349F and 352F Excavators Engine Supplement Caterpillar

Removal Procedure

Start By:

1. Release the hydraulic system pressure.

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

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Personal injury can result from hot coolant, steam and alkali. At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns. Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand. Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns. Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.

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Illustration 1	g02316073

1. Turn battery disconnect switch (1) to the OFF position.

2. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change" for correct draining and filling procedure.

3. Drain the cooling system coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct draining and filling procedure.
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   Illustration 2	g02333754

4. Remove bolts (2) and sheet assembly (3).
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   Illustration 3	g02333755

5. Remove sheet assembly (4) and sheet assembly (5).
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   Illustration 4	g02333756

6. Loosen clamps (6) and (8). Reposition clamps (6) and (8).

7. Loosen clamp (9) and reposition shroud seal (10).

8. Disconnect harness assembly (11). Disconnect tank assembly (7) and reposition.
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   Illustration 5	g02333757

9. Remove two bolts (13). Remove bracket (12).
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   Illustration 6	g02338497

10. Loosen clamps (14) and (15). Reposition clamps (14) and (15).

11. Disconnect hose (16).
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    Illustration 7	g02333760

12. Remove two bolts (17). Remove bracket (18).
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    Illustration 8	g02338057

13. Remove two bolts (21). Remove bracket (19). Reposition fan shroud (20).
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    Illustration 9	g02338540

14. Disconnect hose (24).

15. Disconnect shroud assembly (23) and repostion.

16. Remove frame assembly (22).
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    Illustration 10	g02338543

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    Illustration 11	g02338544

17. Attach Tooling (A) and a suitable lifting device to hydraulic oil cooler (25). The weight of hydraulic oil cooler (25) is approximately 77 kg (170 lb). Remove bolts (26) and hydraulic oil cooler (25).

Installation Procedure

1. Install hydraulic oil cooler (25) in the reverse order of removal.

   1. Tighten bolts (21), (17), and (13) to a torque of 30 ± 7 N·m (22 ± 5 lb ft).

   2. Tighten clamp (9) to a torque of 4 ± 1 N·m (35 ± 9 lb in).

   3. The clearance between the tip of the fan and fan shroud (20) should be 5.0 to 11.0 mm (0.20 to 0.43 inch). If necessary, loosen bolts (21), (17), and (13) to adjust fan shroud (20).

   4. Apply Tooling (B) to the threads of bolts (2).