71R8420 Red Dot Bulbless Block Type Expansion Valve – Plate Mount, 53.5 PSIG @ 90°F

Description

The Red Dot 71R8420 Bulbless Block Type Expansion Valve is a plate-mount TXV designed for mobile HVAC systems that require direct flange mounting rather than hose or O-ring fittings. Bulbless block valves regulate refrigerant flow internally, reducing external components while improving durability and consistency in high-vibration, high-duty applications.

This model is commonly used in Kenworth, Peterbilt, Ford CF Cargo, and Volvo/White GMC VN-series sleeper applications. With a 53.5 psig pressure limit at 90°F, an 8.5°F superheat rating, and a plate-mount connection layout, the 71R8420 provides stable evaporator control in long-run sleeper and cab systems.

Use the specifications and interchange numbers below to confirm the correct match before ordering.

---

On-Road Applications

• Ford:

  • CF Cargo Series (1992–1994)

• Kenworth:

  • T-2000 Sleeper (1996–2010)

• Peterbilt:

  • 387 Sleeper Units (1999–2011)

• Volvo / White GMC:

  • VN Series 420, 610, 770 (1996–2001)

---

Product Specifications

• Part Type: A/C Expansion Valve

• Valve Style: Bulbless Block Type

• Mounting Style: Plate / Flange Mount

• Red Dot Part No.: 71R8420

• Red Dot Factory No.: RD-5-7179-0P

• Superheat Rating: 8.5°F

• Pressure Limit: 53.5 psig @ 90°F

Connections (Plate / Flange Mount):

Hose Side

• Inlet: 6 Plate (Flange) Mount

• Outlet: 10 Plate (Flange) Mount

Evaporator Side

• Inlet: 8 Plate (Flange) Mount

• Outlet: 8 Plate (Flange) Mount

---

OEM & Interchange Numbers

OEM Numbers:

• Mack: 4379-RD571790

• PACCAR: 540056BSM, F90-6000

• Eaton: 540056

Aftermarket / Interchange:

• Texas Truck AC: 450-6554

• AirSource / MEI: 1648, 1667

• Alliance: ABP N83 308151, ABP N83 308906

• Truck Air: 12-0804, 12-3029A

• Red Dot Aftermarket: 71R8420

Additional Interchange References:
1899031, 232-8567, 3688242C2, 3946673, 3949277, 4379-RD571790P, 520-1220, 549707BSM, 929-498, EV01220, RDHRD571790P, RDT71R8420, ZGG709021

(Always verify plate-mount configuration, superheat rating, and pressure limit prior to installation.)