840220102 Plunger Pump For construction machinery

840220102 Plunger Pump For construction machinery Featured Image
  • 840220102 Plunger Pump For construction machinery

Short Description:

136-8869 hydraulic axial piston vibratory motor is aftermarket replacement spare part for CAT CS-531 vibratory compactor, compatible with CS-531C, CS-533C, CS-533D, CS-533E and CP-533E with 3116 engine.

Product Detail

Product Tags

description

840220102 axial variable piston pump serves as main hydraulic power unit for heavy construction machinery, driven by engine. It converts mechanical power into adjustable high-pressure hydraulic energy for boom, bucket and steering hydraulic systems. Built-in load sensing control valve dynamically changes pump displacement. During heavy bucket loading and lifting, pump increases flow to maintain stable working speed; under light load or traveling status, it reduces displacement to save fuel and lower heat accumulation.
Internal plungers, cylinder block, valve plate and slipper assemblies are made of high-strength alloy steel with precision grinding and surface hardening treatment. Cast iron pump housing adopts stress relief annealing to eliminate casting residual stress, resisting vibration and solid particle contamination on quarry and mine sites.High-performance FKM fluorine rubber sealing assembly delivers reliable high temperature resistance and anti-aging property, reducing internal volumetric leakage and external oil seepage.

product parameters

Part No：840220102
Product Type：Variable Displacement Axial Piston Pump
Applicable Equipment：Heavy construction machinery (wheel loader / mining equipment)
Control Mode：Load Sensing Swash Plate Control
Displacement：70 cc/rev
Nominal Working Pressure：30 MPa (300 bar)
Max Instantaneous Peak Pressure：35 MPa (350 bar)
Rated Rotation Speed：2200 rpm
Max Allowable Rotation Speed：2500 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
Storage Environment：Dry indoor storage, moisture-proof, impact-proof, anti-corrosive gas

advantage

- Load sensing response optimized for cyclic heavy loading and material stacking
Load sensing curve is tuned for repeated loading cycles. It quickly boosts flow when lifting full bucket, maintaining stable lifting speed under heavy rock and aggregate loads.
- Reinforced thick cast housing withstands cyclic pressure shock in quarry operations
Thickened pump housing improves structural rigidity, resisting pressure fluctuation and vibration shock generated by frequent heavy bucket digging and lifting.
- Multi-circuit flow distribution supports compound action of boom and bucket
Balanced oil supply enables boom lifting and bucket rolling to work simultaneously, shortening each loading cycle and improving site operation efficiency.
- Upgraded wear-resistant friction pair for long continuous shift operation
Optimized internal friction pair improves wear resistance under long-hour cyclic heavy duty, extending service life under continuous day-and-night site work.
- Stable pressure holding performance prevents boom sinking under partial load
Reliable pressure retention keeps boom steady at intermediate lifting position, convenient for material spreading and controlled stacking work.

FAQ 

Q1: Which machine does 840220102 plunger pump fit?
A1: This hydraulic plunger pump fits heavy construction machinery including wheel loader and mining equipment. 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 aggregate loading, stockpiling and material transfer in quarries and mines.

Q3: What are typical failure symptoms of worn pump?
A3: Typical symptoms: insufficient lifting force under full bucket load, slow boom lifting speed, boom gradually sinking while holding position, obvious heat rise after continuous 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.

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our warehouse

Pack and ship

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