71R8310 Bulbless Block Type Expansion Valve (Threaded Mounting Holes)

Description

When A/C performance drops, the expansion valve often plays a key role. The Red Dot 71R8310 is a bulbless, block-type expansion valve that helps regulate refrigerant flow and support stable evaporator performance.

This model uses threaded mounting holes (5/16″-18), so installation stays secure. It also features common female O-ring connections on both the hose side and the evaporator side. Because fit matters, you can verify the ports, rating, and pressure limit below before ordering.

Designed For These Red Dot Units

• R-9-800

• R-9-800-0

• R-9-800-0-24

• R-10004-0

Key Features

• Bulbless, block-style valve design

• Threaded mounting holes for a solid install

• Standard female O-ring ports for easier hose matching

• Rated for 1 1/2 ton systems

• Superheat rating: 5°F for controlled operation

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Product Specifications

• Part Type: Expansion Valve (Bulbless Block Type)

• Valve Type: STANDARD – BLOCK

• Red Dot Part No.: 71R8310

• Red Dot Factory No.: RD-3-7822-0P

• System Rating: 1 1/2 Ton

• Superheat Rating: 5°F

• Pressure Limit: 80 psig @ 40°F

• Mounting: Threaded mounting holes (5/16″-18)

• Hose Side Inlet: #6 (3/8″) Female O-Ring

• Hose Side Outlet: #10 (5/8″) Female O-Ring

• Evaporator Side Inlet: #8 (1/2″) Female O-Ring

• Evaporator Side Outlet: #8 (1/2″) Female O-Ring

• Listed Application: Caterpillar 325 Excavator

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Cross References

• Climatech: EA1305

• Freightliner: RDH RD3 7822 0

• Mack: 4379-RD378220

• Paccar: RD3-7822-0

• Truck Air: 12-3024A

• Volvo: RDHRD378220P

• Texas Truck A/C: 450-6508

• TruckAC+: T3510

• TTA/C: 16-7008

• Red Dot (Aftermarket): 71R8310

• Red Dot (Factory): RD-3-7822-0P

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Interchange Numbers

• 1-9276

• 12-2613A

• 12-3024A

• 1555129

• 232-8557

• 38886

• 38901

• 432-2923

• 4379-RD378220

• 4379-RD378220P

• 450-6508

• 71R8310

• EA13050

• RD3-7822-0P

• RDH RD3 7822 0

• RDHRD378220P

• RDT71R8310