Before starting the harvester, first fill it with oil and water according to the instructions, check if the battery is fully charged, check if the wiring is in good condition, and then check the tightness of the belt and its chain. If necessary, adjust it according to the instructions; Open the back cover of the threshing part, check whether the threshing gear rod is excessively worn, whether the agitator is blocked by foreign objects, and whether the screen mesh is damaged. If any problems are found, they should be cleaned and repaired in a timely manner; When checking the chassis, first use a jack to support the vehicle body, check the tightness of the tracks, and swing the drive wheels and other wheels by hand to see if the clearance is too large. If necessary, adjust and repair according to the instructions, and lubricate each lubrication part according to the instructions; The clearance between various parts of the harvester should be adjusted according to the instructions, such as the clearance between the moving blade and the fixed blade, the threshing clearance, the clearance between the conveying groove, the clearance between the driving brake, the clearance between the clutch and the bearing, and the clearance between the agitator blade and the cutting table bottom plate. The tension of the chain and belt should also be adjusted according to the requirements; Check the quality and quantity of fuel, engine oil, hydraulic oil, brake fluid, and the quality and quantity of engine oil pan, high-pressure oil pump, and hydraulic oil; Check if the oil pressure gauge, water temperature gauge, and electrical system are working properly