20/902900 20/903300 Parker JCB 3CX 4CX Gear Pump 33+29cc

Product Overview

This high-pressure external gear pump is designed for JCB 3CX, 3DX and 4CX backhoe loaders, corresponding to OEM part numbers 20/902900, 20/903300 and compatible 20/925588. Built to Parker Hannifin original specifications for 100% drop-in interchangeability. Features a robust cast-iron housing, precision-ground and heat-treated gears for high volumetric efficiency, low noise and long service life. Every unit undergoes 100% simulated operating-condition testing to verify pressure, flow and sealing performance, delivering a reliable, cost-effective OEM-quality replacement.

Technical Specifications (Bulleted List)

• Model: 20/902900 / 20/903300 (compatible with 20/925588 and related cross numbers)
• Type: Tandem (double) high-pressure external gear pump
• Displacement: Front 33 cc/rev + Rear 29 cc/rev (approx. 62 cc/rev total)
• Rated / Max working pressure: 250–275 bar (model and circuit dependent)
• Rotation: 20/902900 Counter-clockwise (from shaft end); 20/903300 Clockwise
• Shaft: 1″ parallel keyed or 15T SAE B-B splined
• Mounting flange: SAE B 2-hole or 4-hole
• Inlet: Combined 2″ SAE flange
• Outlets: Front 1 1/16″-12 UNF; Rear 7/8″-14 UNF
• Max input shaft torque: approx. 325–460 Nm
• Weight: approx. 26 kg
• OEM equivalent: Parker Hannifin specification, direct JCB interchange

Key Technical Advantages

• Precision manufacturing: High-accuracy ground and carburized gears ensure consistent volumetric efficiency and minimal internal leakage.
• Heavy-duty cast-iron body and durable bearings: Excellent resistance to shock loads and continuous high pressure typical of backhoe loader duty cycles.
• Low-noise, low-pulsation design: Optimized tooth profile and housing flow paths reduce noise and pressure ripple for smoother system operation.
• True drop-in interchangeability with 100% functional testing: Identical mounting, shaft and port dimensions; factory-tested under simulated pressure and speed conditions for plug-and-play reliability.

Application Areas

JCB 3CX, 3CX Sitemaster, 3CX Super, 3DX, 4CX, 4CX Super, 4CXSM, 4CN backhoe loaders main hydraulic systems; selected Loadall telehandler applications; other construction and agricultural machinery requiring reliable high-pressure tandem gear pumps.

Expert Maintenance Tips

Verify exact rotation direction and shaft type match the original machine before installation to prevent reverse-rotation damage. Use JCB-specified hydraulic oil and maintain strict cleanliness with regular filter changes. After start-up, check for leaks and unusual noise; never run dry. Protect ports during storage. When replacing, inspect the coupling and mounting flange for proper alignment to maximize bearing life.