Old, as another poster said, check the hold down clamps and the gaps on the guards. Sometimes on worn guards and lots of grass in the bottom of the hay, the knife will pull the fine grass thru the gap in the guard and widen it. Inspect the guards and tap the tops down with a hammer to close the gap. On the older IH mowers all knives and guards were the same but later on in the 1960s IH released a triple knife for the out end and a stubby guard for the outer end that was supposed to prevent plugging and trailing on the swath board. IH also release a rock guard and a heavier serrated knife for farms that had small rocks. We had a IH C-28 3pt mower for many years and I cut many acres with it. Broke many knives, guards and a few pitman sticks.
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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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