excellent but couldn't understand how the high pressure gauge measures the pressure while it is closed & does not allow the refregerant to reach the high pressure gauge ???
You also forgot to remove the black exhaust cap off pump. I may have commented in error,, another video I saw, the pump had a black cap that needed to be unscrewed so exhaust could escape. Perhaps the pump you used was different.
Each can manufacturer is different, make sure you always read the instructions on the can. In this case it said to turn the can upside down and rotate back and forth 90 degrees.
I did, most auto parts stores that rent equipment also have vacuum pumps to rent. I assume that's what you were referring to. I did not replace the compressor.
After pulling that vacuum, would you not also have to add oil, and if you like, leak detector dye, into your system? I can't think of a better way to ruin your compressor than allowing it to run without lubricant. "oil charge" or "oil/dye injector"
Must freon cans purchased from an auto parts store contain a bit of oil. I also know that dye was installed before, and my intention wasn't to find the leak, but to get me through until I pulled the system entirely. But you're right, dye is essential for locating leaks, and if replacing a component like the compressor, oil is recommended for sure! Thanks for the comment!
These specs can be found on the internet and are generally the same for most vehicles. Must of the time higher than about 40% off the dials would mean a restriction on flow and would require further service.
Turned out to be a leaking service port valve, pretty common on slow leakers, and almost impossible to notice with gauges connected. Because the valve itself was leaking, there's no rush of pulling in contamination while pulling a vacuum. Thank for the comment though!
Generally ok, but since you're dumping liquid refrigerant straight into the low side be aware that you just may hydraulic lock the AC compressor (and damage it) if it's close to the inlet port, as you initially inverted the refrigerant can. It may be a quicker way to charge a system but it could also cause damage to the compressor.
