Automotive Air Conditioning Information Forum

JohnHere wrote: ↑Fri Jul 05, 2024 6:02 am OP, if you have a newer can tap with a flat pin (not sharply pointed) inside, then screw it directly onto the can without the plastic adapter, which isn't needed in this instance.

I actually have both the pointed and flat ended taps.................... I used the pointed one with the blue adapter and it didn't work. I also used the flat tap directly into the new cans

Had a ground issue. Bracket for compressor and alternator is powder coated

Alternator was fine because one of the mounting bolts goes directly into the engine block

Compressor needed a jumper to ground. I mounted the compressor so long ago I forgot all about it

I couldn’t get the Freon to load….. because the compressor wasn’t turning on. Once the system took on enough Freon to match the pressure in the can the Freon wouldn’t flow without the compressor sucking it in.

Still those new cans require a little adjusting to get the Freon to flow. I think the side puncture tap as recommended above might be a better way to go

I have a side tap that I can use. So far I haven't had to purchase any new-type R134a cans.

tbirdtbird wrote: ↑Fri Jul 05, 2024 11:13 am You use vapor to charge to the low side. You never want to charge liquid to the low side, you will blow the comp. Liquid cannot be compressed. The hydraulic principle states that you cannot compress a liquid. That is why all the heavy earth moving equipment like bulldozers and such, along with many other applications, use hydraulic cylinders to get work done.

Under certain circumstances you can charge liquid to the high side, but as John already stated this can have consequences and is not advised for the inexperienced, so I will not go into it any further

Just for the record... I did not resort to liquid charging. Once I found a manifold gauge set that worked and a side tap can adapter, gas charging worked as advertised.

msrichmond, thanks for the forum support. It is appreciated.

Great news!!!!