What are the causes of abnormal noise and poor operation of the hydraulic pump?
I wonder if any attentive friends have heard this sentence: "Is the hydraulic system deflated?" Many friends may feel ambiguous at first hearing this sentence. Not only do they not know the reason, but they also don't know how to deflate the hydraulic system.
Let me first give you a simple introduction to the principle. The reason why the hydraulic system needs to exhaust air is because during the repair or maintenance process, it is inevitable to disassemble and replace parts, and in the process, some air will be mixed into the hydraulic system. , if the mixed air cannot be discharged in time, the machine is likely to run poorly or even make clear abnormal noises, which will have a very bad impact on excavator construction.
Then the question arises. Everyone urgently needs to know when should the exhaust gas of hydraulic components be operated? Does it have to be deflated every time it is disassembled or maintained? If I am not very experienced, can I do it myself? Don't worry, let's take a look together!
First of all, one thing can be determined. In order to avoid damage and ablation of hydraulic components, exhaust gas operation is imperative! If the exhaust is improper or delayed, the damage to the original parts of the hydraulic system will be irreversible. First, the smooth operation will be affected, and the life of the hydraulic parts will be shortened to a certain extent.
Variable volume piston pump deflation steps:
(1) Let’s take a look at the deflation process of the variable capacity piston pump. First, fill the specified amount of hydraulic oil into the tank. Of course, during the entire replacement process, care must be taken to avoid dusty environments and the machine must Park on flat ground.
(2) Then remove the hydraulic oil tank cover.
(3) Properly install the bleed hose at the bleed valve, and then loosen the bleed valve 1/2 turn. (Hose inner diameter: 5 mm) Note: The sealing surface of the air release valve is at the top, so you only need to loosen the air release valve during operation. It is very simple and easy to operate.
(4) Confirm that air is completely discharged from the air bleed valve.
(5) Tighten the air release valve, remove the air release hose, and cover the air release valve. Note: The width across flats of the air release valve is 10 mm; tightening torque: 4.9~6.9 N·m (0.5~0.7 kgf·m)