723-40-51401 Hydraulic Relief Valve for Komatsu PC120-6, PC200-7, PC210-6

   The 723-40-51401 is a cartridge-style relief valve engineered for the demanding duty cycles of Komatsu’s 12-to-22-ton excavators. While the main relief valve protects the pump, the 723-40-51401 provides localized protection for the work equipment. For example, if the bucket hits a rock while the control lever is in neutral, this valve "cracks" open to dissipate the shock energy, protecting the cylinder and pins from the massive pressure spike.

The SPARKLING MACHINERY NEW 723-40-51401 Relief Valve Photo:

Why Choose the SPARKLING 723-40-51401 Relief Valve?

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •    - Shock Absorption: Specifically designed to handle rapid pressure spikes, protecting hydraulic cylinders from "ballooning" or internal seal failure.

                                                                      •    - Hardened Poppet & Seat: Manufactured from high-grade alloy steel to resist "wire-drawing" and erosion, ensuring the valve maintains its pressure setting over time.

                                                                      •    - Versatile Fitment: Compatible with both the older Dash-6 series and the technologically advanced Dash-7 series machines.

                                                                      •    - Direct OEM Specification: Precision-threaded for a perfect fit in the main control valve manifold, ensuring no external leaks.

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Q&A Section

Q1: How can I tell if the 723-40-51401 relief valve is failing?

A: If one specific function (like the bucket curling) feels weak or "drifts" under load while all other functions are strong, the port relief valve for that circuit is likely leaking or has a broken internal spring.

Q2: Is the 723-40-51401 interchangeable with the 723-40-50100?

A: No. The 723-40-50100 is typically a Main Relief Valve (larger flow capacity), whereas the 723-40-51401 is a Port Relief Valve. They have different physical dimensions and pressure settings. Always match the part number exactly.

Q3: Does this valve come pre-set to the correct pressure?

A: Most OEM and high-quality aftermarket valves come factory-set to a standard specification. However, it is vital to verify the pressure with a gauge after installation, as different machine circuits (Boom vs. Bucket) may require slightly different settings.

About SPARKLING MACHINERY:
   - Founded in 2013, SPARKLING focuses on high-quality excavator parts across hydraulics, undercarriage, engines and electrical systems. We prioritize stability, precision and continuous service, offering worldwide distribution, tailored solutions and strict QC to help customers reduce cost and increase uptime.

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