2006/01/01 Caterpillar

On-Highway Engine:

3306B DI TA (S/N: 5KD1-UP)

3306B (S/N: 63Z1-UP)

3306C ATAAC DI TA (S/N: 7RJ1-UP)

3306C (S/N: 9TL1-UP; 3KS1-UP; 2AZ1-UP)

3306 (S/N: 76R1-UP)

Truck Engine News SEBD6772, January 2004, "A New Type of Main Bearing is Available". Disregard this article. See the article that follows.

The 4W-5738 Main Bearing is cancelled for the 3300 Truck Engines. The replacement bearing for 4W-5738 Main Bearing is 232-3233 Main Bearing. Do not use the 4W-5738 Main Bearing. Use the 232-3233 Main Bearing. This is available for all 3300 engines.

The material for the main bearing has changed. The old main bearing was a copper bonded aluminum alloy with a lead tin overlay and a steel back. The new 232-3233 Main Bearing has an aluminum alloy and a steel back.

Lubricating 232-3233 Main Bearing is essential before engine start-up. Apply a layer of clean engine oil to the bearing during assembly. Adequate lubrication is essential on all revisions of 232-3233 Main Bearing. This allows the bearing to have enough lubrication before the engine can provide adequate lubrication to the bearing.