A/C compressor clutch

[Tprjohn]

I have an 85 K10 w/305. Does anyone know if the a/c clutch can be replaced or do I have to replace the whole compressor? The air works great, the clutch is making some noise and has some metal shavings around it like the bearings are going out. Thanks 

[VileZambonie]

The clutch is replaceable however you have to have the tools to change it. The internal nut has to come off and then the tool threads inside while pressing on the compressor shaft. You also need the spanner wrench to keep it from rotating. Make sure the air gap is correct too. I have a few extra compressors kicking around, not sure where you're from but I'd give ya one.

[Tprjohn]

Can this be done with out discharging the system? So the clutch will slide off like a pulley or does it unscrew? I live just north of Montgomery in Alabama.

[VileZambonie]

With compressor secured to a suitable holding fixture and clamped in a vise, remove shaft nut using tools J-25030 and J-9399.



Using tool J-33013-B, remove clutch plate and hub assembly and shaft key






Install shaft key into hub key groove, allowing key to project 3/16 inch from keyway, Fig. 4. The key is slightly curved to provide an interference fit in shaft.
With shaft key and keyway aligned, assemble clutch plate and hub on shaft. Clean clutch plate and clutch rotor frictional surfaces before installation. When installing the assembly, do not apply pressure to clutch hub and shaft.




Using tool J-9480-B, press hub onto shaft until there is approximately .020 to .040 inch clearance between clutch plate and rotor frictional surfaces, Fig. 5.
Install new shaft nut with small diameter boss facing toward crankshaft shoulder, using removal tools. Torque shaft nut to 8-12 ft. lbs. Ensure specified clearance is maintained between clutch plate and rotor.

[Tprjohn]

Thanks VileZambonie, thats just what I needed.