C3.3B Tier 4 Interim and EU Stage 3A Engines for Caterpillar Built Machines – Radiator and Hydraulic Oil Cooler – Remove and Install

Removal Procedure

Start By:

  1. Release hydraulic system pressure.

------ WARNING! ------

At operating temperature, the engine coolant is hot and under pressure.

Steam can cause personal injury.

Check the coolant level only after the engine has been stopped and the fill cap is cool enough to touch with your bare hand.

Remove the fill cap slowly to relieve pressure.

Cooling system conditioner contains alkali. Avoid contact with the skin and eyes to prevent personal injury.


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

    Illustration 1g02799166

  1. Open door assembly (1) .

    Illustration 2g03396564

  1. Disconnect strap (2) and gas strut (1a) not shown. Remove bolts (3). Use two people to remove grill assembly (4). The weight of grill assembly (3) is approximately 23 kg (50 lb). Remove bolts (5) .

    Illustration 3g03396578

  1. Disconnect hose assemblies (6) and hose (7) .

    Illustration 4g03396579

  1. Disconnect hose assembly (8). If equipped, disconnect hose (9) .

    Illustration 5g03396580

  1. If equipped, disconnect hose (10). Remove clip (11) .

    Illustration 6g03396582

  1. Disconnect tube assembly (12) .

    Illustration 7g03396584

  1. Disconnect hoses (13) .

    Illustration 8g03396586

  1. Disconnect hose assembly (14) .

    Illustration 9g03396590

    Illustration 10g03396593

  1. Remove bolt (15) and nuts (16). Repeat this step for the opposite side.

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