Posted by jfharper on November 30, 2012 at 20:49:47 from (173.255.107.30):
The key on my front mount hydraulic pump (3/4" shaft) sheared off and I think it was because the key seat on the mechanical element (drive shaft) has a larger height. The key was a square key, 3/16" x 3/16" x 7/8" (WxHxL). I think the key seat on the drive shaft allowed the key to work itself out until the key sheared off. The shaft on the pump shows a couple chips where the key seat set into...hopefully it is OK.
I was thinking of just getting some key stock that was rectangular, like 1/2" x 3/16", cutting the length I need and then grinding down the height so the key cannot work itself out of the pump shaft key seat.
Question is, should I go with carbon steel or stainless? I want to go hard enough on the steel to handle the torque, but also allow for shearing to avoid damaging the pump shaft if it comes to it. Anyone know or have a recommendation?
My pump is a 1.95 cu in displacement pump, 2300 PSI peak and I have a pressure relief on my valve set to 2150 psi. My tractor is a massey 205 industrial...I have no backhoe, just a 200 davis front loader and 3 pt rear implement with rams for tilting and such. TIA
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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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