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How to replace the filter element of excavator?

Air filter element Replace or clean at least every 2000 hours or when the warning light is on. The outer filter element can be cleaned up to 6 times, and then it must be replaced. The inner filter element is disposable and can not be cleaned and replaced directly. If the filter is damaged, it must also be replaced.


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Clean and dry compressed air with a maximum pressure of 5 bar. Do not place the nozzle close to 3 – 5 cm. Blow out the filter from the inside along the folds.


Air conditioning filter element replacement


Replace the filter element every 1000 hours or 5 months. If the filter element is blocked, the air intake will be reduced and the cooling / heating capacity will also be reduced. Therefore, it is necessary to clean or replace them regularly (some brand air-conditioning filter elements are located at the bottom of the rear of the cab).


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Replacement of hydraulic oil pipe filter element


The filter element of hydraulic oil pipeline shall be replaced every 500 hours. Attention should be paid to the following items when disassembling and replacing:


1. When replacing the pipe filter element, use the filter element wrench to turn the filter element anticlockwise to remove it.


2. Fill the new filter element with hydraulic oil and coat the O-ring with hydraulic oil before installation.


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Replacement of fuel filter element


The engine fuel filter element is replaced every 1000 hours. Attention should be paid to the following items when disassembling and replacing:


1. When replacing the fuel filter element, turn off the fuel pipe switch to prevent the oil from flowing out all the time.


2. Use the filter element wrench to turn the filter element anticlockwise to remove it.


3. Apply a layer of fuel on the O-ring seal of the new filter element before installation (do not fill the fuel filter element with fuel, as unfiltered fuel can damage fuel components).



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Replacement of hydraulic oil return filter element


The hydraulic oil return filter element is replaced every 1000 hours. Attention should be paid to the following items when disassembling and replacing:


1. First, release the internal pressure of the hydraulic oil tank.


2. Screw off the hydraulic oil return cover.


3. Remove the spring and bypass valve assembly in sequence, and finally remove the oil return filter element.


4. Install the oil return filter element according to the disassembly steps.


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Replacement of pilot filter element


The pilot filter element is replaced every 1000 hours. Attention should be paid to the following items when disassembling and replacing:


1. Remove the pilot filter element with a wrench and remove the filter cup and filter element.


2. First, install the pilot filter element on the pilot element seat.


3. Apply a layer of lubricant to the O-ring seal of the new pilot filter before installation.



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Replacement of hydraulic oil suction filter


The hydraulic oil suction filter element is replaced every 2000 hours. Attention should be paid to the following items when disassembling and replacing:


1. Depress the air vent to release the internal pressure in the hydraulic tank.


2. Remove the filter element and pull out the oil suction cover.


3. Clean or replace the oil absorption filter element according to the operation hours.


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