Hydraulic Main Control Valve 190-7717 for E308B 308C Excavator

This hydraulic main control valve assembly is the core distribution component of the excavator hydraulic system, compatible with the E308B and 308C models. It regulates the flow and pressure of hydraulic oil for the boom, arm, bucket, and travel functions. Manufactured to strict standards, it delivers stable performance and reliable sealing, making it well suited for equipment repair and replacement.

Interchange Part Number: 190-7717

The following symptoms may indicate a faulty main control valve and can help confirm the need for replacement:

• Slow movement of the boom, arm, or bucket
• Unstable action or jitter during operation
• Oil leakage from valve joints and sealing surfaces
• High hydraulic system pressure with frequent relief
• Single action unresponsive or weak in power

Please review the following guidelines before ordering and installing to ensure correct fitment and reliable operation:

• Confirm the machine model before ordering
• Check the part number to match your old valve
• Test before installation, and replace sealing kits together if needed
• Keep the work area clean during installation to prevent dirt from entering the hydraulic circuit