(1) Torque for nut that holds the drive pulley … 68 N·m (50 lb ft)
NOTE: Tighten nut more to get alignment of hole for cotter pin.
(2) Torque for studs that hold the air compressor … 45 ± 10 N·m (33 ± 7 lb ft)
Caterpillar Engines Troubleshooting
Cat Engines Maintenance & Repair Guides