I have an 85 with normal cooling (not climate control)

Had a supposedly noisy bearing not very high. Thought that the bearing was dry. Disassembled the clutch from thecompressor, greased the bearing and reassembled the clutch.
No more noise.Now the clutch did not engage when putting the AC control on AC.
I have not done anything else than taking the clutch ub of the compressor and cannot find any reason than that it should be an easy task.
The AC worked before I sarted the work on it..

Any advice, recommendation and resolution of the problem will be appreciated

 

Is the gap between the compressor and clutch correct? Too much gap and it may not be able to engage. There should have been shims between the two to achieve correct gap. And dumb question but did you plug the low pressure switch connector back in on the compressor?

 

Check all the electrical connections involved, including the preesure switch, relay, etc.

Earlier today, my 1992 convertible started to blow hot air when I turned on the ignition. A couple of hours of diagnostics by a skilled shop mechanic found that the wire connector to a pressure switch got corroded, and that had caused a relay to fail after a while. He cleaned up the connection, replaced the relay, and everything works just fine.

Jim G

 

I believe you have an Harrison R4 Compressor that requires a tool for removing/installing the Clutch Drive plate.. use that tool set to adjust the Clutch air gap to about .010-.020" there arent any shims for this Compressor, and Make sure you have 12 volts at the connector for the Compressor (measured accross the connector it-self) when the A/C is commanded on.

How did you add Grease to a sealed bearing?

 

Thank you guys.
I have not touched the low pressure switch.
I had a tool to take off the hub, no problem with that.
Reinstalled the hub only with using the centre nut annd it went ok, but the gap is far too uge. May be about 4mm. The nut was at that gap impossible to get screwed in further.
May be I have to have an installing tool??

Many of these bearings are changed due to getting dry. With greasing them they last for a much longer time.
Its easy to take off the seal with a sharp or thin screwdriver or knife.
Underneith you see a nylon spacing device holding the alls correctly. Do not take this out just press the grease with your fingers there are enough space to let the grease enter easily. Reinstall the sealing and install the clutch hub.(where I obviously has made a mistake).
What about the low pressure switch how do I reset it? and is itnecessary to do it as I have not touched anything with the pressurized tubing.
As an apropos to greasing a bearing there is another bearing which tends to dry out and that is the serpentine belt tensioner. They can be noisy and we tend to change them. It is very easy to remove the tensioner and take a way the seal and press some greas in them and noise is gone and the bearing last for a long time after. Have not changed since after years with driving

 

One quick way to check to see if it is an issue with the gap is to turn on the a/c, take a short broom stick and gently tap the clutch. If it engages, then you have a gap issue. Of course, if you do this, be very careful to not let the clutch throw the stick into anything.

 

There is an installer tool. The clearance between the hub and
pulley should be .38mm -.64 mm.

Here's a video that shows the process.

 

Well,, there's your problem. You need to get an installation tool and close the gap. My 95 silverado stopped working at .045" so it doesn't take much.

 

Hi guys .
Thanks a million for the answers which were more than I could wish.
Tomorrow I will make an installation tool and then I hope everything will be ok.
I thought that the crank nut would be sufficient to set the clutch hub to the rigt position, but thats obvious correct.
Thanks again