C12.9 Marine Engines Caterpillar

Start By:

1. Remove air cleaner.

Removal Procedure

Show/hide table

Illustration 1	g06031953
View from above the high-pressure turbocharger.

1. Remove nuts (1). Remove bolts (2) and remove exhaust heat shield (3).
   Show/hide table

   Illustration 2	g06032029

2. Remove nut (4).
   Show/hide table

   Illustration 3	g06031637

3. Remove bolts (5) and turbo heat shield (6).
   Show/hide table

   Illustration 4	g06032251
   View below the low-pressure turbocharger.

4. Remove bolts (7) and bracket (8).
   Show/hide table

   Illustration 5	g06032280

5. Remove bolts (9). Remove turbo heat shield (10).
   Show/hide table

   Illustration 6	g06033093

6. Remove P-Clip (11) and remove tube assembly (12).
   Show/hide table

   Illustration 7	g06032398

7. Remove bolts (13) and remove heat shield (14).
   Show/hide table

   Illustration 8	g06032430

8. Remove clamps (15) and (19). Remove pipe assembly (16). Remove heat shield (17) and heat shield (18).
   Show/hide table

   Illustration 9	g06032467

9. Remove gaskets (20) from both ends of crossover flex pipe (16).
   Show/hide table

   Illustration 10	g06032481

10. Remove clamp (22). Remove tube assembly (21).
    Show/hide table

    Illustration 11	g06033381

11. Remove bolts (23) and remove tube assembly (24). Remove tube assembly (25).
    Show/hide table

    Illustration 12	g06033397

12. Remove bolt (26). Remove bolts (28) and tube assembly (27).
    Show/hide table

    Illustration 13	g06033589
    View behind the low-pressure turbocharger.

13. Remove bolts (29) and remove tube assembly (30).
    Show/hide table

    Illustration 14	g06033613

14. Remove clamp (31) and rubber coupling (32).
    Show/hide table

    Illustration 15	g06033960

15. Remove clamp (33), nuts (35) and bolts (36). Remove tube assembly (34).
    Show/hide table

    Illustration 16	g06034043

16. Attach suitable lifting device to turbocharger (37). The weight of turbocharger (37) is approximately 25 kg (55 lb). Remove nut (38) and nuts (39). Remove turbocharger (37).
    Show/hide table

    Illustration 17	g06036401

17. Attach suitable lifting device and support the engine as shown to facilitate removal of engine mount (40). The weight of the engine is approximately 1930 kg (4255 lb).
    Show/hide table

    Illustration 18	g06036429

18. Remove cable straps (42). Disconnect harness assembly (41) and position out of the way. Remove bolts (43) and remove engine mount (40).
    Show/hide table

    Illustration 19	g06036782

19. Disconnect tube assembly (44). Remove bolts (45) and bracket assembly (46).
    Show/hide table

    Illustration 20	g06037050

20. Remove stud (48) from the turbocharger.

Installation Procedure

1. Install turbocharger (37) in the reverse order of removal.

   1. Tighten studs (48) to a torque of 38 ± 8 N·m (28 ± 6 lb ft).

   2. Tighten studs (46) to a torque of 38 ± 8 N·m (28 ± 6 lb ft).

   3. Tighten bolts (45) to a torque of 295 ± 30 N·m (218 ± 22 lb ft).

   4. Tighten bolts (43) to a torque of 420 ± 70 N·m (310 ± 52 lb ft).

   5. Tighten nuts (39) to a torque of 75 ± 8 N·m (55 ± 6 lb ft).

   6. Tighten nut (38) to a torque of 75 ± 8 N·m (55 ± 6 lb ft).

   7. Tighten nuts (36) to a torque of 67 ± 7 N·m (49 ± 5 lb ft).

   8. Tighten bolts (35) to a torque of 23 ± 2 N·m (204 ± 20 lb in).

   9. Tighten clamp (33) to a torque of 11 N·m (97 lb in).

   10. Tighten clamp (31) to a torque of 10 ± 1 N·m (89 ± 9 lb in).

   11. Tighten bolts (28) to a torque of 25 ± 3 N·m (221 ± 22 lb in).

   12. Tighten tube assembly (27) to a torque of 40 ± 4 N·m (30 ± 3 lb ft).

   13. Tighten bolt (26) to a torque of 25 ± 3 N·m (221 ± 22 lb in).

   14. Tighten clamp (22) to a torque of 10 ± 1 N·m (89 ± 9 lb in).

   15. Tighten clamp (19) to a torque of 20 ± 2 N·m (177 ± 18 lb in).

   16. Tighten clamp (15) to a torque of 20 ± 2 N·m (177 ± 18 lb in).