PARTS AND CASE 6V8589 - Caterpillar

3. Remove bolts (1), (3) and (4) that holds oil cooler (2) to the engine, and remove the oil cooler and bonnets as an assembly. Put marks on the oil cooler and bonnets to aid in assembly.4. Remove bonnet (5) from the oil cooler (2), and remove the O-ring seal from the bonnet.5. Remove bonnet (7) and adapter (6) from oil cooler (2), and remove the O-ring seals from the adapter.6. Use a 3.175 mm (.125 in)diameter rod to clean each tube of the oil cooler. The following steps are for installation of the oil cooler.7. Replace any O-ring seals that are damaged or worn, and put clean engine oil on them.8. Put the O-ring seals on adapter (6), and install the adapter and bonnet on oil cooler (2).9. Install the O-ring seal on bonnet (5), and install the bonnet on the oil cooler.10. Put the O-ring seals in position on the oil filter base.11. Put new gaskets in position on the engine, water pump and the tube, and install oil cooler (2) on the oil filter base.12. Install bolts (1), (3) and (4).13. Check the oil level in the engine. See the Operation & Maintenance Manual.14. Fill the cooling system to the correct level. See the Operation & Maintenance Manual.