Product Overview

This 723-40-71103 pilot pressure reducing valve assembly is a high-performance aftermarket hydraulic component designed for Komatsu medium excavators. Mounted on the main control valve or main pump block, it regulates the main high system pressure down to a stable low pilot control pressure around 3-4 MPa, supplying pressure for joystick and foot valve pilot control circuits. Full technical specifications are available on our dedicated spec sheet for reference. Built with robust construction, this valve resists internal wear, spool sticking and spring fatigue, delivering reliable performance under heavy-duty site conditions and preventing unexpected hydraulic failures. It fits Komatsu -7 and selected -8 series excavators including PC200-7, PC200LC-7, PC200-8, PC220-7, PC220LC-7, PC210-7, PC230-7, PC240-8K, PC290-8K, PC228US-3. It can also replace cross part numbers 723-40-71102, 723-40-71101, 723-40-71104, 723-40-71900, 723-40-71800 for hydraulic circuit maintenance.

FAQ

Q1: What common faults mean I need to replace the 723-40-71103 pressure reducing valve assembly?

A: The typical symptoms include no machine movement or failed pilot lock, slow and weak machine operation, and power loss after the machine warms up. These issues are usually caused by internal wear, stuck spool or spring fatigue inside the valve.

Q2: Which excavators does 723-40-71103 fit?

A: PC200-7, PC200LC-7, PC200-8, PC220-7, PC220LC-7, PC210-7, PC230-7, PC240-8K, PC290-8K, PC228US-3

Q3: What are the core parameters of this valve assembly?

Q4: What cross reference part numbers are compatible?

A: 723-40-71102, 723-40-71101, 723-40-71104, 723-40-71900, 723-40-71800.