224-6369 plunger pump For CAT420D backhoe loader

224-6369 plunger pump For CAT420D backhoe loader Featured Image
  • 224-6369 plunger pump For CAT420D backhoe loader

Short Description:

6E-3136 / 0R-7682 / 6E-5072 are interchangeable variable axial plunger pumps, aftermarket replacement spare parts for CAT120H motor grader.

Product Detail

Product Tags

description

224-6369 axial variable piston pump serves as main hydraulic power unit for CAT420D backhoe loader, driven by 3054 engine. It converts mechanical power into adjustable high-pressure hydraulic energy for front loader, rear backhoe and steering hydraulic systems. Built-in load sensing control valve dynamically changes pump displacement. During heavy backhoe trenching or front bucket loading, pump increases flow to maintain working speed; under light load or idle travel, it reduces displacement to save fuel and reduce 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 particle contamination on municipal construction 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：224-6369
Product Type：Variable Displacement Axial Piston Pump
Applicable Equipment：CAT420D Backhoe Loader, compatible with 430D,432D,442D, 3054 engine
Control Mode：Load Sensing Swash Plate Control
Nominal Working Pressure：28 MPa (280 bar)
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-20℃ ~ +110℃
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

- Load sensing logic optimized for backhoe alternating digging and loading tasks
The load sensing response is tuned for two-way working modes. It quickly adjusts flow between rear trenching and front loading, reducing power loss during frequent function switching.
- Compact pump body fits the limited engine compartment of D-series backhoe loader
Space-saving integrated design matches the narrow cabin layout of CAT D-series backhoe, easy removal and replacement without major pipeline modification.
- Reinforced internal friction pair for cyclic impact from soil excavation and material loading
Upgraded friction pair structure improves fatigue resistance, coping with repeated impact loads during frequent switch between digging and loading operations.
- Balanced multi-circuit flow sharing for partial compound action of front and rear equipment
Reasonable flow distribution enables partial simultaneous movement of front loader and backhoe arm, improving operation efficiency for small municipal job sites.
- Optimized pressure holding performance to restrain arm drift during static positioning
Stable static pressure retention prevents slow sinking of digging arm during trench shaping, helpful for precise depth control in pipeline construction.

FAQ 

Q1: Which machine does 224-6369 plunger pump fit?
A1: This hydraulic plunger pump fits CAT420D backhoe loader, compatible with 430D,432D,442D with 3054 engine. Confirm machine serial number before purchase.

Q2: What hydraulic functions does this pump support?
A2: It provides high-pressure hydraulic oil for front loader boom, front bucket, rear digging arm, rear bucket and steering system, completing trenching, excavation and material loading for municipal projects.

Q3: What are typical failure symptoms of worn pump?
A3: Typical symptoms: insufficient trenching power on hard soil, inconsistent speed between front and rear attachments, arm drifts slowly during static hold, obvious temperature rise during continuous alternating work, pump abnormal noise and shaft seal oil leakage.

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

Q5: Why backhoe still lacks digging power after pump replacement?
A5: The fault may not come from pump. Check relief valve calibration, stuck valve spool, clogged filter, damaged cylinder seals or trapped air inside hydraulic circuit. Air bleeding must be completed after installation.

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.

our warehouse

our warehouse

Pack and ship

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