840220120/840220140 Plunger Pump For Komatsu wheel loader

Short Description:

840220098 variable axial plunger pump is aftermarket replacement hydraulic spare part for heavy construction machinery. It supplies high-pressure hydraulic oil for boom lifting, bucket tilt and steering circuits.

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Product Detail

Product Tags

description

product parameters

Part No：840220120（Upgraded interchangeable 840220140）
Product Type：Variable Displacement Axial Piston Pump
Applicable Equipment：Komatsu Large Wheel Loader
Control Mode：Load Sensing Swash Plate Control
Nominal Working Pressure：30 MPa (300 bar)
Rated Rotation Speed：2200 rpm
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +115℃
Main Material：Cast iron housing, high-strength alloy steel internal parts, FKM fluorine rubber seal
Surface Treatment：Precision grinding, surface hardening, stress relief annealing, anti-rust coating
Interchangeability：1:1 OEM interchangeable, direct bolt-on installation
Product Condition：Brand new aftermarket part, 100% hydraulic bench tested
Packaging：Independent anti-rust packaging + export wooden case
Storage Environment：Dry indoor storage, moisture-proof, impact-proof, anti-corrosive gas

advantage

- Upgraded load-sensing control for heavy rock loading and stacking operation
Optimized load sensing curve delivers rapid flow response when bucket cuts into heavy rock piles, maintaining stable breakout torque under continuous high-resistance digging.
- Reinforced thick cast shell improves fatigue resistance under frequent shock load
Thickened pump housing enhances structural rigidity, effectively absorbing cyclic pressure spikes generated by repeated rock digging and full bucket loading.
- Balanced multi-circuit flow distribution for smooth combined movements
Reasonable flow allocation allows boom lifting, bucket curling and steering to operate simultaneously without obvious speed drop, greatly improving loading cycle efficiency.
- Optimized friction pair with anti-wear coating for long-shift mine operation
Surface coating treatment on internal friction pair reduces wear rate under long-hour continuous mining operation, extending service life under heavy abrasive working environment.
- Excellent low internal leakage maintains stable pressure during static holding
Low volumetric leakage prevents boom sinking when holding partial load, reducing redundant power consumption and system heat generation during standby.

FAQ

Q1: Which machine does 840220120 / 840220140 plunger pump fit?
A1: This hydraulic plunger pump fits Komatsu large wheel loader. Confirm machine serial number before purchase.

Q2: What hydraulic functions does this pump support?
A2: It provides high-pressure hydraulic oil for boom lifting, bucket tilt and steering system, used for bulk rock and aggregate excavation, loading and stockpiling in quarries and open-pit mines.

Q3: What are typical failure symptoms of worn pump?
A3: Typical symptoms: insufficient breakout force in hard rock, obvious speed drop during compound actions, pressure decay under sustained heavy load, excessive temperature rise during continuous stone loading, abnormal pump noise under high pressure, shaft seal oil leakage.

Q4: What inspections should be done before installing new pump?
A4: Inspect boom cylinders, bucket cylinder, main control valve and filter elements. Fully flush hydraulic tank and pipelines to remove metal debris. Replace degraded hydraulic oil before assembly.

Q5: What hydraulic oil should be used for this pump?
A5: Use ISO VG46 anti-wear hydraulic oil. Working temperature -20℃~115℃. Do not mix different oil brands, avoid long continuous running under peak pressure.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.