336E Excavator and 336E MHPU Mobile Hydraulic Power Unit C9.3 Engine Supplement Cooling System Package (Radiator, Hydraulic Oil Cooler, and Aftercooler) - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Remove the hood.
2. Remove the fan and fan drive.

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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.

1. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change" for the correct draining and filling procedures.

2. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct draining and filling procedures.

3. Turn the fuel supply to the OFF position.

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Illustration 1	g02141193

Note: Hose (3) must be checked for wear or damage prior to installation. If any damage is present, the hoses must be replaced.

4. Remove support (2) . Remove support assembly (1) .

5. Disconnect hoses (3) , (4) , and (5) .

6. Remove nuts (6) , the U-bolt, and bracket (7) .

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Illustration 2	g02141214

7. Remove support assembly (8) .

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Illustration 3	g02141225

8. Attach a suitable lifting device to door assembly (9) . The weight of door assembly (9) is approximately 35 kg (80 lb). Remove bolts (10) and door assembly (9) .

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Illustration 4	g02141241

9. Remove tank assembly (14) .

10. Remove bolts (13) and repostion fuel cooler (12) .

11. Disconnect hose assembly (15) . Remove support assembly (11) .

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Illustration 5	g02141263

12. Disconnect brace (17) and repostion.

13. Attach Tooling (A) and a suitable lifting device to support assembly (16) . The weight of support assembly (16) is approximately 24 kg (55 lb). Remove support assembly (16) .

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Illustration 6	g02141273

14. Disconnect brace (18) and repostion.

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Illustration 7	g02182529

15. Remove bolts (19) and plate assembly (20) .

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Illustration 8	g02141597

Note: Check hose (21) for wear or damage. Replace the hoses, if necessary.

16. Disconnect hoses (21) and (22) .

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Illustration 9	g02141765

17. Disconnect clamp (26) .

18. Remove bolt (24) , bolts (25) , and bracket (23) .

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Illustration 10	g02141799

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Illustration 11	g02182660

19. Disconnect hose (34) .

20. Loosen clamp (30) . Reposition clamp (30) and shroud seal (29) . Support fan shroud (27) and shroud seal (29) . Remove bolts (31) , bolts (28) , bracket (32) , fan shroud (27) , and shroud seal (29) .

21. Attach Tooling (B) and a suitable lifting device to cooling system package (33) . The weight of cooling system package (33) is approximately 233 kg (515 lb).

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Illustration 12	g02182659

22. Remove bolts (35) and cooling system package (33) .

Installation Procedure

1. Install cooling system package (33) in the reverse order of removal.

   1. Tighten bolts (31) to a torque of 30 ± 7 N·m (22 ± 5 lb ft).

   2. Tighten clamp (30) to a torque of 5 ± 1 N·m (44 ± 9 lb in).

   3. Tighten bolt (24) to a torque of 30 ± 7 N·m (22 ± 5 lb ft).

   4. Apply Tooling (C) to the threads of bolts (19) .

   5. Refer to Special Instruction, REHS7296, "Instructions for Use of Cat Coolant Conditioner for Aluminum Components" if an aluminum radiator core is used to replace a copper core.