What causes the blackening of hydraulic oil in small excavators? Today, Bian Xiao will show you a good understanding.
If your excavator often uses a crusher, the blackening of the hydraulic oil is not only because of impurities, but also because of the irregularity of the grease.
When the drill is changed to an excavator, the broken hammer needs to be lifted to press the steel into the piston. Each filling only needs half of the standard grease gun. Because if the steel is not pressed when adding butter, the butter will be placed at the upper limit of the steel tank. When steelmaking, the butter will directly impact the main oil seal and piston of the circuit breaker. The reciprocating movement brings the butter into the cylinder of the circuit breaker, and then the hydraulic oil in the cylinder of the circuit breaker is mixed into the hydraulic system of the excavator, and the hydraulic oil deteriorates and turns black.
The following are various single player actions. Starting from the bottom, first push the bulldozer to make the top and bottom of the bulldozer. When looking at the top or not touching the structure at all, push the shovel down as much as possible to lift the whole machine. When lifting, stay for a few minutes to see if there is an automatic fall and if there is any leakage in the cylinder or valve core;
Try again, move forward about 10 meters at the same time, and then move back about 10 meters at the same time, to see if there is any obvious deviation. If there is a significant deviation, the oil path is uneven and needs to be repaired, and then walk back and forth to see if it is successful. If the engine is at medium speed, it should be able to walk on one side. (Idle speed is not common when walking on one side and is usually not included in the fault range). Try to rotate again. When testing the rotation operation, there should be two kinds of fast operation and slow operation. When the operation is slow, no matter whether the rotation response is too slow or too fast, too slow means that the guide handle has not rotated one-third of the stroke. Too fast means that the handle starts to move slightly, the swing action starts immediately, the response is too fast, and the braking performance must be tested. After the handle stops operating, it should be rotated again. Some brakes have poor performance and may have to stop at 180 degrees. This is a problem. Deal with it, I personally think that the braking range of the second mobile phone is generally less than 45 degrees, which is considered qualified;
Try buckets, sticks and booms. There is no strict standard for speed. Generally touch by hand, available here. The bucket extends and takes the entire stroke for about 3 seconds. The stick extended and closed. The whole journey takes about 4.5 seconds, and the boom will rise or fall to the end, about 5 seconds. If the action is too fast or too slow, most machines will feel it directly. Too fast or too slow is a problem. Too slow affects the efficiency, too fast, it is easy to destroy the machine, if it is repaired, the value will drop.
The hydraulic oil of the ultra-small excavator often has problems, so it must be maintained and observed.