Maintenance method for hydraulic oil filter element 

1. Remove the hydraulic oil before replacing the filter elements and check the oil filter, oil filter, the pilot filter to see if it is attached to iron scrap copper or other impurities, If any, there may be hydraulic components failure, after troubleshooting, pls clean system.

2. For hydraulic oil when the need to replace all the hydraulic oil filter (oil return filter, oil filter, the pilot filter), or equivalent to no change.

3. Identify the hydraulic oil label, different labels, different brands of hydraulic oil is not mixed, may react from the deterioration of floc. It is recommended to use the excavator to specify the oil.

4. Before the oil must be installed before the oil filter, oil filter cover the nozzle directly to the main pump, into the impurities, then accelerate the main pump wear, while the pump is heavy.

5. Refueling to the standard position, the hydraulic tank generally have oil level table, see the liquid level table. Pay attention to the way of parking, generally all the cylinders all recovered, that is, arm, bucket completely out and landing.

6. After adding the oil to pay attention to the main pump to the air, otherwise the light is no action for the whole car, the main pump abnormal sound (air burst), then the cavities damage the main pump. The method of discharging the air is to directly release the pipe joint at the top of the main pump and fill it directly.