Caterpillar 8N8228 Main Bearing PAI 370140OEMCROSS REFERENCE: 8N8228 6N3823 APPLICATION: Caterpillar 3306 Multiple Use Application. DETAILS: Genuine Part BRAND: PAI 370140OEM Caterpillar 8N8228 Main Bearing PAI 370140OEM. USA truck parts and replacement truck parts. Supports rotation and maintains alignment for reliable motion. Genuine part. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of experience in the heavy