0468500154 | Genuine Haldex® ABS Valve, 4 Port, 12V, Spring Brake Priority

An ABS (Anti-lock Braking System) valve 0468500154 is a critical component of a vehicle's braking system that regulates hydraulic brake pressure to each wheel during sudden or hard braking. Controlled by the ABS electronic control unit (ECU), the valve rapidly increases, decreases, or maintains brake pressure based on input from wheel speed sensors. This prevents the wheels from locking, helping the driver maintain steering control, improve vehicle stability, and reduce the risk of skidding on slippery or uneven road surfaces. By optimizing brake performance, the ABS valve enhances overall driving safety and braking efficiency. ABS Valve, 4 Port, 12V, Spring Brake Priority For Multiple-axle trailers with 2S/1M and 4S/2M trailer ABS systems

General Specifications

Specifications

• equipment type:

  multi-axle

• pressure:

  4.0 crack pressure

• delivery port:

  3/8" (4)

• reservoir port:

  1/2"

• supply port:

  3/8"

• spring brake port:

  3/8"

• voltage:

  12v

• control port:

  3/8"

• brand:

  haldex

• mount type:

  1/2" & 3/4" reservoir

• system:

  2s/1m, 4s/2m

• equipment:

  multi-axle

• priority:

  spring

• Depth:

  9.88 in

• Weight:

  4.5 lb

Fitment

• Application: Multiple-axle trailers
• ABS Configuration: 2S/1M and 4S/2M trailer ABS systems
• Voltage: 12V
• Valve Type: 4-Port FFABS, Spring Brake Priority
• OEM Replacement Part Number: N4306JD
• Replaces: AL430665

This valve is commonly found on commercial trailers manufactured by companies such as:

• Great Dane
• Utility Trailer Manufacturing Company
• Wabash National
• Hyundai Translead
• Stoughton Trailers

Purpose & Function

• Prevents Wheel Lock-Up – Regulates brake pressure to prevent the wheels from locking during sudden or hard braking.
• Maintains Steering Control – Allows the driver to continue steering while braking, helping to avoid obstacles.
• Improves Vehicle Stability – Helps keep the vehicle stable and reduces the risk of skidding or loss of control.
• Optimizes Braking Performance – Automatically adjusts brake pressure to maximize traction on different road surfaces.
• Enhances Safety – Reduces the likelihood of accidents by improving braking effectiveness, especially in emergency situations.
• Reduces Tire Wear – Prevents excessive tire wear caused by locked wheels dragging across the road.
• Supports ABS Operation – Works with the ABS electronic control unit (ECU), wheel speed sensors, and hydraulic or air brake system to provide efficient anti-lock braking performance.

Signs of a Bad ABS Valve

• ABS Warning Light Is On – The ABS warning light illuminates on the dashboard, indicating a fault in the anti-lock braking system.
• Reduced ABS Performance – The ABS may fail to activate during hard braking, increasing the risk of wheel lock-up.
• Brake Pedal Feels Unusual – The brake pedal may feel soft, stiff, or respond inconsistently during braking.
• Uneven Braking – The vehicle may pull to one side or experience uneven braking due to improper brake pressure regulation.
• Wheel Lock-Up During Braking – One or more wheels may lock during sudden stops, especially on slippery roads.
• Brake Dragging – A faulty valve may cause a brake to remain partially applied, resulting in excessive heat, increased tire wear, or reduced fuel efficiency.
• Diagnostic Trouble Codes (DTCs) – A scan tool may detect ABS-related fault codes associated with the hydraulic control unit or ABS valve.
• Longer Stopping Distance – Braking performance may be reduced, leading to increased stopping distances, particularly in emergency situations.

About Haldex

Haldex is a global leader in the design and manufacture of advanced brake and air suspension systems for commercial vehicles. Founded in Sweden, Haldex specializes in producing reliable, high-quality components such as air compressors, brake valves, and coupling systems that enhance vehicle safety and performance. Known for innovation and durability, Haldex products are widely used in trucks, trailers, buses, and heavy machinery worldwide.