A/C vacuum? 1990 E-350
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A/C vacuum? 1990 E-350
Have a 1990 ford e-350. old ambulance. when they took the box off they left the lines open underneath. I plugged the hoses and had a vacuum pulled on the unit. Filled then found out they were still leaking. Cut the rubber hoses off and got back to metal and put a screw in it and sealed with jb cold weld. when to refill the system and it seems like it doesn't want to take freon. using duracool. do i need to have the line vacuumed out again, could it be air or am i just doing something wrong?
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Joined: Mar 2005
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From: KY
How are you trying to put gas in the system?
You may know this, I don't know if you do. DON'T, DO NOT, ever put heat on a can of gas with a torch, hot water ect. to get the gas into the system. There is a good chance you will die.
You may know this, I don't know if you do. DON'T, DO NOT, ever put heat on a can of gas with a torch, hot water ect. to get the gas into the system. There is a good chance you will die.
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Joined: Mar 2005
Posts: 1,701
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From: KY
I don't think you followed me. People get the big idea to heat up a can of gas which increases the pressure in the can. The higher pressure in the can makes the gas go into the system faster.
There are blankets for 30 lbs cans but they are made for it.
The actual cans that the gas comes is only rated for like 120lbs. Even on a 4 to 1 safety factor that is 480. If you take a propane torch and heat a can, which has been done, you can spike the pressure well over 1000. Then you have a bomb. Also when you charge with gauges straight out of the can you have to make sure you do not open the high side valve with the can valve upon. The high side pressure will go into the can which can be very ugly also.
Just don't want to see anybody get hurt. If you make the wrong mistake when working on AC systems you can get hurt bad, grave yard bad. There is more danger to it then people realize.
There are blankets for 30 lbs cans but they are made for it.
The actual cans that the gas comes is only rated for like 120lbs. Even on a 4 to 1 safety factor that is 480. If you take a propane torch and heat a can, which has been done, you can spike the pressure well over 1000. Then you have a bomb. Also when you charge with gauges straight out of the can you have to make sure you do not open the high side valve with the can valve upon. The high side pressure will go into the can which can be very ugly also.
Just don't want to see anybody get hurt. If you make the wrong mistake when working on AC systems you can get hurt bad, grave yard bad. There is more danger to it then people realize.
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