C12.9 Marine Engines Caterpillar

Removal Procedure

Start By:

1. Remove low-pressure aftercooler.

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Illustration 1	g06072158

1. Remove bolts (4) and bracket (2). Remove P-clip (1). Remove bolts (5) and position tube assembly (3) out of the way.
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   Illustration 2	g06072176

2. Remove tube assembly (6). Disconnect tubes assembly (7).
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   Illustration 3	g06072189

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   Illustration 4	g06072197

3. Loosen nut (8). Remove bolts (9). Remove bolts (11) and remove tube assembly (10).
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   Illustration 5	g06072224

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   Illustration 6	g06072240

4. Remove P-clip (12) and P-clip (13). Remove two bolts (14) and two bolts (15). Remove P-clip (17) and P-clip (18). Remove two bolts (20) and two bolts (21). Remove tube assembly (16) and tube assembly (19).
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   Illustration 7	g06072779

5. Remove bolt (24). Remove seventeen bolts (22). Remove oil cooler assembly (25) and gasket (23).
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   Illustration 8	g06072802

6. Remove plug (26) and plug (27). Remove plug (28) and plug (30). Remove adapter (29).
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   Illustration 9	g06072849

7. Remove bolts (31) and washers (32). Remove oil cooler cover (33).
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   Illustration 10	g06072862

8. Remove O-rings (34) from engine oil cooler (35).

Installation Procedure

1. Install engine oil cooler (35) in the reverse order of removal.

   1. Tighten bolts (31) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   2. Tighten plug (30) to a torque of 80 ± 8 N·m (59 ± 6 lb ft).

   3. Tighten adapter (29) to a torque of 60 ± 6 N·m (44 ± 4 lb ft).

   4. Tighten plug (28) to a torque of 31 ± 3 N·m (274 ± 27 lb in).

   5. Tighten plug (27) to a torque of 80 ± 8 N·m (59 ± 6 lb ft).

   6. Tighten plug (26) to a torque of 80 ± 8 N·m (59 ± 6 lb ft).
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      Illustration 11	g06072474

   7. Tighten bolts (22) and bolt (24) to a primary torque of 12 ± 4 N·m (106 ± 35 lb in) in the order depicted in illustration 11. Next, tighten bolts (22) and bolt (24) to a final torque of 25 ± 3 N·m (221 ± 27 lb in) in the order depicted in illustration 11.

   8. Tighten bolts (21) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   9. Tighten bolts (20) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   10. Tighten bolts (18) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   11. Tighten bolts (17) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   12. Tighten bolts (15) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   13. Tighten bolts (14) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   14. Tighten bolts (13) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   15. Tighten bolts (12) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   16. Tighten bolts (11) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   17. Tighten bolts (9) to a torque of 25 ± 3 N·m (221 ± 27 lb in).

   18. Tighten bolts (8) to a torque of 60 ± 6 N·m (44 ± 4 lb ft).

   19. Tighten bolts (7) to a torque of 40 ± 4 N·m (29 ± 3lb ft).

   20. Tighten tube assembly (6) to a torque of 30 ± 3 N·m (266 ± 27 lb in).

   21. Tighten bolts (5) to a torque of 45 ± 5 N·m (33 ± 4 lb ft).

   22. Tighten bolts (4) to a torque of 23 ± 2 N·m (204 ± 18 lb in).

   23. Tighten bolts (1) to a torque of 23 ± 2 N·m (204 ± 18 lb in).