Posted by pete 23 on December 26, 2012 at 11:54:48 from (74.32.229.189):
In Reply to: 1466 Draft Control posted by 61-4010 on December 26, 2012 at 11:31:28:
Works very similar to the Deere. That lower link contains a torsion bar which when pulling on the hitch points, it twists that torsion bar. It inturn is splined to a hollow shaft that has a sensing lever clamped to it and moves forward when hitch links are pulled to rear from load. This triggers the draft control valve to raise the hitch until draft load from implement stabilizes again and hitch stops moving. John Deere does same thing but that bar they use bends in the middle when load pulls on the ends. This inturn moves the sensing lever inside and also raises hitch. The IH also will leak from o-rings and requires draining, removing pto unit and getting the tube out to replace o-rings and maybe the bushings. We call them cheaters. Incidentally, new tractors use a pin with a resistor built in that senses the strain on pin, which changes the resistance which changes the voltage at controller which inturn raises hitch to again match the voltage previously seen.
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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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