Correct purchase of agricultural machinery parts has a coup
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Whether there are cracks, burrs, and whether the surface of the joint is smooth and smooth, such as piston rings and burrs on the working surfaces of the pistons, it will produce pull cylinders; cracks in the flywheel may cause damage and injury. Check these parts, can be lifted, lifted, tapping with a metal cup, listen to the sound to determine if there is a crack, the sound crisp is better.
There is no corrosion, mildew, aging phenomenon. In storage, if the temperature, humidity in the warehouse does not meet the requirements or there are other organic solvents, the metal parts will rust, paper mats, cork pads and other parts of the mold, decay, aging rubber parts. If parts are found to have rust, mildew, or aging, they should not be purchased.
Whether there is deformation, geometric dimensions meet the requirements. If the parts are stored incorrectly, deformation may occur. Such as valve push rod, camshaft and other shaft parts, check the push rod or camshaft flat on the counter glass, turn it once, observe the push rod or camshaft journal, if there is light leakage, indicating that bending. When buying all types of molded liners, check the geometry and shape.
Is there loose, degummed, and soldered off? Some accessories are composed of two or more parts. For example, the plunger and arm of an oil pump are assembled by press-fitting with no loosening between them. When purchasing paper filter elements and other parts, pay attention to whether or not there is degumming at the joints; when purchasing electrical parts, pay attention to the line heads must not have the phenomenon of desoldering.
The surface protection layer is intact. Many agricultural machinery parts are protected by a protective layer at the factory. If the cylinder liner is protected with paraffin, if the wax layer on the part is found to be lost when it is purchased, the sealed bag is damaged, and the sealing coating is cracked, it should be replaced.
Is the rotating part flexible? If the fuel injection pump assembly is selected, the plunger should be able to rotate flexibly in the plunger sleeve when toggling the adjustment arm. The rotor should be free from seizure when the oil pump is running.
Whether the assembly components are missing. Such as clutches, fuel injectors, fuel pump assembly, etc., should pay attention to whether the assembly of various parts is complete, in particular, pay attention to see if the small parts are missing.
Whether the assembly mark is clear. In order to ensure the correct assembly of the machine, assembly marks are engraved on the surface of some parts. Such as the symbol on the single rack and pinch pump, and the marks on the generator, battery lead, etc., whether the specifications, main technical parameters, etc. meet the requirements. If you choose the clutch spring, the difference between the heights of the springs must not exceed 2 mm; when you purchase electrical equipment, pay attention to check whether the voltage and power of the replaced parts are the same.
The specification and certificate are complete. Important agricultural machinery parts should also pay attention to check whether there is a factory name, factory address, registered trademark, date of manufacture, etc. on the package to prevent counterfeit goods and other inferior products.