The corn thresher is a good helper for farmers in the […]
The corn thresher is a good helper for farmers in the autumn harvest, but how to identify the quality of the corn thresher?
The corn thresher on the market is very strange, but how can we find a good one among them? Many farmers do not know much about corn harvesters. What do you think about quality and function?
First, there is no crack, burr. Whether the surface of the joint is flat and smooth, such as burrs on the working surfaces of piston rings and pistons, will cause cylinder pulling; There is a crack at the flywheel, and the corn thresher may crack and hurt people. Check these parts. Lift them in the air, tap them with a metal handle, and listen to the sound to judge whether there are cracks. The sound is crisp and clear is preferred. Parts found to be rusted, moldy or aged should not be purchased.
Second, whether there is deformation, geometry size meets the requirements. Parts are easy to deform if they are stored incorrectly. For shaft parts such as valve push the rod and camshaft, during the inspection, the push rod or camshaft can be laid flat on the counter glass and rotated once to observe the shaft neck of the push rod or camshaft. If there is light leakage, it means it has bent. When purchasing all kinds of molded gaskets, check the geometric size and shape.
Three, the surface protective layer is in good condition. Many corn thresher accessories are protected by protective layers when they leave the factory. If the cylinder liner is protected by paraffin wax, if the wax layer on the parts is lost, the sealing bag is damaged, and the sealing coating is cracked, it should be replaced.
Four, there is no rust, mildew, aging phenomenon. During storage, if the temperature and humidity in the warehouse do not meet the requirements or there are other organic solvents, metal parts will rust, paper pads, cork pads, and other parts will mildew and rot, and rubber parts will age.
Five, whether there is a loose, degumming, desoldering phenomenon. Some fittings are combined by more than two parts. For example, the plunger and the crank arm of the oil pump are combined by press-fitting. There must be no looseness between them. When purchasing paper filter elements and other parts, attention should be paid to whether there is degumming at the joint. When purchasing electrical parts, attention should be paid to the fact that each thread end must not be desoldering.
The above method can identify the quality of corn thresher.