Is it possible to get to the A/C compressor clutch without taking the compressor off of the engine?

First, that raises the question of why did you replace the orifice? Was it full of metal particles? Like possibly a failed compressor?

Then, why are you trying to put oil in it? I seiously doubt that there was much oil loss in just replacing an orifice (maybe 1/8 ounce?) Unless you flushed the system, there shouldn't be any need to add any oil at all.

Did you actually check the clutch coil to see if it was any good? Is it possible the clutch is burned up?

Then there is the question of how did you go about "bypassing" the compressor? You do understand that the clutch is controlled by the A/C compressor clutch relay, which is controlled by the Powertrain Control Module? Poking around on the wrong wires with the wrong setup can cost you a PCM in a heartbeat.

Then there is the question of which engine your Expedition is equipped with, and whether it is equipped with manual or automatic temperature control...these systems operate completely different and are set-up differently for the various engines available that year.

Put a jump wire in the high pressure switch plug. If the compressor works. replace the high pressure switch. Let me know and we can go from there.

Possible that the compressor is jammed or struck and causes a high friction on the drive that the engine stalls on idling.
Remove the belt off the compressor to confirm and confirm the jamming with a manual check. now start the engine to confirm that it revs up freely.
You might have a faulty compressor unit which needs a very serious look, take estimate before deciding to repair or a replacement would be ideal. Also check the solenoid clutch.

It is possible to change the clutch out if you can find someone who will sell them. Check out some place like surpluscenter.com, check out the power transmissions tab, and click on clutches, and you may find one. Otherwise, it's difficult to find the clutches by themselves. You'll need a puller to get the old one off.

I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

The only thing that would prevent you from doing so, would be the ammount of room in front of compressor that you will need for the tools. Other than that shure.

u need a speacial tool clutch tool removel tool

I AMA MASTER VOLVO ASE TECH AND RUN A JUMPER WIRE FROM A/C COMPRESSOR WITH A/C ON MAX TO POS BATTERY AND SEE IF COMPRESSOR CLICKS ON AND IF A/C RELAY GETS HOT IT IS POSSIBLE A BAD COMPRESSOR OR DOES THE FAN COME ON WITH A/C ENGAGED THE FAN IS A TWO STAGE UNIT ON 850,S ONE IS THE ENGINE TEMP RED AND THE GREEN IS FORTH A/C SYSTEM

Sounds like it is more likely the high pressure switch on the accumulator acting up (a common issue with older vehicles). To verify this, try putting 12v on the clutch with a jumper (but only for a few seconds each time) to see if it engages. If it is the pressure switch, you may have to replace it and the schrader valves as well.
If the problem is an electrical connection in the clutch, yes, it can be replaced without removing the compressor but that must be done very carefully.

you can buy a puller for this,and i think it can be done in truck