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Investors Relations & Haldex information

Trailer Valve

Part no. KN26020
item status Active
Product line Haldex
RT4 Multi-Function
  • Meets all FMVSS-121 trailer requirements for spring brake control and other regulations from October 1992 to present..
  • Interchangeable with competitive units.
  • Used on trailers to control both parking and emergency brake functions.
  • Controls reservoir charging.
  • Applies emergency (parking) brakes upon loss of trailer supply (emergency) line pressure.
  • Approximate Weight 4.5 lbs.


  1. Trailer Control Port is over Reservoir Port A.
  2. Repair Kit use part number RN10JM.
Availability - If no Inventory shown, call regional CS
USA 174 standard packs in stock
Canada 40 standard packs in stock
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Cancer and
Reproductive Harm

Technical specs

Trailer Supply (A) Plugged
Trailer Supply (B) 3/8"
Trailer Control 3/8"
Reservoir (A) 1/2"
Reservoir (B) 3/8"
Delivery (4) 3/8"
PPV Closing Pressure 70 PSI
OEM Part Number N4305A
Approximate Weight 4.5 lbs.


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