Improper use and operation of rigs mainly include the following aspects

　　①The new engine or the diesel engine that has just replaced the cylinder liner, piston, piston ring and shaft, etc., does not go through sufficient running-in, and directly carries heavy load operation, causing serious wear of the parts, and even "cylinder" piston jamming. accident. ②After the diesel engine is started, it runs at full load without warming up, and the oil pressure and cooling water temperature have not reached the specified requirements, causing an accident. ③After the equipment is parked in winter, the cooling water is not exhausted and the oil and fuel used do not meet the specified requirements. ④ When the main clutch of the drilling rig is not disengaged, reverse or change gears, causing gear damage. ⑤After the diesel engine is started, the main transmission handle and the forward/backward handle of the boring machine are not placed in the specified positions, causing damage to the traveling gearbox.

　　1.2 Poor use and maintenance

　　The untimely adjustment mainly includes the following aspects: ① Failure to add or regularly replace the engine oil on time, causing the engine oil to deteriorate and lose its lubricating performance. ②Clean various filters or replace filter elements on a regular basis. That is, the air filter, the oil filter, and the diesel filter are not cleaned, so that the air, oil and diesel are brought into impurities or the diesel engine cannot work normally due to its blockage. ③Failure to adjust the valve clearance, fuel supply advance angle, single brake, etc., and allow the development and changes to not only affect the normal operation of the equipment, reduce the efficiency, but may also cause damage to the equipment. ④ Assembly and adjustment errors. All matching parts of the diesel engine as well as the brakes, clutches, gearboxes, etc. have strict assembly requirements. If the assembly does not meet the specified requirements or is adjusted incorrectly, malfunctions will occur. ⑤ Poor manufacturing and repair quality. Because the material and processing accuracy of the parts do not meet the original design requirements, they are mixed on the equipment and exposed in the use engineering, causing equipment failure