(3) The oil level in the hydraulic tank is too low
If there is too little oil in the hydraulic tank, the hydraulic system will not have enough flow to take away the heat generated, causing the oil temperature to rise.
Precaution:
During actual operation and maintenance, strictly abide by the hydraulic oil level regulations in the operating procedures. For example, a pc2003 hydraulic excavator experienced a high hydraulic oil temperature failure after working for a period of time. Check the hydraulic oil tank and found that the oil level was much lower than the specified value. Due to the excessive lack of oil in the hydraulic system, the hydraulic oil circulated too fast and failed. It can fully stand and dissipate heat, resulting in an increase in oil temperature; after adding enough hydraulic oil as required, the hydraulic oil temperature immediately drops to the normal range.
(4) Variable vane pump air mixed in the hydraulic system
The air mixed into the hydraulic oil will escape from the oil and form bubbles in the low-pressure area. When it moves to the high-pressure area, these bubbles will be crushed by the high-pressure oil and undergo rapid compression to release a large amount of heat, causing the oil temperature to rise. rise.
Precaution:
Always check the sealing of the oil inlet pipe interface and other seals to prevent air from entering; at the same time, drain the air from the system after each oil change. For example, the hydraulic oil temperature of a py184 grader was too high, accompanied by hydraulic noise; the inspection found that the hose connecting the oil inlet of the hydraulic pump was slightly damaged, and air was sucked in, causing the oil temperature to be too high. After replacing the hose, the grader In good running condition.
(5) The oil filter is clogged
When abrasive particles, impurities and dust pass through the oil filter, they will be adsorbed on the filter element of the oil filter, causing increased oil suction resistance and energy consumption, causing the oil temperature to rise.
Precaution:
Clean and replace the oil filter regularly. For oil filters with clogging indicators, the filter element should be cleaned or replaced according to the instructions; the performance, structure and validity period of the filter element must meet its usage requirements.
Post time: Jan-10-2024