I havn't had experience with the tractor you have but of all the others I've seen the systems work similar. Propane leaves tank as liquid at about 130psig on an 80f day. When liquid reaches vaporizor,the liquid is converted to vapor and sent to regulator at about 10psig. Some systems have the regulator between vaporizer and carb,others incorprate regulator into carb. Vapor is not under pressure as it leaves regulator. The vacum in carburator pulls and meters vapor acording to need of engine. So as you see no vapor should flow unless engine is running and is never at enough pressure(actualy none)to bubble liquid. I would say the regulator is malfunctioning in this case.
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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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