Posted by jimg.allentown on September 09, 2014 at 09:57:53 from (98.115.105.174):
In Reply to: R-12 color posted by Tvertiz on September 09, 2014 at 07:20:05:
R-12 and R-134a are both clear in their relatively pure state. The coloring comes from leak detection dye that was added. I used to use charging cylinders for charging A/C units. Those cylinders were clear, so I could see the liquid level inside. Never trust used refrigerant. Even if you did the recovery yourself, you never know what was in the system before it came to you. There have been a host of "drop in replacements" for R-12 since the switch to R-134a. Many contained flammable gases like Butane and Propane. Some also contained other refrigerants like R-22. Most claimed to be "legal" and "drop in" replacements for R-12 as well as claimed to be compatible with R-12 systems and refrigerants. BEWARE!!!
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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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