1/4 NPT Port Cabin Air Height Leveling Control Valve Kit for Hadley Mack Volvo

This Cabin Air Height Leveling Control Valve Kit is a pneumatic control valve assembly with 1/4" NPT port compatible with Hadley, Mack, and Volvo air suspension systems.

Product Overview

The cabin air height leveling control valve kit precisely regulates air pressure to maintain consistent ride height in truck cabins. Designed for heavy-duty applications, this valve kit works with Hadley, Mack, and Volvo air suspension setups to keep the cab level under varying loads. The 1/4" NPT port provides a standard connection for air lines, making it a direct-fit replacement for worn or leaking height control valves.

Key Features & Performance

• Standard 1/4" NPT female port threads for reliable air line sealing
• Internal valve mechanism responds quickly to height changes for immediate leveling
• Durable design withstands harsh under-cab environments and road debris
• Direct replacement for leveling valves on Hadley, Mack, and Volvo cabin air systems
• Maintains proper cab height to reduce driver fatigue and protect suspension components

Fitment & Compatibility

• Hadley cabin air suspension systems
• Mack truck models with cab air leveling
• Volvo truck models with cab air leveling
• Any system utilizing a 1/4" NPT port for height control valve mounting

Common Uses

• Replacing a faulty leveling valve on a tractor cabin air suspension
• Restoring automatic cab height adjustment on long-haul trucks
• Servicing air-ride systems on vocational trucks with cab leveling
• Replacing a leaking valve to restore proper cab air pressure control

Technical Specifications

• Port Size: 1/4" NPT
• Valve Type: Cabin Air Height Leveling Control Valve
• Compatible Brands: Hadley, Mack, Volvo

Frequently Asked Questions

Q: Is this valve a direct bolt-on replacement for the original Hadley valve? A: Yes, the valve is designed to replace Hadley and compatible leveling valves with a 1/4" NPT port; mounting bracket compatibility may vary by model.

Q: Does this kit include gaskets or mounting hardware? A: The kit typically includes the valve assembly only; reuse existing mounting hardware and gaskets unless they are damaged.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.