Among all the common faults of loaders, gearbox problems account for a large proportion. The damage of the gearbox is also the main factor causing the weakness of the loader. Among them, low transmission oil pressure, insufficient transmission system oil or oil leakage, high torque converter oil temperature and poor combination of clutch driving and driven plates will cause insufficient driving force of the loader. Here we list and solve these problems one by one.

裝載機變速箱變速油壓過低，就會造成裝載機驅(qū)動力不足、整機無力、掛不上檔。裝載機變速箱壓力過低的主要原因有以下幾個方面：

If the transmission oil pressure of the loader gearbox is too low, it will cause insufficient driving force of the loader, weakness of the whole machine and inability to gear up. The main reasons for the low pressure of loader gearbox are as follows:

1、減壓閥調(diào)壓彈簧損壞減壓閥的作用是，通過調(diào)壓彈簧將較高的輸入壓力調(diào)節(jié)到規(guī)定的輸出壓力，并保證輸出壓力的平衡。減壓閥的調(diào)壓彈簧一旦損壞，變速箱將無法保證正常的輸出壓力。檢查調(diào)壓彈簧是否損壞，具體方法如下：拆下蓄能器的堵頭螺栓，掏出蓄能器活塞，可以看到調(diào)壓彈簧，檢查彈簧是否失去彈性，彈簧座是否斷裂，閥桿或蓄能活塞是否卡死，造成無法調(diào)壓彈簧。

1. The pressure regulating spring of the pressure reducing valve is damaged. The function of the pressure reducing valve is to adjust the higher input pressure to the specified output pressure through the pressure regulating spring and ensure the balance of the output pressure. Once the pressure regulating spring of the pressure reducing valve is damaged, the transmission will not be able to guarantee the normal output pressure. Check whether the pressure regulating spring is damaged. The specific methods are as follows: remove the plug bolt of the accumulator, take out the accumulator piston, you can see the pressure regulating spring, check whether the spring loses elasticity, whether the spring seat is broken, and whether the valve rod or energy storage piston is stuck, resulting in the failure of the pressure regulating spring.

2、調(diào)壓閥調(diào)整不當(dāng)。調(diào)壓閥通過調(diào)壓閥芯可控制變速箱的輸出壓力大小，輸出壓力過小就會造成變速油壓過低。

2. Improper adjustment of pressure regulating valve. The pressure regulating valve can control the output pressure of the transmission through the pressure regulating valve core. If the output pressure is too small, the transmission oil pressure will be too low.

變速箱損壞是造成裝載機工作無力的主要原因之一，除了合理的操作之外，正確的保養(yǎng)和選購配件也很重要，在這里還建議用戶要正確選用液力傳動油，正確的選用液力傳動油能大大減少裝載機動力系統(tǒng)的故障，另外，選用的液壓油應(yīng)具有良好的低溫流動性、合適的高溫黏度、良好的熱氧化穩(wěn)定性和抗泡性以及具有良好的抗摩和抗腐蝕性能。

The damage of gearbox is one of the main reasons for the inability of loader to work. In addition to reasonable operation, correct maintenance and purchase of accessories are also very important. Here, it is also recommended that users should correctly select hydraulic transmission oil. The correct selection of hydraulic transmission oil can greatly reduce the failure of loader power system. In addition, the selected hydraulic oil should have good low-temperature fluidity Suitable high temperature viscosity, good thermal oxidation stability and foam resistance, as well as good friction and corrosion resistance.

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