Repair shops,parts stores,and engineering fleets purchase hydraulic pumps in large quantities,and the market supply is mixed,with many simple refurbished,high imitation,and inferior parts.Batch stepping on the pit can lead to early wear and tear of multiple equipment pumps,inability to hold the vehicle,resulting in a large number of after-sales disputes and losses from construction site shutdowns.Wholesale procurement needs to avoid industry traps.　　Refuse to place bulk orders based solely on excavator tonnage.Different models of the same tonnage have different pump displacements,regulat...

　　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 por...

　　Most hydraulic pumps are damaged prematurely,not because they have reached their design lifespan,but because of hydraulic oil contamination,operating habits,and inadequate maintenance of filter elements.Proper daily maintenance can significantly extend the service life of the main pump and reduce costly repairs.　　**Hydraulic oil cleaning is the first key.Replace the hydraulic oil and complete set of hydraulic filter elements on time according to the equipment manual.Reduce the maintenance cycle appropriately for high dust mining conditions.Hydraulic oil must be replaced immediately if it...

　　The disassembly and assembly of the main hydraulic pump is a major project,and many new pumps are quickly damaged,mostly due to errors in disassembly details.Strictly follow the process to avoid early wear and tear of new parts.　　Turn off the engine and stop the machine before disassembly,wait for the hydraulic oil to cool down sufficiently,release the residual pressure in the system,and disconnect the negative terminal of the battery.Drain the hydraulic oil from the hydraulic oil tank,remove the hydraulic pump inlet pipe,high-pressure outlet pipe,drain pipe,and pilot control pipe,and ma...

　　Hydraulic pump failure is easily confused with insufficient power of the main control valve,pilot pump,and engine.It is necessary to first investigate peripheral faults,measure system pressure,flow rate,and pump oil leakage,and then determine that the pump body is damaged and seize the opportunity for replacement.　　Firstly,the overall movement of the machine is weak and the pressure is insufficient.The engine power is normal,but the excavation is sluggish and the heavy load pressure does not meet the standard;The refrigeration unit is still functioning properly,but the operation deterior...

　　Replacing the hydraulic pump cannot be ordered solely based on the excavator's tonnage.Different models of the same tonnage have different pump displacements,regulator models,power curves,drive splines,oil port positions,installation flanges,and servo control methods.They have similar appearances and cannot be directly interchanged.Incorrect selection may result in car holding,weak movement,incorrect flow,and installation interference.Prioritize checking the OE part number before comparing the multi-dimensional key parameters of the actual product.　　Firstly,confirm the overall model...

　　The main hydraulic pump,commonly known as the large pump,is the power heart of the entire hydraulic system of excavators.The vast majority of them are variable displacement piston pumps,and some small excavators use gear pumps.The engine power is transmitted to the hydraulic pump,which converts mechanical energy into high-pressure hydraulic oil,providing high-pressure oil for the main control valve,various oil cylinders,walking motor,rotary motor,and fan motor.All the power for the entire machine comes from the main hydraulic pump.　　Mainstream medium and large excavators often use dual p...