71R8500 Red Dot White GM CCOT Orifice Tube – .071 in. Orifice

The Red Dot 71R8500 Orifice Tube is a white GM CCOT-style fixed orifice tube designed for use in cycling clutch orifice tube (CCOT) air conditioning systems. This component meters refrigerant flow into the evaporator and plays a critical role in maintaining proper system pressure and cooling performance.

Commonly referenced under GM OE 3033879 / 3033919 and IHC 1676822-C91, this orifice tube is used in a wide range of on-road and off-highway HVAC systems. The white color coding indicates a calibrated orifice size suited for specific GM-style CCOT applications.

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

Product Specifications

• Part Type: Fixed Orifice Tube

• System Type: GM CCOT (Cycling Clutch Orifice Tube)

• Color: White

• Red Dot Part No.: 71R8500

• Red Dot Factory No.: RD-5-4919-0P / RD-5-4919-1P

Dimensions

• Length: 3.485″

• Outside Diameter (O.D.): .386″

• Orifice Size: .071″

OEM References

• GM: 3033879, 3033919

• IHC / Navistar: 1676822-C91

Cross References

• Texas Truck A/C: 450-7000, 450-7000A

• AirSource / MEI: 1650

• Alliance: ABP N83 308007, ABP N83 308049

• Bergstrom: 525712

• Climatech: EC1005, EC1010

• CoolCab: 932202

• CoolStar / MEI: 530-1000

• Delco: 15-5151

• DTAC: 04-15014

• Euclid: E-805047

• Fleetrite: ZGG13867, ZGG16964, ZGG19409

• Four Seasons: 38623

• GM: 3033879

• Isuzu: 8-03033-879-0

• John Deere: RE24620

• Kysor: 1810003

• Motivair: 23377, 24473

• Murray: 207311, 207311B

• Navistar: 1678822-C91

• Omega: 31-50001

• Primatech: PTAC1650

• Santech: MT0097

• Sunair: MC-550

• Trans Air: 210057

• Truck Air / MEI: 12-0211

• TruckAC+: T4933

• Volvo: 3949271

Interchange Numbers

04-15014, 1-3867, 1-6964, 12-0211, 12-2011,
15-5151, 15-5754, 1650, 1676822C91,
1810003, 207311, 3033879, 3033919,
31-50001, 38623, 3949271, 404153,
4379-RD549190P, 450-7000, 525712, 530-1000,
71R8500, ABP N83 308007, ABP N83 308049,
E-805047, EC10050, EC10100, EV03000, MC-550,
RDHRD549190P, ZGG13867, ZGG16964, ZGG19409

(Always verify system type, color coding, and orifice size prior to installation.)