1.液壓油散熱器內部堵塞或散熱器外觀太臟，影響散熱效果（即散熱器不能工作）。

1. The internal blockage or dirty appearance of the hydraulic oil radiator can affect the heat dissipation effect (i.e. the radiator cannot work).

2.液壓油箱缺少液壓油或液壓油太臟，液壓濾芯堵塞，導致溫度過高(如果長時間不保養，液壓油質量會下降，循環性能會變差，產生過多的熱能）。

2. The hydraulic oil tank lacks hydraulic oil or the hydraulic oil is too dirty, the hydraulic filter element is blocked, resulting in high temperature (if not maintained for a long time, the quality of the hydraulic oil will decrease, the circulation performance will deteriorate, and excessive heat energy will be generated).

3、液壓系統中液壓油泄漏過多，導致液壓油泄漏過多，各閥芯液壓件磨損間隙過大，產生大量熱量導致溫度過高；

3. Excessive hydraulic oil leakage in the hydraulic system leads to excessive hydraulic oil leakage, and the wear clearance of hydraulic components in each valve core is too large, generating a large amount of heat and causing excessive temperature;

4.回油單向閥損壞（彈簧損壞或閥卡死），導致回油無阻力或未通過散熱器直接回油；

4. The return check valve is damaged (spring damaged or valve stuck), resulting in no resistance to return oil or direct return oil without passing through the radiator;

5.由于電路系統故障、傳感器或電路問題導致的誤報；

5. False alarms caused by circuit system failures, sensor or circuit issues;

6.液壓泵內部泄漏過多，工作裝置動作緩慢，導致溫度過高；

6. Excessive internal leakage in the hydraulic pump, slow operation of the working device, resulting in excessive temperature;

7.發動機功率不足與液壓泵不匹配，液壓泵供油不足增加液壓系統負荷，增加工作裝置阻力，形成高溫；

7. Insufficient engine power does not match the hydraulic pump, and insufficient oil supply from the hydraulic pump increases the load on the hydraulic system, increases the resistance of the working device, and forms high temperatures;

8.對于大型小型挖掘機，液壓系統具有單獨的液壓風扇馬達、液壓風扇泵和液壓風扇電磁閥。這三個部件的損壞將導致液壓溫度過高。

For large and small excavators, the hydraulic system has separate hydraulic fan motors, hydraulic fan pumps, and hydraulic fan solenoid valves. The damage to these three components will cause the hydraulic temperature to be too high.

小型挖掘機的類型分類

Classification of Types of Small Excavators

1.根據驅動方式，有內燃機驅動小型挖掘機和電動小型挖掘機。電動小型挖掘機主要用于高原缺氧、地下礦山等易燃易爆場所。

1. According to the driving method, there are internal combustion engine driven small excavators and electric small excavators. Electric small excavators are mainly used in flammable and explosive places such as high-altitude hypoxia and underground mines.

2.小型挖掘機按行走方式分為履帶式小型挖掘機和輪式小型挖掘機。

2. Small excavators are divided into tracked small excavators and wheeled small excavators according to their walking mode.

3.小型挖掘機按傳動方式分為液壓小型挖掘機和機械小型挖掘機。機械小型挖掘機主要用于一些大型礦山。

3. Small excavators are divided into hydraulic small excavators and mechanical small excavators according to their transmission methods. Mechanical small excavators are mainly used in some large mines.

4.小型挖掘機按用途可分為通用小型挖掘機、礦用小型挖掘機、船用小型挖掘機、專用小型挖掘機等不同類別。

4. Small excavators can be divided into different categories according to their purpose, such as general small excavators, mining small excavators, marine small excavators, and specialized small excavators.

5.小型挖掘機按鏟斗分為前鏟小型挖掘機和反鏟小型挖掘機。

5. Small excavators are divided into front shovel small excavators and backhoe small excavators according to their buckets.