2006/01/02 Caterpillar

Generator Set:

All 3304

All 3306

Industrial Engine:

3304 Diesel

3306 Diesel

Marine Engine:

3304

3306

Engine News SEBD9345, March 2005, "A New Type of Main Bearing is Available". Disregard this article. See the article that follows.

The 4W-5738 Main Bearing is cancelled for all 3300 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.