Bubbles in the water tank of the generator set are generally caused by the high-pressure gas in the cylinder flowing into the cooling water channel. The causes of gas channeling and the elimination methods are as follows:

1.缸蓋平面加工不平或變形，造成漏氣，這時應磨削缸蓋平面或更換缸蓋。

1. The cylinder head plane is uneven or deformed, resulting in air leakage. At this time, grind the cylinder head plane or replace the cylinder head.

2.缸套臺肩高度不夠或機體上臺肩孔深度過大，造成缸套裝入機體后，凸出機體平面高度不夠，甚至下陷，燃氣就會從臺肩處竄入水道。因此，裝配前應試裝，檢查凸出量,并保證其在允許范圍內。

2. The height of the cylinder liner shoulder is not enough or the depth of the upper shoulder hole of the engine block is too deep, resulting in insufficient height of the cylinder block protruding from the plane of the engine block or even sinking, and the gas will jump into the water channel from the shoulder. Therefore, trial assembly shall be conducted before assembly to check the projection and ensure that it is within the allowable range.

3.裝配不當，造成缸套臺肩處斷裂而竄氣。按規定方法換新缸套。

3. Improper assembly causes the cylinder liner shoulder to break and blow by. Replace the cylinder liner according to the specified method.

4.未按規定力矩擰緊缸蓋螺母，若力矩太小，缸蓋沒壓緊，高壓燃氣就會竄入水道。應按規定力矩擰緊缸蓋螺母，并定期重新擰緊。

4. The cylinder head nut is not tightened according to the specified torque. If the torque is too small and the cylinder head is not compacted, the high-pressure gas will blow into the water channel. Tighten the cylinder head nuts according to the specified torque and retighten regularly.

5.氣缸墊使用時間過長，被沖壞或燒損，密封性變差，造成漏氣。要更換新氣缸墊。

5. If the cylinder gasket is used for too long, it will be damaged or burned, resulting in poor sealing and air leakage. Replace the cylinder gasket with a new one.

水箱在發電機組中起著相當大的作用，如果水箱使用不當，會對發電機組造成不必要的損壞，所以要注意正確使用和保養，從而保證發電機組的正常使用。

The water tank plays a considerable role in the generator set. If the water tank is not used properly, it will cause unnecessary damage to the generator set. Therefore, attention should be paid to correct use and maintenance to ensure the normal use of the generator set.

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