Caterpillar 3389809 Crankshaft Damper PAI 302007CROSS REFERENCE: 10R0706 338 9809 3389809 4P7378 APPLICATION: Caterpillar 3126 C7 3100 Multiple Use Application. BRAND: PAI 302007 Caterpillar 3389809 Crankshaft Damper PAI 302007. Commercial truck parts and USA truck parts. Provides vibration reduction and maintains reliable rotational stability. 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