Now that I've had my AC system evacuated, I'm ready to start replacing parts. I've ordered an o-ring kit and plan on replacing as many of those as possible. Once I have everything installed I plan on adding 2 oz. of PAO68 to the drier and 5 oz. of PAO68 to the compressor. I've been told that I should rotate the compressor by hand after adding the oil to prevent hydro-lock. How can I engage the clutch on the compressor in order to do this effectively?

Once I've oiled up the compressor, can I start the car and add R12 through the low side port like I normally would when charging the AC, or should I take it to a shop? Thanks

__________________
'81 300SD