The Red Dot 71R8423 Bulbless Block-Type Expansion Valve is a plate-mount TXV engineered for heavy-duty mobile HVAC systems that require precise refrigerant control without an external sensing bulb. Bulbless block valves regulate internally, reducing components and improving durability in high-vibration off-highway equipment.
This model features a 5.5°F superheat rating for tight evaporator control and is designed for John Deere construction equipment equipped with Red Dot A/C units R-9450-3 and R-9475 series. With a 2-ton capacity, defined pressure limit, and plate/flange mounting, the 71R8423 delivers consistent performance in demanding worksite conditions.
Use the specifications and interchange numbers below to confirm the correct match before ordering.
Product Applications
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John Deere Backhoe Loader / Tractor:
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310E, 410E, 410G, 510E, 710E
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With Red Dot A/C unit R-9450-3
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John Deere Crawler Dozer:
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450H, 550H, 650H, 700H
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With Red Dot A/C units R-9475-0 and R-9475-0-24
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Red Dot Units:
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R-9475-0
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R-9475-0-24
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R-9475-3
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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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Mounting Style: Plate / Flange Mount
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Rated Capacity: 2 Ton
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Red Dot Part No.: 71R8423
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Red Dot Factory No.: RD-5-8100-0P
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Superheat Rating: 5.5°F
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Pressure Limit: 53.3 psig @ 90°F
Connections (Plate / Flange Mount):
Hose Side
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Inlet: #6 (3/8 in.) Plate (Flange) Mount
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Outlet: #12 (3/4 in.) Plate (Flange) Mount
Evaporator Side
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Inlet: #8 (1/2 in.) Plate (Flange) Mount
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Outlet: #10 (5/8 in.) Plate (Flange) Mount
OEM & Interchange Numbers
OEM Numbers:
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John Deere: RD-5-8100-0P
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Volvo: RDHRD581000P
Aftermarket / Interchange:
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Alliance: ABP N83 308371
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Red Dot Aftermarket: 71R8423
Additional Interchange References:
247-3712, 4379-RD581000P, EV01235, RDT71R8423
(Always verify plate-mount configuration, superheat rating, tonnage, and pressure limits prior to installation.)
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