sy135 sy365 Sany Excavator Hydraulic Main Control Valve Drain Pin Cover For Distribution Valve Housi

In this technical walkthrough, we demonstrate the installation and function of the Sany Excavator Hydraulic Main Control Valve Drain Pin Cover for SY135 and SY365 models. You'll see how this critical component protects the distribution valve housing assembly and learn about its role in the proportional pilot hydraulic control system that governs boom, stick, bucket, and slewing operations.