1. Water tank boiling with cold water
In excavator engine overload operation, poor heat dissipation and other conditions will form the situation of water tank boiling. Many repairmen's top response is to add water. However, if cold water is added at this time, the cylinder head and cylinder body will burst, so the engine should be stopped at this time, and then water is added after its natural cooling.
2. Never change oil
Excavator oil plays a very important role in the side of excavator, and many repairmen attach great importance to it. They add it in full compliance with the standard requirements. However, many repairmen have forgotten to check the quality of oil and change the oil.
Long-term only adding oil without replacing it will make many parts of the engine work in a poor smoothness environment, resulting in abrasion far beyond normal state.
Moreover, in the process of diesel engine work, a lot of dirt will also enter the oil side. If the oil is not replaced regularly, it will easily cause accidents such as burning tile, holding axle and so on.
3. Daubing of butter indiscriminately
The main function of excavator butter is smoothness and sealing. So sometimes repairmen put butter on their cylinder gaskets at the edge of the repair process, thinking that this would add to the sealing performance of their diesel engines.
However, this is a big mistake. Because if butter is applied to the cylinder gasket, when the cylinder bolt is tightened, a part of butter will flow to the side of the cylinder. The remaining butter will form a certain gap between the cylinder pad, the cylinder head and the plane of the body after being affected by high temperature, which in turn reduces the original sealing of the cylinder pad.
4. Installation without combination of cylinder liner and piston products
Many repairmen think that new products should be standard parts when repairing. Therefore, in the face of new cylinder liner and piston products, often do not look at the specific scale. This will lead to many times when the cylinder liner and piston products do not match. When the largest cylinder is equipped with the smallest piston, the gap between the two will be too large and the compression will be weak.
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