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A/C Delete - York Install

scottystills

scottystills

1/2 ton status
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Looking to get rid of my existing A/C compressor in favour of a York style for onboard air. I'm running the old GM diesel, so want to keep things as mechanical as possible instead of adding in some more electrics to fry!

Has anybody done this on a 6.2? I'm wondering about the wiring specifically. There's the power feed going into a relay mounted to the A/C box on the firewall, then connects via a purple wire onto the blower motor. Should I just be taking the relay off the A/C box and mount it somewhere else, or re-route the red wire into the blower? I'm guessing that's going to net me a blower that runs non stop...

Also, anywhere I can buy a pre-fabbed mounting backet for the compressor onto a 6.2? I can fab it, just feeling a little lazy today. :D
 
What compressor is in there now?

If it's an A6, just use the A6. It's 20% more displacement than a York 210.
 
Hmmm... I'm not really sure. Whatever the stock compressor is on an 88 K5 Silverado.

My understanding was that the York had to go in in place, because the R134a lubricates the compressor, but with the absent of the refrigerant and just air going through it will burn out. Is that not the case?
 
scottystills said:
Hmmm... I'm not really sure. Whatever the stock compressor is on an 88 K5 Silverado.

My understanding was that the York had to go in in place, because the R134a lubricates the compressor, but with the absent of the refrigerant and just air going through it will burn out. Is that not the case?
Click to expand...

Nevermind, the A6 was an R12 compressor that wasn't in use by 88 :doah:

Some of the older R12 compressors (such as the Yorks and the Delco A6) had a sump to collect oil that it would splash on the moving parts. It still floated around within the system, so there was no filtration or anything to keep the oil out of the outlet port. The Yorks and Delcos still have to be monitored and they spit out a lot of oil, they just have a better setup due to that sump than newer compressors that don't have any place for oil to collect.

A couple of my Jeep buddies have the stock Sanden (?) compressor and they just modified the internals so they spit out less oil and tapped a grease zerk in the back. They just pump some grease in there periodically and they've had no troubles for years.

To address your original question, I just wired the clutch for my A6 to a pressure switch and a toggle switch for the whole thing. It doesn't pull enough amps that I'm really worried about it.
 
hehe oh no that part I get, I just meant the relay that's mounted on the A/C coil on the firewall and is also wired to the blower motor. Do I just leave that intact?

Found this for some compressor info, but I'll have to go out tomorrow hen it's light out and start scraping crap off the compressor to see what model it actually is. It seems like most of these have their own oil sumps.

http://www.heco.net/maincat/compressors.pdf

Would I be correct in assuming that the older style freon ones might have used the refrigerant for lube? All info on the newer R134a style ones seem to have sumps of their own.
 
Is your compressor now really long with a bracket at the front and another bracket at the rear? Or is it a really short unit (maybe 4-5" from the belt to the rear). You might already have the right one. I just can't remember which came in the diesel model.
 
Longish, bracket in the back.

Still haven't cleaned out last summer's mud as you can see... :waytogo:

IMG-20120214-00073.jpg
 
If I'm seeing it right on my blackberry. That's the one you want for oba. I will look at it at home on the laptop and tell you for sure. I think that's the A4 the log. That one outperforms the york 210 by 20% of volume.
 
mudbuggy said:
If I'm seeing it right on my blackberry. That's the one you want for oba. I will look at it at home on the laptop and tell you for sure. I think that's the A4 the log. That one outperforms the york 210 by 20% of volume.
Click to expand...

That would be GREAT. If you could confirm I'd really appreciate it. With my luck it's the wrong one, but that bracket looks like, well, let's say not fun to accurately fab.

With my luck it's the wrong one, but if it's the right one... maybe I could finally do something "easy" on this K5!

:bow:
 
ok I'm home and have looked at your picture. If your ac lines are connected to the compressor by one bolt in the middle of the lines on a single block then you have an A-6 compressor, your good to go. I couldn't for sure tell if you had in fact an A-6 (which I believe you do) or an A-4 (see attached picture). Both will do the job, but the A-6 will do a better job, longer, more efficiently, you just have to make sure that you occasionally add oil to it manually through the air intake line. Just like using an air tool, occasionally you add oil to the tool before using it. I have attached another picture of my A-6 oba compressor that is sitting in the garage and can easily be spun around for me to show you the back and how the lines fit on the compressor. If yours is like that then it will work, with no problems. If each line is screwed onto the back, it will work, just will need more specific parts, but it will work! The last picture is the plate and piping I did to make mine work (when I install it) so that I can simply attach any black pipe that I need to to the plate instead of tapping out the compressor. Hope this sets you in the right direction!


Well **** I can't upload right now, I'll figure it out and reload them when I can.
 
Last edited:
That's not an a6. I've posted pictures of mine here before about 8 months ago. That's about all the help I can be. The a6 is 6 cylinder, 12ci vs the York 210 which is 2 cylinder 10ci. I'm guessing the a4 would be 4 cylinder and 8ci.

Look at the bottom of the housing. If it has some sort of bowl/depression about 1-2 ounces in volume, it'll probably be a good candidate for OBA.

For your wiring questions, I just took the single hot wire at the pulley clutch and wired it to a switch off a key on circuit on the fuse block. It doesn't pull enough amps that I worried about a relay.
 
The a-4 is about 6" long. The A-6 is about 18" long and heavy, all steel. The originals, aftermarkets make them out of aluminum. Those are the compressors or as close as I could find in a hurry. When I figure out why I can't load up my pictures then you will see how my setup is
 
mudbuggy said:
ok I'm home and have looked at your picture. If your ac lines are connected to the compressor by one bolt in the middle of the lines on a single block then you have an A-6 compressor, your good to go. I couldn't for sure tell if you had in fact an A-6 (which I believe you do) or an A-4 (see attached picture). Both will do the job, but the A-6 will do a better job, longer, more efficiently, you just have to make sure that you occasionally add oil to it manually through the air intake line. Just like using an air tool, occasionally you add oil to the tool before using it. I have attached another picture of my A-6 oba compressor that is sitting in the garage and can easily be spun around for me to show you the back and how the lines fit on the compressor. If yours is like that then it will work, with no problems. If each line is screwed onto the back, it will work, just will need more specific parts, but it will work! The last picture is the plate and piping I did to make mine work (when I install it) so that I can simply attach any black pipe that I need to to the plate instead of tapping out the compressor. Hope this sets you in the right direction!
Click to expand...

Alright, went out to grab a pic to make sure but it looks like the one piece.

IMG-20120214-00077.jpg
 
That's the one that you want. Email inbound, do me a favor, post up the pics so that the next guy can search this thread and learn. Kind of a pay it forward type of thing! You'll see what I mean when you get my email.
 
mudbuggy said:
That's the one that you want. Email inbound, do me a favor, post up the pics so that the next guy can search this thread and learn. Kind of a pay it forward type of thing! You'll see what I mean when you get my email.
Click to expand...

No problem at all!

On a site note, pulling this out... Any way to slowly release the refrigerant from it, or just start pulling that bolt and cross my fingers?

...or do I take it somewhere to let them collect it?
 
not sure what is in there, with that compressor might be r-12 unless there is a sticker under the hood (somewhere) that states that the change over was done from 12 to 134a. In a perfect world you would be able to take it somewhere and they should pump it out for free, but that being said in a perfect world, they might charge you. Me personally, if I didn't know if it was pressurized, I would make damn sure that I didn't breathe any of that crap. If you know for sure that there isn't anything in the line, then just break it open.

Because of the enviromental nazis I can't just say to break the lines open, then I'll get into a hell of a fix, and a buddy of mine did that once and got stuck with a rather large epa fine. So in the spirit of screwing nazis, I would advise you to take it rather slow if you don't know if there is refrigerant in the line. Don't rip the hose off in a mad and hurried rush, just loosen it enough to see if anything is under pressure. If something is under pressure then you know what to do, your a smart guy. If nothing is there then proceed with the oba upgrade.
 
Pictures, courtesy of mudbuggy!

oba1.jpg


[FONT=&quot]oba1 - this is the one that I have under my hood, I will keep this one in it's current postion and then add the other for me to run ac and oba at the same time. I will power it from an auxillary crankshaft pulley that bolts into position inside of the crankshaft pulley and protruds out further then the oem one.[/FONT]

backofA-6compressor.jpg


[FONT=&quot]back of a-6 compressor - this is the back of the a-6 without the ac lines attached. You can see how the o-rings seat around the base of the openings and how little room the ac o-rings need to take up to do their job.[/FONT]

rearofA-6.jpg


[FONT=&quot]rear of a-6 - this is how mine is now, in the garage. I have tested this setup with an electric motor, it was an older style plow electric motor. I figured from the pipe on the back of the compressor, I need to add flex lines next to the other components of the oba system to allow the motor to flex and shake in the motor mount without damaging any of the plumbing of the oba system or any system it comes in contact with.[/FONT]


I'm thinking what I may do is take that backing plate with hard lines and hoses in to a fitting place where I get all my NPT stuff, and see if they can put some fittings onto them that I can connect with a standard air line. On the output side at least. That way I minimize the risk of leaks.
 
mudbuggy said:
not sure what is in there, with that compressor might be r-12 unless there is a sticker under the hood (somewhere) that states that the change over was done from 12 to 134a. In a perfect world you would be able to take it somewhere and they should pump it out for free, but that being said in a perfect world, they might charge you. Me personally, if I didn't know if it was pressurized, I would make damn sure that I didn't breathe any of that crap. If you know for sure that there isn't anything in the line, then just break it open.

Because of the enviromental nazis I can't just say to break the lines open, then I'll get into a hell of a fix, and a buddy of mine did that once and got stuck with a rather large epa fine. So in the spirit of screwing nazis, I would advise you to take it rather slow if you don't know if there is refrigerant in the line. Don't rip the hose off in a mad and hurried rush, just loosen it enough to see if anything is under pressure. If something is under pressure then you know what to do, your a smart guy. If nothing is there then proceed with the oba upgrade.
Click to expand...

I'll call a couple places and see what they say. I do know it's R134a, and I know it's in there. The AC works fine, just don't really need it because in the summer I pull the top off so it's not going to be all that effective!

Anybody need some refrigerant???

The intake side I'm just going to keep a short hose on it a put a breather filter on the end that I can pop off to add some air tool oil from time to time.
 
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