The common faults of the testing machine mainly include the following points: 1. The pointer sensitivity is not good. During unloading, it will stop and sometimes does not return to zero. This situation is very common and the reasons are multi-faceted. For example, there is a lot of dust on the equipment gear rod, causing corrosion, and the pointer's rotating shaft is not clean and rusts. The contact point of the gear lever is loose. Large internal friction or blockage, etc. 2. When loading, it always fails to rise. The main reason is usually that the viscosity of the oil is not good. Generally, medium viscosity oil should be used, and a viscometer can also be used for measurement. If the oil used is incorrect, it is very likely to cause blockage. 3. The fuel level in the oil tank is insufficient. When a certain load is applied, the oil in the oil pipe makes a sound, the oil flow is very little, and there may even be bubbles. This is generally due to the lack of oil inside. Just add oil to the testing machine and it will be fine. In addition to the above, it is often the case that the oil collector of the oil pump becomes loose, the gap between the piston and the cylinder is too large, and there is excessive oil leakage. Damage to the piston sleeve and insufficient elasticity of the spring can all cause malfunctions. There are also frequent faults such as loose belts of the oil pump and corrosion of the oil pump plunger. However, as long as you master the handling methods of these faults, you can handle them yourself. At the same time, regular maintenance work should be done well to avoid affecting the operation of the equipment. The application scope of testing machines is very wide. Besides being used for product inspection, they can also be applied in product development, with high precision, which greatly enhances the quality requirements of products.