Install Shaft Nut
Using spanner wrench to hold clutch hub, install and tighten compressor shaft nut to 10-14 ft. lbs. Using a feeler gauge, check air gap at 3 equally-spaced locations between clutch hub and mating pulley surface. Smallest gap should be .021-.036". To adjust, add or remove shims between clutch hub and compressor shaft.
Tool Reference - No. 2 - Clutch Spanner Wrench