The Red Dot 71R8350 Bulbless Block Type Expansion Valve is designed for mobile HVAC systems that require a compact, rugged block-style TXV without an external sensing bulb. Bulbless valves regulate refrigerant flow internally, simplifying installation and improving durability in high-vibration environments.
This model is specifically designed for Freightliner C112, C120, and Century Class trucks (1998–2005). With female O-ring connections, a 5°F superheat rating, and a 50 psig pressure limit at 75°F, the 71R8350 delivers consistent refrigerant metering for stable evaporator performance in heavy-duty on-highway applications.
Use the specifications and interchange numbers below to confirm the correct match 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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Red Dot Part No.: 71R8350
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Red Dot Factory No.: RD-5-10334-0P
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Rated Capacity: 1½ Ton
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Superheat Rating: 5°F
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Pressure Limit: 50 psig @ 75°F
Connections:
Hose Side
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Inlet: #6 (3/8 in.) Female O-Ring
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Outlet: #10 (5/8 in.) Female O-Ring
Evaporator Side
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Inlet: #8 (1/2 in.) Female O-Ring
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Outlet: #10 (5/8 in.) Female O-Ring
Primary Application:
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Freightliner: C112, C120, Century Class (1998–2005)
OEM & Interchange Numbers
OEM Numbers:
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Freightliner: BOA80-321-00-229
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Mack: 4379-RD5103340
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Volvo: RDHRD5103340P
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Ford: D6DZ-19849-A
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Eaton: 329-474
Aftermarket / Interchange:
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Texas Truck AC: 450-6509
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AirSource / MEI: 1613, 1645
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Alliance: ABP N83 309006
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Truck Air / MEI: 12-0411
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Red Dot Aftermarket: 71R8350
Additional Interchange References:
1-3928, 1812003, 207343, 232-8560, 3949881, 4379-RD5103340P, ABP N83 308291, BOA-80-321-00-249, E-805033, EA14400, EV01045, RDHRD5103340P, RDT71R8350, ZGG13928, ZGG709010
(Always verify block configuration, O-ring sizes, superheat rating, and pressure limits prior to installation.)
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