REAR LIGHTING SYSTEM 6K6439 - Caterpillar

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Release latch (1) and open the grille at the rear of the machine.
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Remove pins (2) and (3) from the hydraulic oil cooler mounting bracket.
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Swing hydraulic oil cooler (4) away from the radiator. This will allow access to the radiator for cleaning.
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You can use compressed air, high pressure water or steam to remove dust and other debris from the radiator core. However, the use of compressed air is preferred.Note: Care must be taken when you are using high pressure water. High pressure water can cause damage to the radiator. Using a water spray nozzle on the pressure washer which will disperse the water pressure is preferred.
After cleaning, swing the oil cooler back towards the radiator and install pins (2) and (3) .
Close the grille.ReferenceFor the complete procedure for cleaning the radiator core, refer to Special Publication, SEBD0518, "Know Your Cooling System" for the machine that is being serviced.