2170390 Caterpillar Main Bearing for 3406/B, 3408/B, & 3412/B Engines

The Caterpillar Main Bearing 2170390 is engineered to deliver reliable performance in heavy-duty Caterpillar engines, including the 3406/B, 3408/B, and 3412/B models. This precision-crafted main bearing offers robust crankshaft support, ensuring smooth rotation and efficient power transmission. Designed to meet strict Caterpillar OEM standards, it minimizes friction and wear, thereby extending engine life and maintaining optimal performance even under demanding operating conditions.