When the excavator is weak, the handle sinks, and the construction efficiency is low. Generally, if the pressure is abnormal, replace the hydraulic oil return filter element, clean or replace the pilot filter element and oil suction filter element. The pilot filter element is mainly used to filter and collect impurities in the hydraulic oil of the pilot system. The failures often encountered in daily life, such as heavy handle, heavy handle and slow moving speed, are related to it. This article will summarize the cleaning and replacement process of the pilot filter element. As each brand has different requirements for this, it is only for reference.
1. How long should it be replaced
The pilot filter element has a maintenance period. However, the replacement frequency is not as high as that of diesel filter elements. Under normal circumstances, it can be replaced after 2000 hours or about 1 year. However, the time limit should be shortened according to the construction environment and working conditions. If the pilot filter element is not cleaned or replaced in time, the filter element will be blocked or even damaged, causing impurities to flow in the pilot oil circuit, and the gear pump and regulator will be worn to varying degrees.
2. Cleaning or replacement process
First, clean up the impurities and sundries near the oil tank. Do sufficient preparations before operation. The process of removing the pilot filter element is relatively simple. First, open the side cover next to the pump, remove the external protective cover of the pilot filter, and then take out the filter element. If the filter element is not dirty, it can be thoroughly cleaned with clean oil before continuing to use. If it reaches the maintenance time, it can be replaced directly.
