I sent this in to V/A for their take on it!
It can be moved anywhere in that line, but in the same place between the components.
You don't HAVE to have a high side fittings.
Martin
In an email or something?
Let's talk AC systems for a moment.
Anybody here really familiar with AC systems in general?
Does it matter where in the high pressure side line the service port goes? Most diagrams have it on the back side of the compressor. That doesn't work so good with the AC compressor on the Cummins diesel engine. Compressor is at the bottom of the engine and not so convenient to get to.
The high pressure side as I understand it, is from the compressor to the condenser, then to the drier and into the evaporator. The orifice tube or evaporator valve must be inside the main unit along with the evaporator.
So, if that is correct, can the high pressure service port be after the drier but before the evaporator?
It'd be ideal if the two service ports were right on the firewall for the ability to actually get to them and keep the install clean.
On every system I have worked on, the orifice tube or expansion valve has been outside the evaporator enclosure. All of the Chevy trucks I have done were orifice tubes and all of the tractors and semis have had expansion valves. I personally like the stupid simplicity of orifice tube systems. The service ports on my 01 burb are right next to the orifice tube, hi side immideately before and low side immedeately after. It's the way they should ALL be set up IMO.![]()
I found a few things out today.
Expansion valve is outside the evaporator enclosure but it is behind the firewall so that is why I wasn't seeing that. Put the box under the dash in a while ago and don't remember exactly what it looks like.
The service ports... Vintage air recommends they be in the hoses that go to the compressor. They do not necessarily need to be directly on the back of the compressor which makes all the difference for this install.
The Cummins compressor works perfectly with the Vintage air parts however for me, I had to order a couple different fittings to make the hoses go where I wanted them to. The service ports they send you in the universal hose kit are a 135 degree fitting. Presumably to bring the hoses forward out of the compressor. I need mine to go back a little bit and loop around.
Soon as my crimper shows up, i'll make up the AC lines and put it together.
From Vintage Air:
We prefer the High side service port to be in the High side gas line from the compressor to the condenser and it can be anywhere in that line. If you have to put the port in the -6 line, it needs to between the condenser and drier.
[FONT="]Mark Hungerford[/FONT]
[FONT="]Technical Support[/FONT]
[FONT="]Vintage Air, Inc.[/FONT]
[FONT="]1.800.862.6658 Ext.172
[/FONT]
www.vintageair.com
Let us know how the crimper works. Been looking at one of those to redo my vintage cars ac units. Change them all over to barrier hoses.
So not to back track but your secretive spline broaching technique. Would it work to do a slip yoke?
Cool. That will be on my short list of new tools I need to pick up.
Where did you get the fittings from?