Parker 20/902900 20/911200 20/912800 Gear Pump for JCB 3CX 4CX Loadall

Product Overview

The Parker Hannifin 20/902900, 20/911200, and 20/912800 series are OEM-specification tandem (twin-section) hydraulic gear pumps engineered specifically for JCB 3CX, 4CX backhoe loaders and Loadall telehandlers. As the heart of the hydraulic system, these pumps deliver reliable pressure oil flow for loader, backhoe, telehandler boom lift, steering, and auxiliary functions.

This series offers two displacement configurations — 33+29 cc/rev (20/902900 / 20/912800) and 41+29 cc/rev (20/911200) — comprehensively covering JCB backhoe loader and Loadall models across different power ratings and hydraulic system configurations. The 20/902900 and 20/912800 feature identical displacement specifications and technical parameters, and are fully interchangeable within the JCB OEM parts system.

As direct OEM replacement solutions, these products are manufactured to strict Parker technical standards, ensuring 100% interchangeability with original equipment. Every unit undergoes 100% simulated duty-cycle testing to validate volumetric efficiency, thermal performance, and seal integrity under rated load conditions — guaranteeing reliable operation in heavy-load, high-dust, and high-temperature environments.

Technical Specifications 

20/902900 – 33 + 29 cc/rev Configuration (Counter-Clockwise Rotation)

• Model: 20/902900 (JCB OEM Part No.)

• Pump Type: Twin/Tandem Gear Pump

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

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

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

• Drive Shaft: 1″ Diameter, parallel keyed shaft

• Mounting Flange: SAE B, 2-hole flange

• Inlet Port: Combined 2″ SAE flange inlet

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

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

• Front Pump Max. Working Pressure: 275 bar

• Rear Pump Max. Working Pressure: 275 bar

• Max. Input Shaft Torque: 325 Nm

• Weight: 26 kg

• Compatible Models: JCB 3CX, 3DX, 4CX, 214/215/217 series backhoe loaders and Loadall

• Replaces JCB Part Numbers: 400-E0868, 400/E0868, 332/G6350, 20/912800, 20/903100, 7029122001, 7470-4070-4072

20/912800 – 33 + 29 cc/rev Configuration (Counter-Clockwise Rotation)

• Model: 20/912800 (JCB OEM Part No.)

• Pump Type: Twin/Tandem Gear Pump

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

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

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

• Drive Shaft: 1″ Diameter, parallel keyed shaft

• Mounting Flange: SAE B, 2-hole flange

• Inlet Port: Combined 2″ SAE flange inlet

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

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

• Front Pump Max. Working Pressure: 275 bar

• Rear Pump Max. Working Pressure: 275 bar

• Max. Input Shaft Torque: 325 Nm

• Weight: 26 kg

• Compatible Models: JCB 3CX, 4CX backhoe loaders

• Replaces JCB Part Numbers: 400-E0868, 400/E0868, 332/G6350, 20/902900, 20/903100, 7029122001, 7470-4070-4072

20/911200 – 41 + 29 cc/rev Configuration (Counter-Clockwise Rotation)

• Model: 20/911200 (JCB OEM Part No.)

• Pump Type: Twin/Tandem Gear Pump

• Front Pump Displacement: 41 cc/rev (41 L/min @ 1000 rpm)

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

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

• Drive Shaft: 1″ Diameter, parallel keyed shaft

• Mounting Flange: SAE B, 2-hole flange

• Inlet Port: Single 2″ SAE flange inlet

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

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

• Front Pump Max. Working Pressure: 220 bar

• Rear Pump Max. Working Pressure: 275 bar

• Max. Input Shaft Torque: 325 Nm

• Weight: 26 kg

• Compatible Models: JCB 3CX, 4CX, 214/215/217 series backhoe loaders and Loadall

• Replaces JCB Part Numbers: 7441, 4071, 20/903200

Key Technical Advantages

1. Parker OEM Quality – 100% Drop-In Interchangeability

Manufactured to strict Parker Hannifin factory specifications, all mounting dimensions, SAE B 2-hole flange interfaces, and 1″ parallel keyed shaft configurations are identical to original Parker pumps. End users can achieve direct drop-in replacement without any modifications — significantly reducing equipment downtime. The 20/902900 and 20/912800 are fully interchangeable within the JCB OEM parts system, offering maximum procurement flexibility.

2. Tandem Pump Design – Two Pumps in One Compact Unit

The tandem (twin-section) gear pump configuration integrates two independent pump sections (front + rear) into a single housing, providing separate pressure oil sources for the main working hydraulics (loader/backhoe/telehandler boom lift) and auxiliary systems (steering/servo control). This compact design saves installation space, reduces system complexity, and enhances overall hydraulic system reliability. The 20/911200 features different working pressure ratings for front and rear pumps (front 220 bar / rear 275 bar), optimized for the specific demands of each hydraulic circuit.

3. Two Displacement Configurations – Full JCB Model Coverage

This series offers two displacement options — 33+29 cc/rev (20/902900 / 20/912800) and 41+29 cc/rev (20/911200) — comprehensively covering JCB 3CX, 3DX, 4CX, 214/215/217 series backhoe loaders and Loadall telehandlers across different power ratings and hydraulic system configurations. A single product line covers a wide range of equipment types, significantly simplifying spare parts inventory management.

4. High-Strength Cast Iron Housing – Built for Harsh Conditions

The pump housing is constructed from high-strength cast iron, offering excellent rigidity, durability, and contamination tolerance. In demanding environments such as construction sites, mining operations, and agricultural fields — characterized by high dust levels, strong vibration, and extreme temperature fluctuations — the cast iron housing effectively protects internal precision components against external impact, thermal distortion, and oil contamination.

5. Full SAE Standard Interface – Simplified Installation and Maintenance

All products in this series feature SAE standard inlet ports, outlet ports, mounting flanges, and drive shafts. Unified interface standards mean that maintenance personnel can complete pump replacement without special tools or adapters, further reducing equipment downtime.

Application Areas

The Parker 20/902900 / 20/911200 / 20/912800 series tandem gear pumps are widely compatible with the following JCB equipment models:

JCB Backhoe Loaders:

• JCB 3C / 3CX Series (including 3CX, 3CX CM, 3CX Contractor, 3CX PC, 3CX-4T, 3CXE, 3CXSM, 3CXT, 3CX444 SUPER, 3CX444S PC, and more)

• JCB 3D / 3DX Series

• JCB 4C / 4CN / 4CX Series (including 4C, 4C PC, 4CN, 4CN PC, 4CN444, 4CX444, 4CX444 SUPER, 4CXSM444, and more)

• JCB 214 / 215 / 216 / 217 Series (including 214-2, 214-4, 214S, 215-2, 215-4, 215S, 216-4, 217-2, 217-4, 217S, and more)

JCB Loadall Telehandlers:

• JCB Loadall series telehandlers

Expert Maintenance Tips

1. Correct Model Selection – Understanding the Three Configurations

This series includes three different model configurations. Always verify the model number on the original pump nameplate before selection:

• 20/902900: Front 33 + Rear 29 cc/rev, Counter-Clockwise rotation

• 20/912800: Front 33 + Rear 29 cc/rev, Counter-Clockwise rotation(Identical to 20/902900, different JCB internal part number)

• 20/911200: Front 41 + Rear 29 cc/rev, Counter-Clockwise rotation(Higher flow output for higher power rating models)

2. Verify Rotation Direction – Critical Step

All three models in this series feature Counter-Clockwise rotation (viewed from shaft end) . Always confirm the rotation direction of the original pump before installation. Incorrect selection will result in pump malfunction or catastrophic failure.

3. Distinguish Standard Models from PC (Precision Control) Models

Certain models are applicable to machines equipped with Precision Control (servo) systems (e.g., 3CX PC, 3CX-4T PC, 4CX444 PC, etc.). Always verify machine serial number and hydraulic system configuration before selection.

4. Prime the Pump Before First Start

Fill the pump cavity with clean hydraulic fluid through the inlet port prior to initial startup. Dry-starting will cause rapid wear to gears and bearings under unlubricated conditions, potentially leading to catastrophic pump failure.

5. Replace Hydraulic Oil and Filters Simultaneously

When replacing the main hydraulic pump, we strongly recommend replacing all hydraulic oil and filters at the same time. Metal particles and contaminants in old oil will rapidly damage new pump internal components. The suction flange O-ring must also be replaced to ensure 100% seal on the suction line and prevent cavitation.

6. Maintain Fluid Cleanliness

For optimal Parker pump service life, we recommend a minimum filtration level of ISO 4406 19/17/14 or NAS 1638 Class 8. Regularly inspect filter elements to prevent contaminants from accelerating gear and bearing wear.

7. Periodic Torque Check on Mounting Bolts

Given the common use of these pumps in high-vibration equipment, we recommend checking mounting bolt and flange bolt torque every 500 operating hours to prevent loosening-induced leakage or misalignment.