Just curious, do you understand how a "fail safe" thermostat works?
If the "fail safe" thermostat FAILS and never opens, it cannot enter the "locked open" "failsafe" mode. NOT so much failsafe in that situation!
On the other hand, if you break a fanbelt, or some similar catastrophe happens, and the engine gets hott'r than 'ell and the 'stat responds accordingly and opens more than normal a metal locking device keeps it from ever closing again, just before it craps it's guts out from the heat.
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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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