Product Overview
The 333/D3951, 332/G5722, 20/602100, and 20/925732 are core hydraulic power components for JCB 3CX / 3DX / 4CX series backhoe loaders.
333/D3951, 332/G5722, and 20/602100 are based on the Bosch Rexroth A10VO74 axial piston variable pump platform, with a displacement of 74 cc/rev. These models feature swashplate variable piston design with pressure compensator and load sensing control, automatically adjusting displacement output based on system load demand—delivering on-demand oil supply that significantly improves system efficiency and reduces energy consumption.
20/925732 is a Parker triple gear pump featuring a three-section cast iron housing with a displacement configuration of 40 + 33 + 16 cc/rev (total 89 cc/rev), capable of simultaneous oil supply to the loader, excavator, and auxiliary hydraulic systems. This model features counter-clockwise rotation (viewed from shaft end), SAE B 4-bolt flange mounting, and a 1-inch 15-tooth SAE splined shaft.
Engineered as a direct OEM-replacement solution, these models fully comply with JCB / Rexroth / Parker original design standards and mounting interface specifications, offering 100% direct interchangeability with OEM pumps. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.
Model & Part Number Reference:
333/D3951 — Rexroth A10VO74 axial piston variable pump
Cross references: 333/D5108, 20/925353, A10VO74DFLR/31L-VSC41N00
Compatible models: JCB 3CX, 3CX 4×4 ED, 4CX
332/G5722 — Rexroth A10VO74 axial piston variable pump
Cross references: 20/925651, 20/925784, 20/925353
Compatible models: JCB 3CX, 3CX Super, 4CX
20/602100 — Rexroth A10VO74 axial piston variable pump
Cross references: A10VO74DFLR/31L-PSC12N00
Compatible models: JCB 214-4, 214SM, 215S, 3CX, 3CX444 SUPER, 4CX, 4CX444, 4CX444 SUPER, 4CXSM444
20/925732 — Parker triple gear pump
Technical Specifications
333/D3951 / 332/G5722 / 20/602100 (A10VO74 Platform)
Series: Bosch Rexroth A10VO Axial Piston Variable Pump
Displacement: 74 cc/rev
Rated Speed: 2200 rpm
Pilot Pressure: 20 bar
Rated Power: 54 kW
Rotation Direction: Right-hand (clockwise) / Left-hand (counter-clockwise) depending on configuration
Control Type: DFLR (Pressure Compensator + Load Sensing)
Housing Material: Cast iron
Weight: Approx. 23 – 37 kg
Mounting Flange: SAE A / Flange Type A
Compatible Models: JCB 3CX, 3CX Super, 4CX, 214 Series, 215 Series, etc.
20/925732 (Parker Triple Gear Pump)
Model: 20/925732 (JCB Part Number)
Pump Type: Triple Gear Pump
Front Pump Displacement: 36 – 40 cc/rev (40 L/min @ 1000 rpm)
Middle Pump Displacement: 19 – 33 cc/rev (33 L/min @ 1000 rpm)
Rear Pump Displacement: 16 cc/rev (16 L/min @ 1000 rpm)
Total Displacement: Approx. 89 cc/rev
Maximum Working Pressure: 275 bar
Rotation Direction: Counter-Clockwise (viewed from shaft end)
Mounting Flange: SAE B 4-bolt flange
Shaft Type: 1-inch diameter, 15-tooth SAE B-B splined shaft
Housing Material: Cast iron
Weight: Approx. 40 kg
Compatible Models: JCB 3CX, 4CX
Key Technical Advantages
1. Rexroth A10VO Platform – High-Efficiency Variable Control
333/D3951, 332/G5722, and 20/602100 are based on the Bosch Rexroth A10VO74 axial piston variable pump platform. Featuring swashplate variable design with DFLR pressure compensator and load sensing control, these pumps automatically adjust displacement output based on actual system load demand—delivering on-demand oil supply. Compared to fixed-displacement gear pumps, they significantly reduce energy losses and system temperature rise.
2. Triple Pump Design – One Pump, Three Circuits (20/925732)
20/925732 features a Parker triple gear pump configuration with three stages (40 + 33 + 16 cc/rev) driven by a common input shaft, enabling simultaneous oil supply to the loader, excavator, and auxiliary hydraulic systems of the backhoe loader. This design significantly reduces the number of pumps required, saves installation space, and lowers system complexity.
3. High-Strength Cast Iron Housing for Durability
All models feature high-strength cast iron housing construction, offering superior fatigue strength and impact resistance compared to aluminum housings. The excellent damping characteristics of cast iron effectively absorb vibration and shock loads during operation—particularly suitable for backhoe loaders operating in harsh conditions over extended periods.
4. High-Pressure Capability for Heavy-Duty Applications
The A10VO74 series variable pumps (333/D3951, etc.) deliver 54 kW rated power at 2200 rpm; the 20/925732 triple gear pump delivers up to 275 bar maximum working pressure. Both fully meet the high-pressure, high-flow demands of backhoe loader operations including digging, lifting, and loading.
5. 100% Direct Interchangeability
All models are manufactured to JCB / Rexroth / Parker original technical specifications, with flange dimensions, spline shaft specifications, and mounting interfaces identical to OEM pumps. 333/D3951 is cross-compatible with 333/D5108 and 20/925353; 332/G5722 is cross-compatible with 20/925651, 20/925784, and 20/925353—direct drop-in replacement with zero modifications required.
6. 100% Factory Tested
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation—ensuring every unit meets design performance standards.
Application Areas
This series of hydraulic pumps is specifically designed for JCB backhoe loader hydraulic systems and is widely used in the following equipment:
JCB 3CX Backhoe Loaders: 3CX, 3CX Super, 3CX 4×4 ED, 3CX444 SUPER, 3CXSM
JCB 4CX Backhoe Loaders: 4CX, 4CXSM, 4CX-4WS-SM, 4CXSMAPC, 4CXSMEC, 4CXSSMEC
JCB 3DX Backhoe Loaders: 3DX series
JCB 214/215 Series: 214-4, 214SM, 215S
JCB 5CX Backhoe Loaders: 5CX
Expert Maintenance Tips
1. Model Confirmation
333/D3951, 332/G5722, and 20/602100 are all based on the A10VO74 platform but have different part numbers with potentially different control types and rotation configurations. 20/925732 is a Parker triple gear pump with a completely different construction from the variable pumps. Before installation, always verify the complete part number on the original pump nameplate.
2. Rotation Direction Confirmation
A10VO74 Series (333/D3951, 332/G5722, 20/602100): Confirm rotation direction based on specific configuration—some are right-hand (clockwise), some left-hand (counter-clockwise)
20/925732: Counter-Clockwise rotation (viewed from shaft end)
Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to prime and may cause severe damage to internal components within a short period.
3. Installation Precautions
A10VO74 Series (333/D3951, 332/G5722, 20/602100): SAE A type mounting flange, center distance 181 mm, bolt hole diameter 17.5 mm
20/925732: SAE B 4-bolt flange mounting, 1-inch 15-tooth SAE B-B splined shaft
Thoroughly clean the mounting flange and shaft mating surfaces before installation to ensure no debris remains
Use specified torque values for mounting bolts—avoid over-tightening which may cause cast iron housing distortion
4. Variable Pump Control Setup (333/D3951 / 332/G5722 / 20/602100)
These models feature DFLR control (Pressure Compensator + Load Sensing). During system commissioning, correctly set the pressure compensator and load sensing valve set points. Adjustment should be performed by qualified technical personnel following the Rexroth official service manual.
5. First Start-Up and Bleeding
Before first start-up, must fill the pump with hydraulic oil through the inlet port—never start dry
For variable pumps, ensure the housing cavity is filled with oil before start-up to prevent piston and cylinder wear due to insufficient lubrication
After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system
Check for abnormal noise or leakage
6. Fluid and Filtration
Use high-quality anti-wear hydraulic oil compliant with JCB / Rexroth specifications
Maintain system oil cleanliness to ISO 4406 18/15 or better
Axial piston pumps have high cleanliness requirements—regularly replace return line filters
7. Periodic Maintenance
Check mounting bolt torque every 1,000 operating hours
Regularly monitor system operating pressure to ensure it does not exceed rated values
For variable pumps, regularly check housing drain port flow—a significant increase in drain flow may indicate increased internal wear
If flow output decreases, response becomes sluggish, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly
