ZX240-3 Electronic Fuel Injection Control Valve

ZX240-3 Electronic Fuel Injection Control Valve

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

Hitachi Excavator ZX200-3/ZX210-3/ZX240-3 Control Valve

KYB Main Control Valve

Part No.: 4606144

Our company supplies the following series of spare parts:

1. Travel System (Motor, Gearbox) and Components

2. Swing System (Motor, Gearbox) and Components

3. Hydraulic Pump Assembly and Spare Parts

4. Swing Bearing/Slew Ring

5. Cylinders: Arm/Boom/Bucket Cylinders

6. Undercarriage Parts:

• Steel Track Shoes & Pads

• Rubber Track Shoes & Pads

• Track Link Assemblies

• Track Rollers, Carrier Rollers, Sprockets, Idlers, Track Adjusters, etc.

ZX240-3 Electronic Fuel Injection Control Valve: Technical Overview

1. Key Function & Role

TheElectronic Fuel Injection Control Valve(EFI Valve) is a critical component in theHitachi ZX240-3 excavator's engine management system, responsible forprecisely regulating fuel deliveryto the combustion chamber. Unlike traditional mechanical systems, it enables:

• Real-time fuel-air ratio adjustmentsto optimize power output and emissions.

• Integration with the ECU (Engine Control Unit)for adaptive responses to load changes (e.g., during excavation or heavy lifting).

• Compliance with Tier 3/Stage IIIA emission standards(depending on production year).

2. Technical Specifications

【表格】

Parameter Details (Typical)

Operating Pressure 150–300 bar (dependent on engine speed and load)

Response Time <10 ms (critical for transient load handling)

Voltage Supply 12V/24V DC (matches excavator electrical system)

Flow Rate 0.5–3.0 L/min (adjustable via PWM signal from ECU)

Material High-grade stainless steel (valve body), corrosion-resistant coatings (internal seals)

Mounting Interface OEM-specific (matches Hitachi ZX240-3 fuel rail assembly)

3. Failure Modes & Diagnostics

Common issues include:

• Sticking Valve: Caused by debris or degraded fuel filters, leading torough idlingorstalling.

• Electrical Faults: Loose connectors may triggerengine warning lightsorlimp mode.

• Internal Leakage: Seal wear results inexcessive fuel consumptionorblack smoke.

Diagnostic Tools:

• Onboard ECU Readings: MonitorP0191(Fuel Rail Pressure Sensor) orP0261(Injector Circuit Low) codes.

• Pressure Testing: Use afuel rail pressure gaugeto verify valve output against OEM specs.

• Flow Rate Verification: Compare actual flow (via test bench) with the table above.

4. Replacement Procedure

Step-by-Step Guide:

1. Isolate Power: Disconnect battery and relieve fuel system pressure.

2. Remove Old Valve:

• Loosen thehigh-pressure fuel lineconnected to the valve.

• Unscrew the valve using atorque wrench(OEM-specified torque: 25–30 Nm).

3. Install New Valve:

• Applythread sealantto prevent leaks.

• Tighten to specifications and reconnect the fuel line.

4. Post-Replacement Checks:

• Bleed air from the fuel system.

• Run the engine at idle and monitor for leaks or abnormal noise.

• Use asmoke machineto verify no vacuum leaks in the intake system.

5. Maintenance Best Practices

• Fuel Quality: Useultra-low sulfur diesel (ULSD)to prevent internal corrosion.

• Filter Replacement: Change theprimary fuel filterevery 250 hours (or sooner in dusty environments).

• Software Updates: Periodically update the ECU firmware via Hitachi’sZaxisLinkdiagnostic tool.

7. Cab Assembly, Cab Glass, Cab Door, Cab Lock

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

3 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch , hydraulic system

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