Compatible Replacement Vented Counterbalance Valve for JLG – OEM No. 4640709

🟦 Product Overview

This is an aftermarket replacement hydraulic vented counterbalance valve designed for JLG boom lifts and aerial work platforms.

It replaces:

👉 OEM No. 4640709

This valve is used in the hydraulic system load-holding circuit, ensuring safe and stable movement of boom and platform functions.

⚠️ Important Before Ordering

Please confirm:

• Machine model
• Serial number
• OEM part number
• Old valve photo
• Hydraulic system configuration

🟩 Product Specifications

🟨 Product Description

The JLG 4640709 vented counterbalance valve is a critical hydraulic safety component used in aerial work platforms.

It controls hydraulic pressure in lifting circuits to ensure:

• Stable boom movement
• Load holding under pressure
• Prevention of uncontrolled descent
• Smooth cylinder operation

This aftermarket replacement valve is widely used in:

• Hydraulic system repair
• Boom lift maintenance
• Cylinder control refurbishment
• Fleet equipment overhaul

🟥 Compatibility Notice

This product replaces:

👉 4640709

Compatible machine models include:

• JLG E400A / E400AJ / E400AN
• JLG M400A / M400AJ
• JLG 400S / 460SJ
• JLG 600S / 600SJ
• JLG 800S / 860SJ
• Selected boom lift hydraulic systems

⚠️ Compatibility depends on:

• Hydraulic block version
• Machine serial number
• Valve body configuration
• System pressure rating