KOMATSU Solenoid Valve Replaced
Protect Your Komatsu Excavator with the Komatsu Solenoid Valve Replaced 723-40-56302 Komatsu excavators are built to handle tough digging and lifting. But hydraulic systems can be damaged by sudden pressure spikes or overloads. The Komatsu solenoid valve replaced by Flying Bull (OE No. 723-40-56302) is a safety valve and unloading valve designed to protect the hydraulic system on Komatsu PC200-6 and PC200-7 excavators. The 723-40-56302 solenoid valve is a key component in the excavator’s hydraulic system. It controls the flow and pressure of hydraulic oil by opening or closing internal passages. When the system operates normally, the valve allows oil to flow where needed. But when pressure exceeds safe limits – for example, if the bucket hits a buried rock or the arm stalls against an immovable object – the valve opens. It diverts excess oil to tank, reducing pressure and preventing damage to pumps, hoses, and cylinders. This Komatsu solenoid valve serves two critical functions: Safety valve – Limits maximum system pressure to a preset level. If pressure tries to rise above that level, the valve opens and relieves the excess. This protects components from burst or fatigue failure. Unloading valve – Dumps pump flow to tank when the system does not need pressure. This saves fuel and reduces heat generation when the excavator is idling or between cycles. Key features of the 723-40-56302 solenoid valve: Small size, light weight – The valve is compact, making it easy to install in tight spaces inside the hydraulic manifold or valve block. Easy installation and maintenance – The threaded cartridge design screws directly into a standard cavity. No pipes or hoses to disconnect. Simply unscrew the old valve and screw in the new one. High reliability – The valve works consistently under various working conditions – from hot summers to cold winters, from dusty job sites to wet conditions. Customizable – Different cracking pressures, flow rates, and seal materials can be ordered for specific applications. Application: This valve is mainly suitable for Komatsu excavator series PC200-6 and PC200-7. It is installed in the hydraulic system at a point where it can effectively monitor and regulate flow and pressure. Typical locations include the main pump discharge line, the implement control valve, or the attachment circuit. Installation and maintenance tips: Installation – Install the valve in the correct orientation according to the supplier’s instructions. Use the recommended torque (do not overtighten). Ensure the cavity is clean before insertion. Regular checks – Inspect the valve periodically for external leaks, sticking, or signs of damage. If the excavator exhibits symptoms such as slow operation, overheating, or pressure spikes, test the safety valve. Replace when damaged – A failed safety valve can leave the hydraulic system unprotected. Replace immediately if you find damage or if the valve does not hold pressure. Flying Bull’s Komatsu solenoid valve replaced 723-40-56302 is 100% brand new, manufactured in Zhejiang, China, and backed by a 1‑year warranty. Delivery takes 5–7 working days. Choose Flying Bull for reliable hydraulic protection in Komatsu excavators.
Product Introduction
Products Description
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OE NO.: 723-40-56302 |
Media: Oil |
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Warranty: 1 YEAR |
Condition: New, 100% Brand-new |
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Place of Origin: Zhejiang, China |
Item: Solenoid |
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Brand Name: FLYING BULL |
Quality: High-Quality |
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Delivery: 5-7 Working Days |
Pressure: Ordinary Pressure |
Hydraulic valve 723-40-56302 Construction machinery parts
The Komatsu solenoid valve group 723-40-56302 can adjust the flow rate in the hydraulic system by controlling the opening and closing of the solenoid valve, thus realizing the control of the speed or position of the mechanical equipment.
Application Scenario
- It is mainly applicable to Komatsu excavator series, especially PC200-6 and PC200-7 models.As a key component in the hydraulic system of excavator, is used to control the flow and pressure of hydraulic oil.
Function Description
- 723-40-56302 as a safety valve or unloading valve, its main function is to ensure that the excavator hydraulic system can automatically adjust or limit the flow rate and pressure of hydraulic oil in the case of overload or other abnormal conditions, so as to protect the system from damage.
Features and advantages
- Small size, light weight, easy installation and maintenance. The system combination has strong reliability and can work stably under various working conditions.It can be customized according to different needs.
Installation and maintenance
- Installation: It should be installed in the appropriate position of the excavator hydraulic system to ensure that the flow and pressure of the hydraulic oil can be effectively monitored and adjusted.
- Maintenance: Check the working status of the safety valve or discharge valve regularly to ensure that it is in good working condition. If there is any abnormality or damage, it should be replaced or repaired in time.
Precautions
- When purchasing and using, be sure to select the product that matches the excavator model and working environment.
- Follow the installation and use instructions provided by the supplier to ensure that the product will work properly and extend its service life.
- If you have any questions or problems, please contact the supplier or professional technical personnel for consultation and solution.
Company Introduction
Frequently Asked Questions (FAQ)
1. What is the OE number and basic application of this Komatsu solenoid valve?
The OE number is 723-40-56302. This valve is used as a safety valve or unloading valve in Komatsu excavators, specifically the PC200-6 and PC200-7 models. It controls hydraulic oil flow and pressure to protect the system from overload.
2. What is the difference between a safety valve and an unloading valve?
A safety valve (also called a relief valve) limits maximum system pressure. When pressure exceeds a set point, the valve opens and diverts oil to tank. An unloading valve dumps pump flow to tank when the system does not need pressure (e.g., during idling). The 723-40-56302 can perform both functions depending on how it is installed in the circuit.
3. What happens if the safety solenoid valve fails?
If the safety valve fails closed (does not open), pressure can build up beyond safe limits. That can burst hoses, damage the pump, or blow cylinder seals. If the safety valve fails open (leaks constantly), the system will lose pressure. The excavator will be slow, weak, or unable to lift. In either case, replace the valve immediately.
4. How do I know if this solenoid valve fits my Komatsu excavator?
This valve is designed specifically for Komatsu PC200-6 and PC200-7 excavators. If you have a different Komatsu model, check your original OE number. If it matches 723-40-56302, this valve will fit. Do not rely only on machine model – always compare the part number.
5. What are the advantages of this Komatsu solenoid valve?
Key advantages include: small size and light weight (easy to install in tight spaces), easy maintenance (screw-in cartridge design), high reliability under various working conditions, and customization options (different pressure settings, seal materials).
6. How do I install and maintain the 723-40-56302 solenoid valve?
Installation: Screw the valve into the correct cavity at the recommended torque. Ensure the cavity is clean. Use new seals if provided.
Maintenance: Periodically check for external leaks or signs of sticking. If the excavator shows symptoms of pressure problems (weak digging, slow operation, overheating, or sudden pressure spikes), test the valve. Replace immediately if damaged.
7. Can I use this solenoid valve on other Komatsu models or other brands?
The 723-40-56302 is designed for Komatsu PC200-6 and PC200-7 excavators. It may fit other Komatsu models that use the same hydraulic manifold cavity and pressure range. It is not intended for other brands (Caterpillar, Hitachi, Volvo, etc.) because cavity dimensions and pressure settings differ. Always verify your original OE number before ordering.
8. Does the Komatsu solenoid valve replaced 723-40-56302 come with a warranty?
Yes. Flying Bull provides a 1‑year warranty against manufacturing defects. Damage caused by contaminated fluid, incorrect installation (wrong torque, missing seals), overpressure beyond valve rating, or voltage issues is not covered. Always use clean hydraulic oil and follow proper installation procedures.
9. Is this valve a direct replacement for the original Komatsu part?
Yes. This valve is manufactured to replace the original Komatsu 723-40-56302. It matches the cavity dimensions, pressure rating, flow characteristics, and electrical specifications. Always confirm fitment by comparing your old valve to the specifications provided.
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