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Original Gear pump HP51B678-20-20-10-02GA used for XCMG QY50K Truck crane spare parts
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This HP51B678-20-20-10-02GA Original Gear Pump is a four-stage multi-unit gear pump, the core hydraulic power supply component matched for heavy-duty construction machinery, classified as professional XCMG construction machinery spare parts and general matching XCMG Truck Crane spare parts for equipment maintenance.
Many equipment owners face frequent failures of old gear pumps, including insufficient oil supply, pressure drop, internal leakage and abnormal noise, which directly affect the lifting and walking performance of cranes. As a fully interchange spare part, this HP51B678-20-20-10-02GA gear pump completely retains the original mounting size, spline shaft specification and oil port layout of OEM equipment, no cutting or pipeline modification required, greatly shortening on-site maintenance downtime.
Adopting precision gear grinding technology, this multi-stage gear pump adapts to high-load continuous working scenarios such as truck cranes, loaders and road rollers. Every finished pump undergoes strict pressure and flow testing before delivery, fully meeting the quality standard of original XCMG Truck Crane spare parts and hydraulic system accessories.
| Parameter Item | Specification |
|---|---|
| Complete Model | HP51B678-20-20-10-02GA |
| Product Type | Four-stage combined hydraulic gear pump |
| Displacement Combination | 67cc / 20cc / 20cc / 10cc |
| Rated Working Pressure | 25 MPa |
| Max Peak Pressure | 31.5 MPa |
| Drive Shaft Type | Straight spline shaft (standard XCMG matching size) |
| Sealing Form | NBR high pressure resistant composite seal |
| Main Material | Alloy steel gear + cast aluminum pump housing |
| Applicable System | Open hydraulic system for lifting machinery |
| Approx Net Weight | 68 KG |
Stable multi-flow combined output
Four-stage integrated pump body can supply independent oil flow for lifting, steering and auxiliary actions at the same time, stable pressure output under long-time heavy load, far better than split low-cost generic XCMG Truck Crane spare parts.
Low noise & anti-wear precision gear group
High-precision grinding gears reduce meshing clearance and running noise, effectively lower internal wear, extend the service life of the whole pump in dusty construction sites.
High pressure resistant leak-proof sealing system
Multi-layer composite sealing components are installed at pump end and oil ports, effectively prevent hydraulic oil seepage under high pressure, reduce later oil consumption and maintenance cost.
1:1 OEM original installation compatibility
Pump body mounting holes, spline size, oil port position and overall outline are fully consistent with original parts, plug-and-play installation for matched XCMG truck cranes and engineering machinery XCMG Truck Crane spare parts replacement.
This HP51B678-20-20-10-02GA Original Gear Pump is specially developed for medium and large tonnage XCMG Truck Crane hydraulic power system, providing power for lifting, luffing, slewing and walking mechanisms. It is also a universal standard spare part stored in our full range of XCMG Truck Crane spare parts for multi-model equipment maintenance.
All gear pumps adopt shockproof wooden case packaging to avoid collision damage during long-distance sea and land transportation. We provide 12-month warranty against manufacturing defects, and our professional hydraulic parts team offers one-stop technical guidance for installation, commissioning and daily maintenance. If you need matched hydraulic motors, valves and hydraulic cylinders as complete XCMG machinery spare parts packages, you can contact us for bulk customized supply solutions.