Description
9125400040X 85MM TWIN CYLINDER AIR BRAKE COMPRESSOR ISX 270 FLANGE
PART NUMBER(S):
Fleet Products: 9125400040X (Remanufactured) | Replaces OE: Cummins: 3689769, 3689770, 3689770CUM, 3689770RX, 700085AT, 700086AT | WABCO: 9125400040, 9125400047, 9125400050, 912540040
DESCRIPTION:
Model: WABCO/Cummins Twin Cylinder Air Compressor, ISX 270 Flange Mount
Vehicles: Cummins ISX, QSX, X15-400, X15-500, X15-605 series engines with 270 mm compressor face
• Piston diameter: 85.0 mm
• Stroke: 56 mm
• Displacement: 636 cm³
• Configuration: Twin cylinder
• Cooling method: Water-cooled
• Operating speed: Up to 3,000 RPM
• Maximum operating pressure: 10.0 bar / 145 psi
• Crankshaft thread: M20 x 1.5
• Lubrication: Supplied by engine
• Port threads: 31.8 mm, M27 x 2.0, M10 x 1.0, 8 mm, M18 x 1.5 (x3)
• Mounting: ISX 270 flange
Applications: Engineered for Cummins ISX platforms requiring the ISX 270 flange compressor configuration. Suitable for commercial fleet, long-haul trucking, and vocational heavy-duty applications requiring a water-cooled twin-cylinder air brake compressor. Verify flange face, crankshaft thread, and port routing before installation.
CROSS-REFERENCE(S):
09254073076, 3686475, 3686476, 3686476RX, 3689770, 3689770CUM, 3689770RX, 912540040, A2C53354791Z
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ For use only with Cummins ISX engines using ISX 270 flange
✔ Flush coolant and air lines before installation
✔ Confirm crankshaft thread compatibility M20 x 1.5 before installation
✔ Match all port sizes and routing to vehicle specifications
✔ Torque all ports and fasteners to OE standards
SOLD AS REMANUFACTURED – CORE RETURN REQUIRED
Built to OEM standards — thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
Warranty Information
