20/925580 332/F9030 20/925339 JCB Hydraulic Gear Pump 36/29cc 250bar

Product Overview

The 20/925580 (20925580), 332/F9030, and 20/925339 are interchangeable part numbers for the same tandem hydraulic gear pump, serving as the original equipment hydraulic power component for JCB 3CX and 4CX Backhoe Loaders. This pump is also compatible with JCB 215 skid steer loaders, SD40/SD80/PD80, and other construction machinery models.

This product is a double gear pump (tandem pump) configuration, delivering two independent oil sources driven by a single shaft for the machine‘s loader, excavator, steering, and auxiliary hydraulic functions. The front pump section delivers 36 cc/rev, while the rear pump section delivers 29 cc/rev. The front pump operates at a maximum pressure of 250 bar, and the rear pump at 275 bar.

JCB OEM part numbers 20/925580 and 332/F9030 are interchangeable. As an alternative solution manufactured to JCB OEM specifications, this product enables direct form-fit-function interchangeability with original units—no modifications to piping or mounting interfaces required. Our replacement solution strictly adheres to JCB/Parker technical standards and undergoes 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products.

Technical Specifications

Applicable Models (Primary):

• 20/925580 (20925580)

• 332/F9030

• 20/925339

Interchangeable / Related Part Numbers:

• 7029120048

• 4070H

• 7029120025

• 333/G5390, 333/G5393

Product Type:

• Double Hydraulic Gear Pump (Tandem Gear Pump)

Construction Specifications:

• Rotation Direction: Clockwise (viewed from shaft end)

• Drive Shaft: 1-inch diameter, 15-tooth SAE splined shaft, 16/32 pitch

• Mounting Flange: SAE B 2-hole flange

• Inlet Port: Single 2-inch SAE flange inlet

• Front Pump Outlet: 1 1/16″-12 UNF thread

• Rear Pump Outlet: 7/8″-14 UNF thread

• Maximum Input Shaft Torque: 460 Nm

• Total Weight: Approx. 26 kg

Performance Specifications:

• Front Pump Displacement: 36 cc/rev (36 L/min @ 1,000 rpm)

• Rear Pump Displacement: 29 cc/rev (29 L/min @ 1,000 rpm)

• Front Pump Maximum Working Pressure: 250 bar (3,625 psi)

• Rear Pump Maximum Working Pressure: 275 bar (3,988 psi)

• Speed Range: 800 – 3,000 rpm

• Rated Pressure Range: 20 – 25 MPa

• Peak Pressure: 25 – 28 MPa

• Housing Material: High-Strength Cast Iron Housing

• Gear Material: Precision-Machined Alloy Steel Gears

Compatible Models (per multiple supplier sources):

• JCB 3CX, 3CX Super, 3CXS-PC, 3CX 15, 3CX-T

• JCB 4CX, 4CXM, 4CX 444 SUPER, 4CN 444 SUPER, 4CXSM 444, 4CX-PC

• JCB 4C, 4CN-4WS PC

• JCB 215 (Skid Steer Loader)

• JCB SD40, SD80, PD80, PD55, SD70-LSD, S55, PD70-LSD, PD70-MAXTRAC

Key Technical Advantages

1. Tandem Pump Modular Design — One Shaft, Two Circuits, Simplified System Layout
This tandem gear pump delivers two independent oil sources driven by a single shaft for JCB 3CX/4CX backhoe loaders. This design significantly reduces the number of drive interfaces required and simplifies hydraulic piping layout, making it the ideal choice for complex multi-circuit backhoe loader hydraulic systems.

2. High-Strength Cast Iron Housing — Superior Durability
The pump features a high-strength cast iron housing with precision-machined gears, ensuring stable flow output and long service life under the high-load, high-impact conditions typical of construction machinery. The cast iron construction provides excellent rigidity and impact resistance, particularly suited for the demanding operating environments of JCB backhoe loaders.

3. High Pressure Capacity for Heavy-Duty Applications
The front pump delivers a maximum working pressure of 250 bar, while the rear pump delivers 275 bar. With a rated pressure range of 20–25 MPa and peak pressures up to 25–28 MPa, this tandem pump provides exceptional pressure capacity in its class, capable of handling the various heavy-load operating conditions of JCB 3CX/4CX machines.

4. Direct Interchange Design — Easy Installation
20/925580, 332/F9030, and 20/925339 are interchangeable part numbers for the same product, designed to Factory Fit specifications. Mounting interfaces are identical to the original, enabling direct replacement of JCB OEM part numbers. No modifications to piping or mounting interfaces are required, significantly reducing maintenance downtime.

Application Areas

• Backhoe Loaders: JCB 3CX, 3CX Super, 4CX, 4CXM, and other backhoe loader hydraulic working systems

• Skid Steer Loaders: JCB 215 skid steer loader hydraulic systems

• Construction Equipment: JCB SD40, SD80, PD80, and other model hydraulic systems

• Industrial Hydraulic Systems: Hydraulic power units for various construction equipment

Expert Maintenance Tips

1. Pre-Installation Verification

• Hydraulic gear pumps may vary by pump position, shaft type, flange shape, oil port direction, gear specification, rotation direction, and machine configuration.

• Final fitment should be confirmed by the old pump number, mounting flange, shaft structure, oil port layout, rotation direction, and machine information.

• 20/925580, 332/F9030, and 20/925339 are interchangeable part numbers—compare the removed pump with the replacement unit before ordering.

2. Installation Precautions

• This pump is a uni-directional rotation pump (clockwise)—verify that the system‘s required rotation direction matches the pump’s identification marking before installation.

• Ensure coaxial alignment between the pump and drive shaft; flexible couplings are recommended.

• Ensure reliable sealing of inlet and outlet port connections to prevent leakage. Front pump outlet uses 1 1/16″-12 UNF thread; rear pump outlet uses 7/8″-14 UNF thread.

3. Start-Up & Commissioning

• Use jog start method for initial start-up; verify correct rotation direction before continuous operation.

• Allow the pump to run under no-load (low pressure) conditions for 2-3 minutes to purge air and ensure proper lubrication.

• Gradually increase to operating pressure (front pump up to 250 bar, rear pump up to 275 bar) while monitoring noise, temperature, and system pressure for normal operation.

4. Routine Maintenance

• This gear pump itself is maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free pump operation.

• Inspect system fluid cleanliness and condition every 1,000-2,000 operating hours.

• Regularly replace return line filters and suction strainers to prevent contaminant ingress into the pump body.