5230B Excavator Cooling System Relief Valve - Clean Caterpillar


Cooling System Relief Valve - Clean
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Illustration 1g00818904

The cooling system relief valve is located underneath access panel (1) in front of the engine air cleaner on the upper deck. Clean the relief valve or replace the relief valve if the system overheats or if you observe a loss of coolant.

  1. Lift access panel (1) .

  1. Slowly loosen the radiator caps in order to relieve system pressure. Remove the radiator caps.



    Illustration 2g00818905

    (2) Relief valve for the jacket water cooling system

    (3) Relief valve for the water cooled aftercooler system

  1. Remove the bolts from the valve assemblies and remove the valve assemblies.



    Illustration 3g00686346

  1. Inspect valve (3), valve seal (4), and gaskets (5). If necessary, replace the valve, the seal, or the gaskets.

  1. Inspect valve cover (6) and mounting bolts (7) .

  1. Assemble the relief valve assemblies and install the relief valve assemblies.

  1. Install the radiator caps.

  1. Close access panel (1) .

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