Doosan 150W Wheeled Excavator (9-Spline Drive)

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Product details

Doosan 150W Wheeled Excavator Gear Pump: Technical Overview & User Guide

(Translated for global engineering professionals and equipment operators)

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I. Product Positioning & Compatibility

1. Equipment Integration

• Doosan 150W Wheeled Excavator(15-ton class) typically employs agear pumpfor its primary hydraulic system, driving steering, boom/arm/bucket operations, and auxiliary functions.

• Key Applications:

• Municipal projects (pipeline laying, landscaping)

• Light earthmoving (grading, loading)

• Agricultural infrastructure (irrigation trench digging)

2. Technical Advantages of Gear Pumps

• Simplicity & Cost Efficiency:

• Fewer moving parts than piston pumps, reducing maintenance costs by 30%-40%.

• Ideal for budget-conscious users in low-to-medium duty cycles.

• Contamination Tolerance:

• Compatible with Doosan’s open-loop hydraulic systems (return filter rating ≤25μm), surviving harsh dust/debris environments.

• Speed Flexibility:

• Operates efficiently at engine RPM ranges (1,800–2,200 RPM), supporting rapid road transfers.

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II. Key Technical Specifications (Industry Benchmarks)

(Note: Final parameters require verification from Doosan’s OEM manual.)

【表格】

Parameter Typical Range Doosan 150W Fitment Rationale

Displacement 20–50 mL/rev (tandem pump) Balances flow rate and energy consumption for light-duty tasks.

Rated Pressure 250–280 bar (3,625–4,060 psi) Lower than piston pumps (350+ bar), aligning with system load demands.

Max. Speed 3,000 RPM Exceeds engine RPM, allowing short-term overloads.

Port Connection SAE/ISO flange (direct-drive/coupling) Seamless integration with Doosan’s powertrain interface.

Seal Material NBR (Nitrile rubber) Resists mineral hydraulic oil (ISO VG46), with 5,000+ hours lifespan.

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III. User Selection & Maintenance Guidelines

1. Optimal Selection Criteria

• Tandem Pump Priority:

• Simultaneously powers travel motors and work attachments, reducing hydraulic line complexity and leakage risks.

• Pressure Margin Design:

• Choose pumps rated ≥280 bar to prevent fatigue under frequent heavy lifts.

2. Maintenance Schedule & Troubleshooting

• Routine Care:

• Replace hydraulic filters every 250 hours; inspect coupling elastomers every 500 hours.

• Failure Warning Signs:

• Pressure Fluctuations: Indicate internal leakage (gears worn); replacement cost: $800–$1,200.

• Abnormal Noise: Signals imminent bearing/shaft failure—shut down immediately.

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IV. Competitor Analysis & Alternative Solutions

1. Gear Pump vs. Piston Pump【表格】

Metric Gear Pump (Doosan 150W Fit) Piston Pump (High-Load Scenarios)

Initial Cost Low ($300–$600) High ($1,500–$3,000)

Efficiency 75%–80% (light loads) 90%–95% (full loads)

Lifespan 5,000–8,000 hrs (non-continuous) 10,000+ hrs (with precision filtration)

2. Recommended Alternative Brands

• Budget Option: Parker PGP Series (tandem pump, 28–42 mL/rev, plug-and-play with Doosan’s hydraulic circuit).

• Premium Upgrade: Bosch Rexroth A10V Series (variable displacement piston pump, requires system retrofit).

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch , hydraulic system

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