JCB Hydraulic Gear Pump | 20/925337 20/925472 20/925592 | JCB 214 215 216 Backhoe

The JCB Series high-pressure gear pumps from Chengyuan Hydraulic are high-performance power units specifically engineered for JCB 214, 215, 216 backhoe loaders. These pumps strictly adhere to the original hydraulic logic of the machine, typically serving as the main work pump or steering pump. For critical part numbers like 20/925337 and 20/925592, we utilize premium wear-resistant materials. Every pump undergoes 100% full-load condition testing to ensure flow stability under the transient impacts of digging and loading, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Compatible Machines: JCB 214, 215, 216, 3CX, 4CX, etc.

• OEM Part Numbers: 20/925337, 20/925472, 20/925592, 20/925357

• Rated Operating Pressure: 240 bar (24 MPa)

• Peak Pressure: 280 bar (28 MPa)

• Pump Configuration: Double Gear Pump (Triple options available)

• Body Material: High-strength extruded aluminum body / Reinforced ductile iron covers

• Shaft Specification: SAE Spline Shaft

• Mounting Standard: SAE 2-bolt flange

• Rated Speed Range: 500 – 2500 rpm

Key Technical Advantages:

• Floating Side-Plate Compensation: Features advanced axial clearance compensation where side plates automatically adjust against the gear faces via hydraulic pressure. This maintains over 90% volumetric efficiency even during high-temperature operations, preventing sluggish machine movements.

• Reinforced Heavy-Duty Construction: To withstand the heavy loads and pressure spikes common in JCB machinery, our pumps feature a thickened wall design and high-strength cast iron covers. This combination significantly boosts fatigue resistance above 250 bar.

• Optimized Gear Geometry: Precision honing of the gear teeth reduces hydraulic pulsation and operational noise. This improves the operator’s environment and extends the life of downstream control valves and hoses by minimizing system vibration.

• High-Load DU Bearings: Equipped with premium composite wear-resistant bearings, providing exceptional load capacity and heat dissipation. This prevents shaft seizure even in harsh construction environments where oil cleanliness may be suboptimal.

Application Areas:

• Excavation: Powering the boom, arm, and bucket hydraulic circuits.

• Loading: Driving the lift and tilt functions of the front loader bucket.

• Steering Systems: Providing stable auxiliary power for steering circuits in multi-stage pump configurations.

Expert Maintenance Tips:

• Inlet Sealing Verification: JCB pumps handle high flow rates; even minor air leaks in the suction line can cause cavitation. Always replace the inlet flange seals during installation to prevent air ingress and pump whining.

• System Flushing Protocol: Before installing a new pump, clean the hydraulic tank and replace all return filters. If the previous pump failed due to internal debris, the entire circuit must be flushed to prevent metal particles from scoring the new pump’s side plates.

• Initial Priming: Never start the engine immediately after installation. Fill the pump housing with clean hydraulic oil through the inlet port and manually rotate the drive shaft several times to ensure lubrication of the gears and bearings during the first start.