20/925784 JCB Hydraulic Gear Pump 250 Bar

Product Overview

The 20/925784 heavy-duty dual hydraulic gear pump (interchangeable with JCB part numbers 332/G5722, 20/925353, and 20/602100) is precision-engineered for the main implement hydraulic systems of JCB 3CX and 4CX backhoe loaders. Note that for these OEM part numbers, the engineering architecture is an external tandem gear pump (rather than a piston pump). Built strictly to original OEM technical specifications, this high-performance pump guarantees a 100% direct drop-in replacement. Serving as the primary hydraulic power source for excavating, loading, and auxiliary functions, every unit undergoes 100% factory bench testing under simulated full-load conditions to ensure maximum volumetric efficiency, superior temperature stability, and outstanding reliability.

Technical Specifications

• Part Number: 20/925784 (Cross-Reference: 332/G5722, 20/925353, 20/602100)

• Compatible Equipment: JCB 3CX, 4CX Backhoe Loaders

• Pump Type: Tandem / Double External Hydraulic Gear Pump

• Total Nominal Displacement: Approx. 36 + 29 cm³/rev (Front + Rear Pump)

• Rated Operating Pressure: 23.0 MPa (230 bar / 3335 psi)

• Peak Operating Pressure: 25.0 MPa (250 bar / 3625 psi)

• Maximum Speed: 2500 rpm

• Control Type: Fixed Displacement

• Rotation Direction: Counter-Clockwise (CCW, viewed from shaft end)

• Net Weight: Approx. 22 kg

Key Technical Advantages

• 100% Direct Drop-in Interchangeability: Precision-machined mounting flanges, drive shaft splines, and hydraulic port connections strictly match JCB OEM specifications, ensuring plug-and-play installation without pipeline modification.

• High-Strength Body & Hardened Gears: Constructed with a high-tensile body paired with precision-ground, heat-treated alloy steel gear shafts for superior volumetric efficiency and anti-wear performance under high pressure.

• Axial Clearance Compensation: Equipped with heavy-duty DU bushings and floating side plates that provide automatic axial clearance compensation, reducing internal fluid bypass and extending operating life.

• Low Noise & Reduced Ripple: Advanced gear tooth profile geometry minimizes flow pulsation and operational vibration, delivering smooth power transmission and quiet running conditions.

Application Areas

• Construction & Municipal Machinery: Main hydraulic power source for implement functions (front loader, backhoe boom, and auxiliary circuits) on JCB 3CX and 4CX backhoe loaders.

• Off-Highway Equipment: Suitable for specialized off-highway loaders and utility machinery using equivalent JCB hydraulic platform architectures.

Expert Maintenance Tips

• Inlet Line Sealing Check: Inspect the suction line connections and O-rings thoroughly before initial startup to ensure zero air ingestion, which prevents cavitation and premature gear damage.

• Fluid Cleanliness Management: Flush the main hydraulic circuit and clean the oil reservoir thoroughly prior to installation, ensuring fluid cleanliness complies with ISO 4406 19/17/14 or cleaner.

• Simultaneous Filter Replacement: Always replace all hydraulic intake and return filters simultaneously during pump installation to prevent pre-existing system debris from entering the new pump unit.