1981 E-350 AC Compressor always on
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New User
Joined: Sep 2014
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From: CO and NM
1981 E-350 AC Compressor always on
Hello! I have a 1981 RV with a E-350 chassis.
The AC compressor always runs, even if the system is off, in vent mode, or AC mode. Eventually all the lines start frosting up.
I even unplugged the compressor and it still ran! Seems the clutch is stuck on.
My question is, can the clutch be removed without discharging the system?
The AC compressor always runs, even if the system is off, in vent mode, or AC mode. Eventually all the lines start frosting up.
I even unplugged the compressor and it still ran! Seems the clutch is stuck on.
My question is, can the clutch be removed without discharging the system?
Laughing Gas
Joined: Apr 2014
Posts: 1,100
Likes: 8
Yes, I have a friend that had to do this on his F250, no problem with getting into the system, the clutch is mounted on the pump shaft.
Some replacement AC pumps are sold with out the electric clutch, so the clutch assembly is available.
Some replacement AC pumps are sold with out the electric clutch, so the clutch assembly is available.
Logistics Pro
Joined: Oct 2014
Posts: 3,677
Likes: 172
Yes. The pulley bearing is probably bad. When ever the pulley is turning, so is the compressor because the bearing is locked up..
Loosen the bolt that holds the pulley on before you take the belt off or you may have trouble getting the bolt loose. If the pulley still tries to turn with the belt still connected, It is probably the pulley bearing turning. Is it does, connect the clutch electrical, turn the ignition switch to run without starting the engine, and turn the AC on. That will engage the clutch and should hold everything good and tight to loosen the bolt holding the clutch plate on.
You will need to set your clutch plate AIR GAP once you have it back together before starting the engine. Actually I glanced at a service manual for the York compressor and I didn't see anything about setting the air gap, but I just glanced at the manual.
Here is the manual in PDF.. Make sure this is your model.
http://www.240.se/litteratur/york.pdf
Here is another site that goes more into detail on replacing the bearing on York compressors
http://www.stu-offroad.com/otherwrit...rkclutch-1.htm
You can replace just the bearing
1981 FORD E-350 7.5L 460cid V8 A/C Compressor Bearing | RockAuto
Loosen the bolt that holds the pulley on before you take the belt off or you may have trouble getting the bolt loose. If the pulley still tries to turn with the belt still connected, It is probably the pulley bearing turning. Is it does, connect the clutch electrical, turn the ignition switch to run without starting the engine, and turn the AC on. That will engage the clutch and should hold everything good and tight to loosen the bolt holding the clutch plate on.
You will need to set your clutch plate AIR GAP once you have it back together before starting the engine. Actually I glanced at a service manual for the York compressor and I didn't see anything about setting the air gap, but I just glanced at the manual.
Here is the manual in PDF.. Make sure this is your model.
http://www.240.se/litteratur/york.pdf
Here is another site that goes more into detail on replacing the bearing on York compressors
http://www.stu-offroad.com/otherwrit...rkclutch-1.htm
You can replace just the bearing
1981 FORD E-350 7.5L 460cid V8 A/C Compressor Bearing | RockAuto
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