The hydraulic pump gears are narrower than the cam gear. The remaining parts of the cam teeth are enough to keep the camshaft turning.
Excessive loading on the hydraulic pump can cause the damage you see in the picture. Most likely the pump gear is a steel cut gear and the cam gear a cast iron gear. A hydraulic system that stays on high pressure will end up with those results.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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