C6.6 Industrial Engine Caterpillar

Removal Procedure

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Sulfuric Acid Burn Hazard may cause serious personal injury or death. The exhaust gas cooler may contain a small amount of sulfuric acid. The use of fuel with sulfur levels greater than 15 ppm may increase the amount of sulfuric acid formed. The sulfuric acid may spill from the cooler during service of the engine. The sulfuric acid will burn the eyes, skin and clothing on contact. Always wear the appropriate personal protective equipment (PPE) that is noted on a material safety data sheet (MSDS) for sulfuric acid. Always follow the directions for first aid that are noted on a material safety data sheet (MSDS) for sulfuric acid.

Note: Plug or cap all open ports with new plugs or caps.

1. Drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct procedure.

2. Remove the exhaust back pressure valve. Refer to Disassembly and Assembly, "Exhaust Back Pressure Valve - Remove and Install" for the correct procedure.
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   Illustration 1	g02413837

3. Loosen hose clamp (13) and remove hose assembly (12) from the turbocharger.

4. Remove bolts (6) and bolts (11). Remove tube assembly (5) from NRS exhaust cooler (17).

5. Remove gasket (7) (not shown) and gasket (16) (not shown) from tube assembly (5).

6. Remove bolt (2) from the clip for the tube assembly.

7. Loosen bolts (1) for the support bracket.

8. Remove bolts (4) and bolts (9). Remove tube assembly (8) from the NRS exhaust cooler.

9. Remove gasket (3) (not shown) and gasket (10) (not shown) from tube assembly (8).
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   Illustration 2	g02413956

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   Illustration 3	g02413916

10. Cut cable strap (22).

    Note: Note the position of the cable strap and the type of cable strap installed.

11. Remove bolts (18) and bolts (20) from tube assembly (21). Remove the tube assembly from the NRS exhaust cooler.

12. Remove gasket (23) (not shown) and gasket (19) (not shown).

13. Apply releasing fluid prior to and during the removal of bolts (25). Remove bolts (25).

14. Apply releasing fluid prior to and during the removal of bolts (26). Remove bolts (26).

15. Remove tube assembly (28) from the NRS exhaust cooler.

16. Remove gasket (24) (not shown) and gasket (27) (not shown) from tube assembly (28).

17. Remove the turbocharger. Refer to Disassembly and Assembly, "Exhaust Manifold and Turbocharger - Remove" for the correct procedure.
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    Illustration 4	g02415777

18. Remove bolts (29) and bolts (30) from NRS exhaust cooler (17).

    Note: Support the weight of the NRS exhaust cooler as the bolts are removed. Note the position of different length bolts.

19. Remove the NRS exhaust cooler from the cylinder block.