800519 MV3 Dash Air Brake Control Valve for Freightliner Kenworth Peterbilt

This Dash Air Brake Control Valve is a heavy-duty pneumatic control valve compatible with Freightliner, Kenworth, and Peterbilt trucks and matches OEM Part# 800519, MV-3.

Product Overview

The 800519 MV-3 Dash Air Brake Control Valve is a pneumatic dash valve that actuates the tractor parking brakes and controls trailer air supply in commercial vehicles. This direct-fit replacement matches OEM specifications for Freightliner, Kenworth, and Peterbilt trucks, restoring correct air brake control. Heavy-duty construction ensures long service life under demanding road conditions.

Key Features & Performance

• Direct OEM-style replacement for part numbers 800519 and MV-3
• Modulates parking brake and trailer air supply from a single dash control
• Rugged die-cast metal housing resists corrosion and vibration
• Smooth, precise pneumatic actuation for reliable daily use
• Pre-set port configuration simplifies installation

Fitment & Compatibility

• Freightliner heavy-duty trucks (Cascadia, Century Class, Columbia, etc.)
• Kenworth heavy-duty trucks (T680, T800, W900, etc.)
• Peterbilt heavy-duty trucks (389, 579, etc.)
• Other commercial vehicles with OEM 800519/MV-3 dash valve layout

Common Uses

• Engaging and releasing tractor parking brakes
• Controlling trailer air supply for air-ride and brake systems
• Replacing a faulty or leaking OEM dash air brake valve
• Heavy-duty truck repair and fleet maintenance

Technical Specifications

• Part Number(s): 800519, MV-3
• Valve Type: MV-3 Dash Air Brake Control Valve
• Function: Parking brake and trailer air supply control
• Mounting Style: Dash-mounted push-pull knob
• Material: Heavy-duty metal and brass components

Frequently Asked Questions

Q: What symptoms indicate I need a new MV-3 dash valve? A: Air leaks from the dash valve, a knob that won’t stay pushed in, or inability to hold parking brake pressure typically signal a failing valve and require replacement.

Q: Will this valve fit all Freightliner, Kenworth, and Peterbilt models? A: It fits models originally equipped with the MV-3 dash valve and OEM part numbers 800519; always compare your existing valve configuration and part number before ordering.

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