Engine 01 4 3 4 3 5 2 2 5 1 1 6 01/24/2011 f012192 1. Spring Tensioner 2. Alternator Pulley 3. AC Compressor 4. Fan Clutch 5. Drive Belt 6. Crank Shaft Pulley Fig. 14, Cummins ISC/ISL 01/19/2012 f012182a 1. Fan Belt 2. Alternator 3. AC Compressor 4. AC Drive Belt 5. Fan Clutch Fig. 13, Cummins ISX (2007 or later) Western Star Maintenance Manual, September 2015 01/7