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Second, check the safety protection: the national mandatory standards require that safety qualified agricultural products must have safety protection devices. Protective shields are required for parts such as starting claws, fans, pulleys, power output shafts, exhaust pipes, chain drives and cutter shaft assemblies. Foot pedals should be skid plates, and yellow or red safety warning signs should be affixed where they are easy to hurt. The throttle, the lever, and other places must have obvious operating symbols.
Third, to check the quality of the assembly: Check all parts of the agricultural machinery, parts are not complete, no damage; installation is not very good. Formally qualified product assembly markings are very clear and obvious, such as gear assembly markings, piston top markings, etc. should be well-defined. Check that all tightening screws and nuts are tight and never use wire or nails instead of cotter pins. All rotations, transmissions and operating devices are flexible, with no sticking or loosening. If you choose a rotary cultivator, it depends on whether the cutter shaft is flexible, whether there is obvious axial turbulence, stuck and abnormal sound, and the gear is flexible, no missing parts, no oil leakage. Rotary knife specifications, model is not the same.
Fourth, do a good job test machine inspection: Buy tractors, agricultural vehicles and other must test. See if the engine starts shaking, the sound is not normal, is it easy to turn off, take the black smoke, gear, direction, brake, throttle is not so good; select the manual sprayer (applicator) is best to simply test the sprayer A try, such as adding water to the medicine tank for spraying, to see if the mist sprayed by the sprayer is not a small, uniform, or dripping droplet, and the valves and connecting parts cannot be “run, run, drip, leakâ€.
First, check the appearance of the product: From the front, back, left, right, and in all directions, see if the entire machine has any distortion. Whether there is rust or not, the sheet metal part is not smooth, there is no paint leakage, flow paint, castings have no pores, sand holes, burrs, plastic parts color, wall thickness is not uniform, tires, V-belt and other rubber No aging deformation, there is no leaking, oil spills. There must be a fixed nameplate on the machine tool. See the model on the nameplate is not the same as they need. Some look similar from the outside, the name is also very similar, but do not pay attention to buying back can not be used. Without a nameplate or site, it is basically not a product of a regular production company. Quality is hard to guarantee.