2. Technical maintenance. On a regular basis on various parts of the combine cleaning, inspection, fastening, adjustment, lubrication, and add the replacement of parts and components, and other vulnerable operations. ①combines the clean, clear machine-hull, broken stem and other attachments, the lubrication in a timely manner all parts of friction, to clean the outside of the chain, lubricating oil. ② engine checks the state of technology, including oil pressure, oil temperature, water temperature is normal, the sound engine fuel consumption is normal, and so on. ③ Taiwan harvest inspection and adjustment, including the allocation of the Wo round and a high speed, cutting knives and cutting space travel, and stir-long bottom-long gap and speed up the size of whether it meets the requirements. ④ threshing plant inspection. Speed is the main roller should be gravure gap in line with the requirements of the higher speed, smaller gap, but not caused by grain and broken drum plug phenomenon. ⑤ separation devices and cleaning devices check, draft-by-examination should be tightened after the crankshaft rotation flexibility is appropriate, axial roller separation device is mainly to see whether the rotating drum light, flexible and reliable. ⑥ check other items. Are there cracks in welded parts, various types of oil, water is clean enough, whether or not a solid fasteners, rotating parts movement is flexible and reliable control device is flexible, accurate and reliable, particularly hydraulic control agencies, to be used is accurate.