Engine 01 A B C 09/21/2009 f012181 A. New Belt B. Worn Belt C. Material loss results in belt riding directly on pulley tips. Fig. 3, EPDM Belt Wear 2 1 1 2 A 04/05/2001 f011983 2 1. Stop Bar 2. Idler Arm Stops 04/11/2001 f011982 A. Shoulder 1. Spring-Loaded Tensioner 2. Label Green Zone Fig. 5, Cummins Self-Tensioner Fig. 4, Caterpillar Self-Tensioner Western Star Maintenance Manual, September 2015 01/4