SFWR GP-A6001 4340158 - Caterpillar

Equipment For Cleaning
It is important that all debris is removed from the oil passages in the crankshaft and cylinder block. Cleaning must be complete and thorough, because cleaning that is not thorough may only result in loosening debris, allowing it to break free and damage bearings and other components after the engine is put into service.
Oil passages must be thoroughly cleaned with brushes to make sure all carbon deposits (sludge) and debris are removed. Good quality brushes are required. The following brushes are available from Caterpillar and are in sizes that will clean all current engine blocks and crankshafts.
When the main oil passage in the cylinder block is cleaned, it will be necessary to weld a 3.18 mm ( 125 ") mild steel rod to the