K044963 | Genuine Bendix® R-12 Air Brake Relay Valve

SKU: K044963 MPN: K044963

Reliable brake response begins with the Genuine New Bendix R-12 Air Brake Relay Valve. Part number: K044963, fitting 4200–9900 series trucks, ProStar, LoneStar, CE/FE/RE buses, and vocational or specialty applications.

$189.00
No Core Charge

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Product Description

Product Name Air Brake Relay Valve Product Name Air Brake Relay Valve
Model R-12 Model R-12
Condition New Condition New
Brand Bendix® Brand Bendix®
Part Number K044963 Part Number K044963
Vehicle Compatibility
Severe Service 5900I, 7300, 7400, 7500, 7600, 7700 Severe Service 5900I, 7300, 7400, 7500, 7600, 7700
Medium Duty 4200, 4300, 4400 Medium Duty 4200, 4300, 4400
Premium Conventional 9200, 9400, 9900 Premium Conventional 9200, 9400, 9900
Linehaul ProStar, LoneStar, Linehaul Transport Linehaul ProStar, LoneStar, Linehaul Transport
Heavy Tractors 8500, 8600 Heavy Tractors 8500, 8600
Vocational & Specialty Applications HV (Medium Duty Engines), HV (Heavy Duty Engines), Medium Vocational, Heavy Extreme, Commercial Extreme Transport, Regional Haul Vocational & Specialty Applications HV (Medium Duty Engines), HV (Heavy Duty Engines), Medium Vocational, Heavy Extreme, Commercial Extreme Transport, Regional Haul
Bus Platforms CE 200/300 Series, FE 300, RE 300, IC RE Series, 3200 Bus Chassis, 3300 Bus Chassis, FBC Bus Chassis, Cutaway Commercial Bus Bus Platforms CE 200/300 Series, FE 300, RE 300, IC RE Series, 3200 Bus Chassis, 3300 Bus Chassis, FBC Bus Chassis, Cutaway Commercial Bus
Specifications
Crack pressure 4 PSI Crack pressure 4 PSI
Body Configuration 2 SUP / 4 DEL (2H + 2V) Body Configuration 2 SUP / 4 DEL (2H + 2V)
Control / Secondary Service Port 1/4-18 NPT Control / Secondary Service Port 1/4-18 NPT
Delivery Port 1 1/2-14 NPT Delivery Port 1 1/2-14 NPT
Delivery Port 2 1/2-14 NPT Delivery Port 2 1/2-14 NPT
Delivery Port 3 3/8-18 NPT Delivery Port 3 3/8-18 NPT
Delivery Port 4 3/8-18 NPT Delivery Port 4 3/8-18 NPT
Exhaust Port Dust Shield Exhaust Port Dust Shield
Maximum Operating Temperature 200 °F (93 °C) Maximum Operating Temperature 200 °F (93 °C)
Minimum Operating Temperature -40 °F (-40 °C) Minimum Operating Temperature -40 °F (-40 °C)
Mounting M8 x 1.25-6g Stud (2x) Mounting M8 x 1.25-6g Stud (2x)
Mounting Bracket Direction Down Mounting Bracket Direction Down
Mounting Bracket Location Above Cover Mounting Bracket Location Above Cover
Supply Port 1 1/2-14 NPT Supply Port 1 1/2-14 NPT
Supply Port 2 1/2-14 NPT Supply Port 2 1/2-14 NPT
Included Mounting Bracket Included Mounting Bracket

Useful Information

Description and Purpose:

The Genuine Bendix R-12 Air Brake Relay Valve, provided in new condition and carrying Part number: K044963, regulates air pressure throughout the truck’s pneumatic system. Its 2 SUP / 4 DEL (2H + 2V) configuration ensures quick, balanced brake response for medium duty, linehaul, vocational, and bus applications, supporting reliable stopping and enhanced system safety.

Why Replacement is Important:

Worn seals or internal components may disrupt air routing and delay brake response. Timely replacement helps maintain stable pneumatic brake control.

Impact on Vehicle Performance:

A functioning relay valve supports consistent air delivery to brake chambers, helping maintain predictable braking response under load.

Manufacturer Information:

Bendix® is a global developer of braking and active safety technologies for commercial vehicles. The company supplies air brake systems, air management components, and advanced driver safety solutions widely used across trucks, buses, and vocational fleets worldwide.

Tags & Category: Air Brake Relay Valve, R-12 Relay Valve, Pneumatic Brake Valve, Truck Brake Valve, Air Pressure Valve, Brake Control Valve, Truck Air System, Relay Valve Component

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: K044963