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Quality CAT E330D2 Hydraulic Pump Assembly   Cat Excavator Hydraulic Pump factory
Quality CAT E330D2 Hydraulic Pump Assembly   Cat Excavator Hydraulic Pump factory
Quality CAT E330D2 Hydraulic Pump Assembly   Cat Excavator Hydraulic Pump factory
Quality CAT E330D2 Hydraulic Pump Assembly   Cat Excavator Hydraulic Pump factory
Quality CAT E330D2 Hydraulic Pump Assembly   Cat Excavator Hydraulic Pump factory
Quality CAT E330D2 Hydraulic Pump Assembly   Cat Excavator Hydraulic Pump factory
>

CAT E330D2 Hydraulic Pump Assembly Cat Excavator Hydraulic Pump

Brand Name: MSGB
Model Number: E330D2
Place of Origin: China
Minimum Order Quantity: 1
Price: Negotiable
Supply Ability: 1000pcs/month

Product Details


Availability: Rich Stock Certifiion: OEM
Application: Excavators Material: High-strength Steel / Cast Iron
Oem: Avaliable Function: For Excavator
Certifitqion: CE, ISO 9001 Nc No: NC-HP116
Quality: 100% Tested Package: Netural Package Carton Box
Stock: In Stock Sealing Type: Mechanical Seal / O-ring
Highlight

CAT E330D2 hydraulic pump assembly

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Excavator hydraulic pump with warranty

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Cat excavator hydraulic pump replacement

Product Description

Our premium CAT E330D2 hydraulic pump assembly is a genuine-spec E330D2 excavator main hydraulic pump and high-performance CAT 330D2 piston hydraulic pump. As a reliable E330D2 replacement hydraulic pump, essential excavator hydraulic system spare part, precision-built OEM spec E330D2 hydraulic pump and robust heavy-duty excavator hydraulic pump, this unit is engineered as a direct drop-in replacement for CAT E330D2 series excavators, restoring full hydraulic power and system efficiency for heavy-duty construction and mining operations. It adopts a dual axial piston variable structure with electro-hydraulic proportional control, delivering stable high-pressure output and precise flow regulation to match the engine power perfectly. Manufactured with high-strength alloy steel and precision-machined core components, it features excellent wear resistance, high volumetric efficiency and low noise. This OEM spec E330D2 hydraulic pump follows original factory dimensions and port positions 1:1, enabling direct bolt-on installation without modification. Replacing a worn or failed CAT 330D2 piston hydraulic pump effectively resolves issues like slow movement, weak digging force, pressure drop and hydraulic system overheating. Every unit undergoes 100% full-load pressure testing and performance calibration before delivery to ensure long-term reliability and low maintenance costs.

Technical Specifications
Item English
Product Name CAT E330D2 Hydraulic Pump Assembly
Compatible Model CAT E330D2 Excavator
Pump Type Dual Axial Piston Variable Pump
OEM Part No. 397-3982, 295-9675
Rated Flow 2*280 L/min
Rated Working Pressure 35 MPa
Drive Mode Engine Direct Drive
Mounting Type Direct Bolt-On
Core Material High-strength Alloy Steel + Copper Alloy
Certification CE / ISO 9001:2015
Control Mode Electro-hydraulic Proportional Control
Product Technology
  • Axial Piston Variable Technology: Swash plate type axial piston structure, variable displacement design. Adjusts flow output automatically according to load demand, improving fuel efficiency by 15% compared with fixed displacement pumps.
  • Electro-hydraulic Proportional Control: Integrated proportional valve and pressure sensor, real-time adjustment of swash plate angle to match working conditions, achieving optimal power matching between engine and hydraulic system.
  • Precision Port Plate Technology: High-precision copper alloy port plate with mirror finish, achieving perfect fit with cylinder block, minimizing internal leakage and ensuring stable pressure output.
  • Surface Hardening Technology: Core components like cylinder block, piston and valve plate adopt carburizing and nitriding treatment, surface hardness reaches HRC58-62, greatly improving wear resistance and service life.
Working Principle

The E330D2 excavator main hydraulic pump converts mechanical energy from the engine into hydraulic energy to power the entire excavator hydraulic system:

  1. The engine drives the pump main shaft, which rotates the cylinder block together.
  2. Pistons inside the cylinder block reciprocate along the inclined swash plate, completing oil suction and discharge cycles.
  3. The electro-hydraulic proportional system adjusts the swash plate angle in real time according to load, changing piston stroke and output flow.
  4. High-pressure hydraulic oil is delivered to the main control valve, driving the boom, arm, bucket, travel and swing mechanisms.
  5. The dual pump structure supplies oil to independent circuits respectively, ensuring coordinated and efficient movement of each actuator.
Competitive Advantages
Advantage Our E330D2 Hydraulic Pump Ordinary Aftermarket Pump
Machining Accuracy CNC precision grinding, ±0.005mm tolerance Rough machining, large tolerance
Core Material High-grade alloy steel + copper alloy Ordinary steel, poor wear resistance
Volumetric Efficiency ≥92%, low internal leakage ≤80%, serious internal leakage
Service Life 8000+ working hours 2000-3000 working hours
Pressure Stability Stable output, no pressure drop Fluctuating pressure, easy to drop
Noise Level Low noise, smooth operation Loud noise, large vibration
Cost Performance 60% of OEM price, OEM quality Low price but high failure rate
Manufacturing Process
  • Raw Material Forging: High-quality alloy steel billet forged by 3000-ton hydraulic press to form pump body and cylinder blanks.
  • Rough Machining: CNC turning and milling to form basic dimensions, reserving machining allowance.
  • Heat Treatment: Carburizing and nitriding treatment for core components to achieve required hardness and toughness.
  • Precision Machining: CNC grinding and boring to achieve high-precision matching dimensions.
  • Mirror Polishing: Polishing of port plate and piston surface to mirror finish, reducing friction and leakage.
  • Precision Assembly: Clean room assembly of pistons, swash plate, valve plate and sealing components.
  • Performance Testing: 100% full-load pressure test, flow calibration and leakage detection on professional test bench.
  • Surface Treatment: Anti-rust painting and surface protection treatment.
FAQ

Q1: Which excavator models does this hydraulic pump fit?

A1: This CAT E330D2 hydraulic pump assembly is exclusively designed for CAT E330D2 series excavators. It is a genuine-spec E330D2 excavator main hydraulic pump, high-performance CAT 330D2 piston hydraulic pump, reliable E330D2 replacement hydraulic pump, essential excavator hydraulic system spare part, precision OEM spec E330D2 hydraulic pump and robust heavy-duty excavator hydraulic pump.

Q2: Is this pump an exact OEM replacement? Does it need modification?

A2: Yes. This OEM spec E330D2 hydraulic pump is manufactured 1:1 to original factory dimensions, port positions and mounting holes. It is a direct bolt-on replacement, no modification or adjustment needed, perfectly matching the original hydraulic system.

Q3: What are common symptoms of a failed hydraulic pump?

A3: Common symptoms include: slow boom/arm/bucket movement, weak digging force, hydraulic pressure drop, abnormal pump noise, hydraulic oil overheating, and increased fuel consumption. Replacing with our E330D2 replacement hydraulic pump can fully restore normal performance.

Q4: Is professional installation required? Do you provide guidance?

A4: Yes, professional hydraulic technician installation is recommended to ensure correct piping connection, exhaust and commissioning. We provide detailed installation manuals, video guidance and 24/7 online technical support.

Q5: What is your warranty policy?

A5: We offer a 12-month warranty against manufacturing defects. If the pump fails due to material or workmanship issues within the warranty period, we provide free replacement parts or full unit exchange. This warranty does not cover damage from improper installation, contaminated oil or overloading.

Product Highlights

CAT E330D2 Hydraulic Pump Assembly: Direct bolt-on replacement with dual axial piston variable technology, electro-hydraulic proportional control, and precision machining. Made from high-strength alloy steel with CE/ISO 9001 certification. Restores full hydraulic power, resolves slow movement and pressure drop issues. 100% tested for reliability.

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