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A-1 Truck Parts

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A-1 Truck Parts

RT4 Multi-Function Trailer Control Valve | KN26020 Haldex

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$204.14$214.10

5% off

Color

Black

Quantity

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Controls spring brake and reservoir charging for consistent trailer performance
Applies emergency parking brakes upon loss of trailer supply for enhanced safety
Trailer control port over reservoir port A for flexible installation
Meets FMVSS 121 regulations for compliance with federal standards
OEM part number N4305A for guaranteed fit and function

Summarized by Shop

Meets all FMVSS-121 trailer requirements for spring brake control and other regulations prior to Oct. 8, 1992.
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 pre

Trailer Supply: A plugged
Trailer Control: 3/8 inch
Reservoir A: 1/2 inch
PPV Closing Pressure: 70 psi
OEM Part Number: N4305A

Summarized by Shop

A-1 Truck Parts

4.7 (26)