HAAL430666 | Genuine Haldex® ABS Valve, 4 Port, 12V, Spring Brake Priority

• 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

• 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

• 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.

• 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.