D290P1Y6R-9N04-AVS Hydraulic Pump For ZE665E-10
1. Product Overview
D290P1Y6R-9N04-AVS is swashplate tandem variable axial piston pump, designed as main hydraulic power assembly for Zoomlion ZE665E-10 large crawler excavator.
Adopting double pump parallel tandem layout, matched with negative flow control regulator. It provides high-pressure hydraulic oil to drive boom, arm, bucket, slewing and travelling hydraulic actuators of excavator. High-quality interchange aftermarket pump assembly can directly replace OEM pump for equipment overhaul and maintenance.
Model Code Explanation
- D290：Series of large excavator variable axial piston pump
- 290：Combined displacement specification for main pump assembly
- P1Y6R：Tandem double pump structure, control valve group configuration code
- 9N04：Dedicated assembly version code matched for Zoomlion ZE665E-10
- AVS：Improved reinforced regulator configuration
- Application: Zoomlion ZE665E-10 Large Crawler Excavator
2. Main Technical Parameters
Item Specification
Pump Type Tandem Variable Displacement Axial Piston Pump
Control Mode Negative flow control
Rated Working Pressure 34.5 MPa
Maximum Peak Pressure 37.5 MPa
Rated Rotating Speed 1900 rpm
Maximum Operating Speed 2100 rpm
Rotation Direction Clockwise (viewed from shaft end)
Applicable Hydraulic Oil ISO VG46 anti-wear hydraulic oil
Operating Temperature -20℃ ~ +92℃
Seal Material NBR; FKM high-temperature sealing kit optional
Approximate Weight 165 kg
Compatible Machine Zoomlion ZE665E-10 Crawler Excavator
3. Working Principle
The engine drives main shaft and cylinder block to rotate synchronously. Reciprocating motion of pistons completes continuous oil suction and high-pressure discharge circulation.
The negative flow regulator automatically adjusts swashplate tilt angle according to feedback signal pressure from main control valve, changes pump displacement and adjusts output flow to match real-time load demand. Optimized power matching reduces overflow loss, lowers fuel consumption and controls hydraulic oil temperature.
The whole hydraulic system realizes composite actions including excavation, lifting, travelling and slewing of large excavator.
4. Core Advantages
1. Specially developed and calibrated for Zoomlion ZE665E-10 large excavator; mounting flange, spline shaft and oil port layout fully consistent with original pump for direct replacement.
2. Precisely machined internal friction pairs, low internal leakage, maintaining high volumetric efficiency under long-time heavy-load mining and earthmoving conditions.
3. Optimized negative flow control system with reinforced AVS regulator, fast response, stable power matching with engine, energy-saving and low heat generation.
4. High-rigidity cast pump housing, strong shock and vibration resistance, suitable for quarry loading, heavy earthwork and high-intensity construction conditions.
5. Stable flow output, small flow pulsation, smooth compound operation and comfortable operation feeling.
6. Mature aftermarket replacement assembly with shorter delivery lead time compared with original genuine hydraulic pump.
5. Application Range
Main hydraulic main pump for Zoomlion large crawler excavator:
Zoomlion ZE665E-10
Suitable for quarry mining, heavy earthmoving, large infrastructure, stockyard loading and other heavy-duty working scenarios.
6. Common Faults & Replacement Suggestion
Typical failures: Insufficient digging force, slow composite movements, high hydraulic oil temperature, abnormal knocking noise, shaft seal oil leakage.
Thoroughly flush all hydraulic pipelines and replace all hydraulic filter elements before installation. Strictly guarantee hydraulic oil cleanliness to prevent impurities scratching cylinder block, piston shoes and valve plate. Replace complete pump assembly if serious internal abrasion occurs.
