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GHPA2-D-6 Marzocchi Gear Pump 4.5 cm³ High Pressure

Model Number

GHP1-D-4-CO/CO, GHPP1-D-5, GHPA2-D-6+GHPP2-D-6

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Product Description

Product Overview:

The GHPA2-D-6+GHPP2-D-6, GHPP1-D-5 and GHP1-D-4-CO/CO belong to the Marzocchi GHP/GHPA/GHPP series of high-pressure external gear pumps. Fixed-displacement design featuring aluminum housing with steel covers, engineered for high-pressure mobile and industrial hydraulic systems. Compact construction, low noise and high volumetric efficiency. Fully interchangeable with original Marzocchi mounting dimensions, shaft ends, flanges and ports – true drop-in replacement. Every unit undergoes 100% simulated operating-condition testing to guarantee reliable output under rated pressure and speed. Ideal for OEMs and aftermarket applications demanding interchangeability, high-pressure performance and consistency.

Technical Specifications 

  • Models: GHPA2-D-6+GHPP2-D-6, GHPP1-D-5, GHP1-D-4-CO/CO (GHP / GHPA / GHPP series)
  • Brand: Marzocchi
  • Type: High-pressure external gear pump (fixed displacement, single or modular multiple)
  • Displacement: GHPA2-D-6 / GHPP2-D-6 = 4.5 cm³/rev; GHP1-D-4 = 2.8 cm³/rev; GHPP1-D-5 = 3.5 cm³/rev
  • Continuous pressure: GHPA2-D-6 = 280 bar; GHP1-D-4 = 270 bar
  • Intermittent pressure: GHPA2-D-6 = 295 bar; GHP1-D-4 = 290 bar
  • Peak pressure: GHPA2-D-6 = 310 bar; GHP1-D-4 = 310 bar
  • Maximum speed: GHPA2-D-6 = 4000 rpm; GHP1-D-4 = 5000 rpm
  • Minimum speed: approx. 500–800 rpm
  • Control: Fixed displacement
  • Direction of rotation: Clockwise (D)
  • Drive shaft: European tapered 1:8
  • Mounting flange: European standard flange
  • Port connections: Flanged or threaded (CO/CO etc.)
  • Housing material: High-strength aluminum (steel covers)
  • Weight: Depends on configuration (single pump approx. 3–4 kg)

Key Technical Advantages:

  1. High-pressure reinforced design: Steel covers and precision machining enable continuous pressure up to 280 bar and peak 310 bar, suitable for demanding high-pressure applications.
  2. Precision gear machining and pressure-compensated gap sealing: Low internal leakage and reduced heat generation maintain high volumetric efficiency under high-pressure conditions.
  3. Full interchangeability: Mounting dimensions, shaft ends, flanges and ports match original Marzocchi exactly – true drop-in replacement without system modifications.
  4. Low noise and modular design: Optimized tooth profile reduces pressure pulsation and noise; supports single and modular multiple-pump configurations for high flexibility.
  5. 100% simulated-condition testing: Every unit is tested under actual working pressure, speed and load before shipment, ensuring consistent performance and reliability.

Application Areas:

Construction machinery (auxiliary circuits on excavators and loaders), agricultural equipment, forklifts, port machinery, industrial hydraulic power units, mobile cranes and any high-pressure fixed-displacement hydraulic systems. Particularly suited for space-constrained, high-pressure applications with strict interchangeability requirements in both OEM and aftermarket use.

Expert Maintenance Tips:

Install strictly according to original rotation direction and flange alignment to avoid additional radial or axial loads. Bleed the system thoroughly and verify suction-line sealing before first operation to prevent cavitation. Use mineral-based hydraulic oil meeting ISO/DIN standards (recommended operating viscosity 12–100 mm²/s) and maintain cleanliness class ISO 4406 19/17/14 or better. Monitor shaft-seal and housing temperatures regularly and stay within the allowed ambient temperature range. For long-term storage, seal all ports and fill with preservative oil. When replacing, always select the identical model or a fully tested interchangeable unit to maintain system matching and service life.

 

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ALM2-R-9-E1，
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ALP2BK2-D-10，
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ALP2BK2-D-20，
ALP2BK2-D-22，
ALP2BK2-D-25，
ALP2BK2-D-30，
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Company Profile

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Frequently Asked Questions

1.Hydraulic pump
2.Hydraulic valve
3.Hydraulic motor
4.Hydraulic cylinder
5.Hydraulic parts

MOQ: 1pcs— we support sample and small quantity orders.
  • Adhere to quality first.
  • Support customization, ODM & OEM service.
  • 1-year warranty and complete after-sales support.
  • Safe and fast shipping worldwide.
  • 24-hour online service for your inquiries. 
 
Yes, we are a manufacturer with our own factory.
Common models are in stock, and orders are usually shipped within 1–3 days.
We accept T/T, L/C, PayPal, VISA, Western Union, Apple Pay, Google Pay, Afterpay (Clearpay), Klarna, and Trade Assurance.
 
For full orders: 30% deposit, balance before shipment.
For small/sample orders: full payment in advance.
We offer flexible shipping options: DHL, UPS, FedEx, TNT, EMS, as well as air or sea freight.
 
All deliveries ensure door-to-door fast and safe service.
 
All products are tested before shipment to ensure perfect working condition.
 
We offer a 12-month warranty — if a product fails due to quality issues, we provide free spare parts or repair support.
 
If you encounter any problem during use, please contact your sales manager or our support team at any time.
 
We will respond quickly and help solve the issue efficiently.
  • Hydraulic systems
  • Agricultural machinery
  • Construction machinery
  • Automobile industry
  • Local distributors and maintenance centers 
Yes. We offer competitive wholesale prices and try our best to give benefits to long-term partners.
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