and roll over the engine to clear the internal passage way to the the valve. If this does not fix the problem and you have successfully cleaned the filter, you may well need a pump replacement or repair. Of all the one's I have done, I never replaced or repaired a pump, but that's just my experiences.
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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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