Hydraulic pump for JCB JS220LC

Product & Spec Guide

JCB JS220LC hydraulic pump

OEM replacement main hydraulic pump assemblies for 22-ton crawler excavators

OEM Fit
1-Year Warranty
Europe-Wide Shipping

The JCB JS220LC (including standard JS220 and JS220LC series) is a highly powerful 22-ton class crawler excavator, engineered for high-production trenching, earthmoving, material handling, and civil construction. Valued for its massive digging forces, fast cycle times, and legendary reliability, the machine relies on its primary hydraulic system to power every movement. The heart of this system is the **main hydraulic pump assembly**, which converts the mechanical output of the diesel engine into high-pressure fluid power.

Continuous heavy load cycles will eventually lead to component wear. If your excavator suffers from slow joystick response, engine stalling, uneven travel tracking, or loud whining sounds from the pump compartment, your main pump is likely worn out. We provide **high-performance, OEM-quality replacement main hydraulic pumps** for the JCB JS220LC, engineered to restore factory-specification digging power, speed, and overall jobsite productivity.

In need of replacement parts? View all spare parts and options for JCB machines →

1. OEM Compatibility & Part References

To ensure a direct, plug-and-play fit without modifying hydraulic hose connections or control linkages, our replacement pumps are cross-referenced and fully compatible with these key OEM and manufacturer references:

215/13686: JCB OEM reference number for JS220 main pump assemblies (listed with Kawasaki pump).
20/925770: Another key genuine JCB OEM part number for JS220LC hydraulic pumps.
KRJ4573: Aftermarket cross-reference widely used for JS220 main pumps.
K3V112DTP1M9R-9CA9+FP: Kawasaki high-performance swashplate-type tandem axial piston pump used as original equipment on factory-fitted systems.

If the identification nameplate on your current main pump displays any of these references, our replacement unit will fit perfectly.

2. Technical Specifications

This technical table outlines the mechanical parameters, operating pressure limits, and regulator configurations for the JCB JS220LC main hydraulic pump:

Machine Class

22.0 Metric Tons (JCB JS220 / JS220LC Crawler Excavators)

Pump Configuration

Tandem axial piston double pump (two separate variable-displacement groups on a single shaft)

Displacement (cc/rev)

112 cc/rev x 2 (Kawasaki K3V112DTP)

Rated Operating Pressure

34.3 MPa (343 bar / 4,980 PSI)

Maximum Peak Pressure

37.3 MPa (373 bar / 5,410 PSI) with Power Boost engaged

Max Discharge Flow

2 x 220 L/min (2 x 58.1 gpm)

Pilot System Pump

Integrated fixed-displacement gear pilot pump (approx. 20 L/min, 4.0 MPa / 40 bar output)

3. Pump Assembly & Core Components

The tandem pump assembly utilizes several critical mechanical and hydraulic systems to govern oil flow and system pressure:

Tandem Piston Groups

Two inline cylinder barrels containing nine pistons each. Rotating cylinder groups draw oil from the intake port and push it into the control valve block.

Swashplate Cradle & Servo Pistons

The angle of the swashplate determines the piston stroke length. Servo pistons adjust this swashplate angle dynamically to stroke or destroke the pump based on operator demand.

NFC Regulators

Negative Flow Control (NFC) keeps the pump destroked to minimum flow when joysticks are in neutral, saving fuel. Engaging the controls drops the NFC return pressure, prompting the regulators to stroke the pump for immediate flow.

Horsepower Overrides

Mechanical torque-limiting spring packs prevent the engine from stalling. If hydraulic pressure spikes under heavy digging, these overrides destroke the swashplate automatically to protect the engine torque curve.

4. Failing Pump Diagnostics & Symptoms

Main hydraulic pumps operate under extreme pressure and thermal stress. Watch for these common indicators of pump deterioration:

Loss of Cycle Speed Under Load

Sluggish cylinder movement (especially once the hydraulic oil warms up and thins) points to internal volumetric slippage. Worn piston shoes or scratched cylinder face plates allow high-pressure oil to slip into the case drain rather than working the cylinders.

Engine Bogging or Stalling

If the engine bogs down as soon as you pull a joystick, the regulator spool valves may be stuck. They fail to destroke the swashplate when pressure spikes, overloading the engine.

Metallic Screeching or Whining

Bearing damage or cavitation (imploding air bubbles in the oil) creates a distinct, loud whining noise. Running a pump with this condition leads to catastrophic failure.

Stiff Joystick Response

If the pilot gear pump mounted on the back of the main assembly wears out, pilot circuit pressure will drop, making control joysticks heavy and sluggish.

CRITICAL REQUIREMENT: Flushing the Hydraulic System
When a hydraulic main pump suffers a catastrophic failure, it releases millions of microscopic brass and steel particles into the hydraulic circuit. These particles travel through the control valves, cylinders, and travel motors. If you install a replacement pump without thoroughly flushing the hoses, cleaning the main reservoir tank, and replacing the suction and return filter elements, the remaining debris will flow back into the new pump, destroying its pistons and valve plate within a few hours of operation.

Frequently Asked Questions About JCB JS220LC Pumps

How do I verify if this main hydraulic pump fits my JCB JS220LC?

This main hydraulic pump is a direct replacement for JCB OEM references 215/13686, 20/925770, and KRJ4573. It houses the Kawasaki K3V112DTP tandem axial piston pump (specifically K3V112DTP1M9R-9CA9+FP) and fits all standard JCB JS220LC crawler excavators in the 22-ton class.

Does the replacement pump include the regulators and pilot gear pump?

Yes. Our replacement main hydraulic pump is delivered as a complete, pre-assembled unit, including both variable displacement piston groups, the pilot gear pump, and the negative flow control (NFC) regulators pre-calibrated to factory specifications.

What are the typical symptoms of a failing main pump on a JCB JS220LC?

Common symptoms include sluggish bucket, boom, or arm speeds (especially as the hydraulic fluid warms up), drift during straight travel, excessive engine lugging or bogging under load (sticking regulators failing to destroke), or loud grinding and whining noises from the pump compartment.

Why must I flush the hydraulic system when installing a new pump?

If a pump fails mechanically, it releases fine metal particles and brass shavings into the oil. Installing a new pump without flushing the system, cleaning the hydraulic reservoir, and replacing all filters will cycle these particles back into the new pump, destroying it within hours.

5. Related Technical Guides & Internal Link Building

To keep your excavator fleet running at peak performance, explore our library of machine guides and maintenance articles. If you are diagnosing tracking issues, consult our detailed guide on tracking speed differences on excavators or read about identifying the signs of a bad final drive. If you need to separate pump issues from travel motor issues, refer to our final drive troubleshooting guide, and learn the fundamental differences in our article on final drives vs. travel motors.

For detailed information on pump mechanics, read about the principles of hydraulic main pumps or see our technical analysis on the function of a hydraulic main pump. When it comes to replacement, check our walk-throughs on how to change a final drive and how to repair a final drive. Make sure to get precise measurements with how to measure a final drive correctly, and prevent future failures by reading our final drive maintenance guide.

If you also operate other machines in your fleet, you may find our other machine-specific final drive optimization guides helpful: view our guides for the Hyundai R290NLC-7, the Case CX210B, the Volvo EC210B, the JCB JS200LC, the Hyundai R140LC-7, the Daewoo Solar 130LC-V, and the Hitachi ZX210LC-3 final drives, and the Kobelco SK350LC-8 main hydraulic pump, the Doosan DX255LC main hydraulic pump, the Volvo EC210C main hydraulic pump, the Case CX210 main hydraulic pump, the JCB JS160NLC main hydraulic pump, the New Holland E200SR main hydraulic pump, the Case CX330 main hydraulic pump, the Hyundai R290LC-7A main hydraulic pump, the Hyundai R140LC-7A main hydraulic pump, the Kobelco SK210LC-6 main hydraulic pump, the New Holland E215 main hydraulic pump, the Caterpillar 320D main hydraulic pump, the Hyundai R320LC-7 main hydraulic pump, the Caterpillar 312C main hydraulic pump, the Kobelco SK210LC-10 main hydraulic pump, the Volvo EC460B main hydraulic pump, the Volvo EC360B main hydraulic pump, and the Volvo EC290B main hydraulic pump.

Browse our extensive hydraulic spare parts inventory. If you need direct technical assistance or would like to request a quote, fill out our quote form below or email our team in Horsens, Denmark at info@mecatra.com.

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