723-10-11202 Main Relief Valve for Komatsu PC30, PC35MR-2, PC40, PC45

   The 723-10-11202 is engineered for the precise hydraulic requirements of Komatsu’s compact line. In mini excavators like the PC35MR-2, space is limited, and the hydraulic systems operate at high power-to-weight ratios. This valve ensures that the machine provides maximum breakout force without over-pressurizing the pilot or main circuits, extending the life of the main pump and cylinder seals.

The SPARKLING MACHINERY NEW 723-10-11202 Relief Valve Photo:

Why Choose the SPARKLING 723-10-11202 Relief Valve?

• • • • • • • • • • • • • • • • • • • • • • • • •    - Compact Reliability: Specifically sized for mini excavator control blocks where standard-class valves will not fit.

                                                •    - Hardened Poppet Construction: Built with wear-resistant steel to prevent internal "leaking" or pressure drift, ensuring the machine maintains consistent power during long shifts.

                                                •    - Sensitive Pressure Response: Reacts instantly to hydraulic spikes during rock-breaking or heavy-duty trenching.

                                                •    - Direct OEM Fit: Designed as a 1-to-1 replacement for the 723-10-11202 assembly, ensuring the threads and O-ring seats match the distributor housing perfectly.

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Q&A Section

Q1: How do I know if my 723-10-11202 valve is bad?

A: If your machine loses power across all functions (boom, arm, and bucket all feel "weak") or if the engine doesn't "load up" when you reach the end of a stroke, the main relief is likely stuck open. Conversely, if your hoses are frequently bursting, the valve may be stuck closed.

Q2: Can I adjust the 723-10-11202 to get more power?

A: While there is an adjustment screw, it is factory-set to Komatsu’s safety specifications. Increasing the pressure beyond these limits can damage your pump and significantly shorten the life of your excavator. Only adjust while using a high-quality hydraulic pressure gauge.

Q3: Is this the same as a "Port Relief" valve?

A: No. The 723-10-11202 is typically the Main Relief Valve for the entire system. Port relief valves (which protect only one cylinder) are usually smaller and have different part numbers.

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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