BEARING-OUTER 6V7968 - Caterpillar

If the spacer is not used, damage to the bolt thread can be the result.
1. Remove hub retaining bolt (1) and washer (3) from the end of the crankshaft. Install a spacer (2), washer (3) and bolt (1) on the crankshaft. The spacer is installed behind the washer to get approximately 3.18 mm (.125 in) of clearance between washer (3) and pulley (4). 2. Install Tool (A). Loosen the pulley from the crankshaft.3. Remove Tool (A).4. Remove the bolt, washer, spacer and crankshaft pulley from the crankshaft.Install Crankshaft Pulley (3304)
1. Install crankshaft pulley (1) on the crankshaft. Install washer (2) with the maximum flat area next to the crankshaft.2. Install bolt (3), and tighten it to a torque of 284 to 340 N m (210 to 250 lb ft). Hit the bolt with a hammer, and tighten it again to a torque of 284 to 340 N m (210 to 250 lb ft).