The OEM 803089387 Dual-Stage Gear Pump is a genuine XCMG hydraulic power unit engineered specifically for motor grader working, steering, and brake circuits. This heavy-duty pump delivers high-flow and high-pressure output, ensuring precise hydraulic control and maximum uptime for your XCMG GR series grader.
Manufactured to original equipment specifications, the 803089387 dual-stage gear pump features a two-section design: a large-displacement low-pressure stage for high-flow implement functions and a small-displacement high-pressure stage for steering and brake circuits. It withstands working pressures up to 25 MPa and operates reliably from -40°C to +120°C.
Using genuine XCMG 803089387 dual-stage gear pumps eliminates pressure drop, flow starvation, and premature wear. Each unit undergoes 100% flow testing, pressure validation, and dimensional inspection before leaving the factory. Upgrade your grader’s hydraulic reliability with authentic OEM quality.
The 803089387 dual-stage gear pump integrates two independent gear pump units within a single housing, mechanically connected and rotating synchronously. This configuration allows simultaneous or sequential fluid displacement for different hydraulic functions.
Stage one provides high flow for implement functions like blade lift, moldboard side shift, and circle rotation. Stage two delivers lower flow but higher pressure for steering and brake circuits. This smart distribution optimizes engine power utilization and reduces parasitic losses.
The pump body is constructed from high-grade cast iron with precision-ground gear teeth (hardened to 60-64 HRC). This ensures volumetric efficiency > 92% throughout the pump’s service life, outperforming standard gear pumps by 8-10%.
This dual-stage gear pump directly replaces OEM part 803089387 on XCMG GR2153, GR200, GR180, GR3005, and GR3505 graders. It is the original equipment pump for the working hydraulic system on GR215 series machines.
Typical applications include blade lift cylinders, articulation steering, differential lock engagement, brake valve supply, and auxiliary hydraulic circuits for attachments. The pump’s dual-stage architecture provides 52 L/min per stage at 2200 rpm.
For older GR135 and GR165 series, the 803089387 pump offers direct compatibility with existing mounting flanges and drive splines. Cross-reference aftermarket numbers: 803045340, 1121302386, HYD-DP210.
Before installing the 803089387 pump, clean all hydraulic lines and the mounting surface. Lubricate the spline drive shaft with clean hydraulic oil. Align the pump carefully to avoid side loading on the shaft. Tighten mounting bolts to 45-55 Nm in a star pattern.
Fill the pump housing with hydraulic oil before connecting the suction line to prevent dry startup. After installation, run the engine at idle for 30 seconds to allow the pump to self-prime. Check for unusual noise or pressure fluctuations. Inspect all flange connections for leaks after the first heat cycle.
All 803089387 dual-stage gear pumps are manufactured in XCMG’s ISO 9001:2015 and IATF 16949 certified facilities. Each unit undergoes 100% flow testing across the entire pressure range, volumetric efficiency verification, and noise/vibration measurement.
Random samples are subjected to 1 million impulse cycles at 133% rated pressure. The pump’s gear teeth are 100% magnetic particle inspected for micro-cracks. Traceability labels include batch number, flow calibration data, and date of manufacture.
Aftermarket pumps often use low-grade materials and imprecise gear profiles, leading to cavitation, flow ripple, and premature failure. Genuine 803089387 pumps use high-grade cast iron bodies and precision-ground hardened steel gears, validated by finite element analysis and field trials.
Mining and construction operators report that genuine XCMG pumps last 3-4 times longer than aftermarket equivalents, with consistent flow output throughout their service life. Protect your grader’s hydraulic system and minimize downtime with OEM reliability.
The 803089387 dual-stage gear pump is stocked in XCMG regional warehouses across North America, Europe, Asia-Pacific, the Middle East, and Africa. Standard lead time is 5-7 working days. Express freight options are available for critical breakdown situations.
Each pump is individually packed in anti-corrosion paper and heavy-duty foam-lined cartons to prevent damage during transit. Technical datasheets, 3D CAD models, and installation manuals are available upon request. XCMG parts specialists provide remote diagnostic support for complex hydraulic retrofits.
A major road construction contractor in Indonesia replaced failing aftermarket pumps on 14 XCMG GR215 graders with genuine 803089387 units. After 6,000 operating hours, zero pump failures were recorded, reducing hydraulic system-related downtime by 85% annually.
In Canadian mining operations, the 803089387 pump demonstrated exceptional cold-start performance at -35°C, with no cavitation or seal damage. Volumetric efficiency remained above 90% after 8,000 hours, significantly outperforming the original warranty period.
The 803089387 dual-stage gear pump is available with SAE B or SAE C mounting flanges and various spline configurations to match different grader models. Custom flow calibration is available for specialized applications with a 10-day lead time.
For fleet managers, XCMG offers hydraulic pump overhaul kits that include the 803089387 pump, mounting gaskets, seals, and inlet/outlet flange hardware. Kits come with torque specifications and installation checklists. Volume discounts are available for bulk orders of 5 or more units.
To maximize the service life of your 803089387 pump, maintain hydraulic oil cleanliness to ISO 4406 code 18/16/13 or better. Change suction filters every 500 hours and return filters every 1,000 hours. Monitor pump case drain temperature; a sudden increase often indicates internal wear.
Regularly inspect the pump mounting bolts and drive shaft coupling for loosening or misalignment. Annual flow testing can detect efficiency loss before catastrophic failure occurs. Genuine XCMG pumps typically provide 8,000-12,000 hours of reliable service under normal operating conditions.
The 803089387 pump utilizes an optimized involute gear profile with modified tooth tip geometry to reduce pressure ripple and noise. Operating noise levels are typically below 78 dB(A) at rated speed and pressure, significantly quieter than standard gear pumps.
Volumetric efficiency exceeds 92% at rated pressure and speed, thanks to precision-machined housing bores and floating side-plates that provide automatic axial clearance compensation. This design maintains efficiency even as components wear over time.
In summary, OEM number 803089387 represents the gold standard for XCMG motor grader hydraulic power generation. From gear metallurgy to precision assembly, every detail meets the highest heavy-equipment standards. Never risk flow starvation or hydraulic failure. Order the genuine 803089387 dual-stage gear pump today and experience the XCMG quality difference.
With proven reliability in thousands of graders worldwide, the 803089387 pump continues to outperform aftermarket alternatives. Ensure maximum productivity, consistent implement speed, and extended component life. Choose genuine XCMG for your grader’s hydraulic heart. Secure your fleet’s operational efficiency with OEM authenticity.
