The market Hydraulic Pumps are divided into original brand new,regular remanufactured,ordinary refurbished,and low-quality high imitation parts,with a huge price difference.Poor quality refurbished pumps can work in the early stages of installation,but within a few hundred hours,they may experience insufficient pressure,vehicle holding,and high temperatures,causing significant losses on the construction site.Master the key points of identification and avoid procurement traps.

　　Firstly,let's take a look at the casting process of the pump body.The genuine shell is cast flat,without pores,sand holes or cracks.The part number and serial number engraved on the shell are clear and firm,and the font is not easy to scrape off.It comes with a formal packaging certificate.The refurbished pump casing has been polished and repainted,and upon closer inspection,there are old scratches,bumps,and polishing marks on the casing.The serial number is for later printing.

　　Check the drive shaft spline.The genuine spline has a regular Tooth shape and high hardness.Poor quality parts have poor material and are prone to key wear and tear.Manually rotate the drive shaft,the genuine product has uniform and smooth rotation resistance,without any carelessness or metal scratching or jamming;The refurbished pump with internal wear has jamming and abnormal noise during rotation.

　　Pay close attention to the regulator.The regulator valve body is not damaged or bumped,and there are no signs of damage from repeated tightening of the adjustment screws.The threads of the oil inlet,outlet,and drain ports are intact without any broken teeth,and the flange sealing surface is flat and not deformed.

　　Distinguish between regular remanufacturing and simple refurbishment.Legitimate remanufacturing will replace damaged cylinder bodies,plunger shoes,distribution plates,seals,replace regulator valve cores,and calibrate flow,pressure,and power curves on a hydraulic test bench;Simple refurbishment only cleans the outer shell,replaces the external oil seal,and retains the internal wear parts.The price is extremely low and the failure rate is high.

　　Don't blindly pursue low prices.Priority should be given to original or legitimate remanufacturing of heavy-duty mining equipment.Once the main hydraulic pump fails,the entire machine will be shut down directly,causing damage to valves,motors,and oil cylinders.The comprehensive maintenance cost is much higher than the price difference of accessories.The conditions allow for testing the pressure,flow rate,and oil leakage on the test bench after receiving the goods,in order to avoid the risk of failure from the source.