20/925588 JCB Triple Gear Pump | 29+19+16cc 250 bar for Telehandler

Product Overview

The 20/925588, 20/902900, and 20/903300 are high-pressure hydraulic gear pumps manufactured by Parker Hannifin for JCB construction equipment, available in triple pump and twin pump configurations.

20/925588 is a Triple Gear Pump with a displacement configuration of 29 + 19 + 16 cc/rev (total 64 cc/rev), capable of simultaneous oil supply to three independent hydraulic circuits. This model is primarily compatible with JCB Telehandler series.

20/902900 and 20/903300 are both Twin Gear Pumps with displacement configurations of 33 + 29 cc/rev (total 62 cc/rev). The key differences are:

• 20/902900 — Clockwise rotation, SAE B 2-bolt flange, cross-reference 400/E0868

• 20/903300 — Counter-Clockwise rotation, SAE B 4-bolt flange, cross-reference 4074

Engineered as a direct OEM-replacement solution, these models fully comply with Parker original design standards and SAE 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.

Technical Specifications 

20/925588 Triple Gear Pump

• Model: 20/925588 (JCB Part Number)

• Cross References: 20/925356, 20925588, 7029530002

• Pump Type: Triple Gear Pump

• Front Pump Displacement: 29 cc/rev (29 L/min @ 1000 rpm)

• Middle Pump Displacement: 19 cc/rev (19 L/min @ 1000 rpm)

• Rear Pump Displacement: 16 cc/rev (16 L/min @ 1000 rpm)

• Total Displacement: 64 cc/rev

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

• Shaft Type: 1-inch diameter, 15-tooth SAE BB splined shaft

• Mounting Flange: SAE B 4-hole flange

• Maximum Working Pressure: 200 – 250 bar

• Weight: Approx. 38 kg

• Brand: Parker Hannifin

• Compatible Equipment: JCB Telehandler series

20/902900 Twin Gear Pump

• Model: 20/902900 (JCB Part Number)

• Cross References: 20/912800, 400/E0868, 20/903100

• Pump Type: Twin Gear Pump

• Front Pump Displacement: 33 cc/rev (33 L/min @ 1000 rpm)

• Rear Pump Displacement: 29 cc/rev (29 L/min @ 1000 rpm)

• Total Displacement: 62 cc/rev

• Rotation Direction: Clockwise (viewed from shaft end)

• Mounting Flange: SAE B 2-hole flange

• Shaft Type: Splined / Flat key (customizable)

• Maximum Working Pressure: 275 bar

• Housing Material: High-strength cast iron

• Brand: Parker Hannifin

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

20/903300 Twin Gear Pump

• Model: 20/903300 (JCB Part Number)

• Cross References: 4074

• Pump Type: Twin Gear Pump

• Front Pump Displacement: 33 cc/rev (33 L/min @ 1000 rpm)

• Rear Pump Displacement: 29 cc/rev (29 L/min @ 1000 rpm)

• Total Displacement: 62 cc/rev

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

• Shaft Type: 1-inch diameter, 15-tooth SAE splined shaft

• Mounting Flange: SAE B 4-hole flange

• Inlet: Single 2-inch SAE flange

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

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

• Maximum Working Pressure (Front Pump): 275 bar

• Maximum Working Pressure (Rear Pump): 275 bar

• Maximum Input Shaft Torque: 400 Nm

• Weight: Approx. 26 kg

• Housing Material: Cast iron

• Brand: Parker Hannifin

• Compatible Equipment: JCB 3CX / 4CX / 5CX Backhoe Loaders

Key Technical Advantages

1. Triple / Twin Pump Design – One Pump, Multiple Circuits
20/925588 features a triple pump configuration (29+19+16 cc/rev) with three stages driven by a common input shaft, enabling simultaneous oil supply to travel, steering, and implement hydraulic circuits of telehandlers. 20/902900 and 20/903300 feature twin pump configurations (33+29 cc/rev) for independent oil supply to loader and excavator systems of backhoe loaders. This design significantly reduces the number of pumps required, saves installation space, and lowers system complexity.

2. High-Strength Cast Iron Housing – Durable & Reliable
The pump housing is manufactured from high-strength cast iron, 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 construction equipment operating in harsh conditions over extended periods.

3. High-Pressure Capability – Heavy-Duty Applications
20/902900 and 20/903300 deliver maximum working pressure up to 275 bar; 20/925588 delivers up to 200–250 bar. Fully meeting the high-pressure demands of telehandler and backhoe loader heavy-duty operations.

4. Large Displacement with High Flow Output
20/925588 triple pump delivers 64 cc/rev total displacement with ample combined flow. 20/902900 and 20/903300 twin pumps deliver 62 cc/rev total displacement with independent circuit supply. Fully meeting the high-flow multi-circuit requirements of large construction equipment.

5. JCB OEM Specification – 100% Direct Interchangeability
All models are manufactured to JCB / Parker original technical specifications, with flange dimensions, spline shaft specifications, and mounting interfaces identical to OEM pumps. 20/902900 is cross-compatible with 400/E0868 and 20/912800; 20/903300 is cross-compatible with 4074; 20/925588 is cross-compatible with 7029530002. 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

20/925588

• JCB Telehandlers: JCB 530/531/532/533/535/536/537/540/541/550 series, including 530 SWAY, 531-70 SWAY, 533-105, 535-125, 535-140, 536-60, 540-140, 550-140 and other variants

20/902900

• JCB Backhoe Loaders: JCB 3CX, 3CX 444 SUPER, 3CX CONTRACTOR, 3CX SM, 3CX SMT, 3CX PC, 4CX, 4CX 444, 4CX SM 444, 4C, 4CN, 214-2/4, 214S, 214SM-4, 215-2/4, 215E, 215S, 215SM-4, 216-4, 217-2/4, 217S and all series variants

20/903300

• JCB Backhoe Loaders: JCB 3CX, 3CX 444 SUPER, 4CX, 4CX 444, 4CX 444 SUPER, 4CX SM 444, 4CN, 4C, 214/215/217 series, and JCB 5CX series

Expert Maintenance Tips

1. Model Confirmation
20/902900 and 20/903300 share the same 33+29 cc/rev displacement but have different rotation directions—20/902900 features clockwise rotation, 20/903300 features counter-clockwise rotation. Before installation, always verify the complete part number on the original pump nameplate and select the correct rotation direction. 20/925588 is a 29+19+16 cc/rev triple pump with a completely different structure from the twin pumps.

2. Rotation Direction Confirmation
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 gears and bearings within a short period.

3. Installation Precautions

• Thoroughly clean the mounting flange and splined shaft mating surfaces before installation to ensure no debris remains

• 20/902900 features SAE B 2-hole flange; 20/903300 features SAE B 4-hole flange; 20/925588 features SAE B 4-hole flange

• All models feature 1-inch diameter, 15-tooth SAE splined shaft

• 20/903300 inlet: single 2-inch SAE flange; front pump outlet: 1 1/16″-12 UNF; rear pump outlet: 7/8″-14 UNF

• Use Parker-specified torque values for mounting bolts—avoid over-tightening which may cause cast iron housing distortion or bolt fracture

• Must completely depressurize the hydraulic system before installation—lower all attachments to the ground and operate all levers with the engine off

4. First Start-Up and Bleeding

• Before first start-up, must fill all pump stages with hydraulic oil through the inlet port—never start dry

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from all stages and the system

• Check each stage separately for abnormal noise or leakage—while cast iron pumps are more durable than aluminum counterparts, they remain sensitive to cavitation

5. Fluid and Filtration

• Use high-quality anti-wear hydraulic oil compliant with JCB specifications

• Maintain system oil cleanliness to ISO 4406 18/15 or better

• Cast iron gear pumps are sensitive to fluid cleanliness—regularly replace return line filters

• Flush the entire hydraulic system before installing a new pump to remove metal particles from previous pump wear

6. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor operating pressure of each stage—20/902900 and 20/903300 not to exceed 275 bar; 20/925588 not to exceed 250 bar

• Regularly inspect and replace shaft seals to prevent leakage

• If flow output decreases, loss of power on all hydraulic functions, very slow hydraulic response (especially when oil is warm), loud whining noise indicating cavitation or internal wear, overheating of hydraulic oil, or metal particles found in hydraulic oil or filter—inspect and replace worn components promptly