ALP2A-D-10-FG Marzocchi Gear Pump 7.0cc/rev

Product Overview

The ALP2A-D-10-FG and ALP2A-D-12-FG belong to the Marzocchi ALP2A Series of aluminum external gear pumps. Marzocchi officially classifies the ALP range as aluminum gear pumps and publishes dedicated performance data for the ALP2A-D-10 and ALP2A-D-12 configurations.

The ALP2A is a Group 2 fixed-displacement external gear pump designed for hydraulic systems requiring reliable flow generation with a compact and mechanically simple architecture. The official Marzocchi documentation describes its gear-pump construction around the gear pair, support bushes, body, flange and cover, combining structural simplicity with durability and serviceability.

For the ALP2A-D-10-FG, the corresponding official base configuration ALP2A-D-10 has a geometric displacement of 7.0 cm³/rev. The ALP2A-D-12-FG corresponds to the official ALP2A-D-12 configuration with 8.3 cm³/rev displacement. Both configurations are specified with 250 bar continuous pressure, 270 bar intermittent pressure, 290 bar peak pressure and 4000 rpm maximum speed.

Marzocchi defines these pressure levels as:

• P1: Maximum continuous pressure
• P2: Maximum intermittent pressure
• P3: Peak maximum pressure

These values cannot be treated as equivalent continuous operating limits. The permissible pressure levels depend on operating speed, and Marzocchi specifically warns that prolonged high and intermittent pressure operation can reduce housing fatigue strength.

Our replacement units are developed around OEM installation and performance requirements and undergo 100% simulated operating-condition testing before shipment to support reliable field replacement and hydraulic-system refurbishment.

Technical Specifications

ALP2A-D-10-FG

• Model: ALP2A-D-10-FG
• Brand Reference: Marzocchi
• Series: ALP2A
• Pump Type: External Gear Pump
• Pump Group: Group 2
• Corresponding Official Base Model: ALP2A-D-10
• Geometric Displacement: 7.0 cm³/rev
• Theoretical Flow: 10.0 L/min at 1500 rpm
• Maximum Continuous Pressure P1: 250 bar
• Maximum Intermittent Pressure P2: 270 bar
• Peak Pressure P3: 290 bar
• Maximum Speed: 4000 rpm
• Control Method: Fixed Displacement
• Standard Mounting Flange: 82-2(A), SAE J744c
• Standard Port Configuration: SAE J1926/1 / ISO 11926-1 O-ring threaded ports
• Construction: Aluminum ALP-series gear pump architecture
• Weight: Not specified in the official public technical data reviewed; no unverified value is provided.

ALP2A-D-12-FG

• Model: ALP2A-D-12-FG
• Brand Reference: Marzocchi
• Series: ALP2A
• Pump Type: External Gear Pump
• Pump Group: Group 2
• Corresponding Official Base Model: ALP2A-D-12
• Geometric Displacement: 8.3 cm³/rev
• Theoretical Flow: 11.8 L/min at 1500 rpm
• Maximum Continuous Pressure P1: 250 bar
• Maximum Intermittent Pressure P2: 270 bar
• Peak Pressure P3: 290 bar
• Maximum Speed: 4000 rpm
• Control Method: Fixed Displacement
• Standard Mounting Flange: 82-2(A), SAE J744c
• Standard Port Configuration: SAE J1926/1 / ISO 11926-1 O-ring threaded ports
• Weight: Not specified in the official public technical data reviewed.

Model Identification Note

The Marzocchi public technical documentation reviewed in this verification process provides the engineering data for ALP2A-D-10 and ALP2A-D-12. The complete “-FG” suffix is not explicitly decoded in the accessible official product pages reviewed.

For procurement and replacement, the complete nameplate configuration should therefore be checked, including:

• Full model number
• Rotation direction
• Shaft configuration
• Mounting flange
• Inlet and outlet ports
• Seal configuration

This is essential because true hydraulic interchangeability depends on the complete mechanical and hydraulic configuration, not displacement alone.

Key Technical Advantages

Precision External Gear Architecture

The ALP2A uses a positive-displacement external gear principle to generate stable hydraulic flow. Its mechanically straightforward construction minimizes structural complexity and supports reliable service operation. Marzocchi itself identifies versatility, strength and long useful life as fundamental characteristics of external gear pumps.

Aluminum Group 2 Construction

Marzocchi positions the ALP family as aluminum gear pumps. This architecture is particularly relevant to mobile hydraulic equipment where pump weight, packaging and mechanical strength must be balanced.

Defined P1/P2/P3 Pressure Capability

The ALP2A-D-10 and ALP2A-D-12 configurations provide:

• 250 bar continuous pressure
• 270 bar intermittent pressure
• 290 bar peak pressure

This three-level pressure definition provides engineers with a more useful duty-cycle reference than a single maximum-pressure figure.

High Maximum Speed

Both configurations are officially specified up to 4000 rpm, providing a broad speed range for engine-driven, PTO-driven and high-speed motor-driven hydraulic systems.

Standardized Mounting Interfaces

The ALP2A standard configuration uses an 82-2(A) mounting flange according to SAE J744c, with standard threaded ports manufactured to SAE J1926/1 / ISO 11926-1 requirements for O-ring sealing.

OEM-Oriented Replacement

For replacement applications, displacement matching alone is insufficient. Shaft configuration, mounting flange, rotation, port geometry and sealing details must also correspond.

Our replacement units are therefore produced with an OEM-oriented interchangeability approach and subjected to 100% simulated operating-condition testing before shipment.

Application Areas

Typical applications include:

• Construction machinery
• Compact loaders
• Agricultural machinery
• Tractor auxiliary hydraulic systems
• Material handling equipment
• Forklift hydraulic systems
• Municipal equipment
• Road maintenance machinery
• Hydraulic power units
• Industrial hydraulic power packs
• Machine-tool auxiliary hydraulic systems

Marzocchi’s official product information positions its external gear pumps for both industrial and mobile hydraulic applications.

Expert Maintenance Tips

Verify the Complete Nameplate

Always verify the complete ALP2A-D-10-FG or ALP2A-D-12-FG identification rather than matching the displacement designation alone. Shaft, flange, rotation and port configuration must be checked before replacement.

Avoid Dry Startup

Prime the pump and ensure adequate inlet-side oil supply before initial startup. Inadequate lubrication during startup can accelerate gear, bush and sealing wear.

Maintain Correct Inlet Conditions

Marzocchi specifies an operating inlet pressure range of 0.7–3 bar absolute under standard conditions. Incorrect suction-line sizing, excessive restriction or filter blockage can negatively affect pump inlet conditions.

Use Suitable Hydraulic Fluid

Marzocchi recommends mineral-oil-based hydraulic fluids with anti-wear, anti-foaming, antioxidant, anti-corrosion and lubricating properties. The documentation references DIN 51525, VDMA 24317, and the 11th stage of the FZG test. The recommended kinematic-viscosity range is 10–100 cSt; an allowed range of 6–500 cSt is specified subject to verification, with startup viscosity below 2000 cSt. Standard-model fluid operating temperature is specified as -10°C to +80°C.

Match Pressure to Speed

Do not interpret 290 bar as a continuous pressure rating at 4000 rpm. Marzocchi explicitly defines P1, P2 and P3 according to duty cycle and speed limitations. High intermittent pressure operation can also reduce housing fatigue strength.