The Red Dot 71R8460 Bulbless Block-Type Expansion Valve is a 2-ton, high-capacity TXV designed for heavy-duty mobile A/C systems that require precise refrigerant metering without an external sensing bulb. Its bulbless block construction improves durability in high-vibration environments while simplifying installation and service.
This valve features a built-in Schrader service port, making system diagnostics and pressure checks easier during installation and maintenance. With female O-ring fittings on all ports, an 8.5°F superheat rating, and a 53.5 psig pressure limit at 90°F, the 71R8460 is well suited for on-road and off-road HVAC systems where consistent cooling performance and reliability are critical.
Use the specifications and interchange numbers below to confirm proper fitment before ordering.
Product Specifications
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Part Type: A/C Expansion Valve
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Valve Style: Bulbless Block-Type
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Capacity: 2 Ton (Hi-Cap)
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Service Port: Schrader Port
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Red Dot Part No.: 71R8460
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Red Dot Factory No.: RD-5-14086-0P
OEM Reference:
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Paccar Part No.: 540446BSM
Connections (Female O-Ring):
Hose Side
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Inlet: #6 (3⁄8″) Female O-Ring
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Outlet: #10 (5⁄8″) Female O-Ring
Evaporator Side
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Inlet: #8 (1⁄2″) Female O-Ring
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Outlet: #8 (1⁄2″) Female O-Ring
Performance Ratings
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Superheat Rating: 8.5°F
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Pressure Limit: 53.5 psig @ 90°F
Mounting
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Mounting Style: Bulbless Block
Interchange Numbers
12-2015A, 1644, 1644G, 1814002, 1814007, 31-31214, 329-491, 4379-RD5140860P, 520-1025, 540446BSM, 71R8460, 93-145, ABP N83 308263, EA1460, EA15000, RDHRD5140860P, RDT71R8460
(Verify tonnage, Schrader port requirement, and O-ring port sizes prior to installation.)
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