9111530270X | 85mm Cummins Compressor 31T (QSX/ISX Cone-gear) 3689649

CUMMINS 85MM AIR BRAKE COMPRESSOR – REMANUFACTURED

PART NUMBER(S):
Fleet Products: 9111530270 (Remanufactured) | OE: 3689649, 911 153 027 0, 3689649RX, 3689649, 9111530270, 9111530277, 9111530280

DESCRIPTION:

Model: WABCO Single-Cylinder 35 TEETH GEAR
Vehicles: Cummins ISX, QSX Engine Platforms (2000s–2020s)
• Bore Size: 85MM
• Stroke: 56 mm
• Swept Volume: 318 cm³
• Thru-Drive: 13-Tooth Spline
• Max Operating Speed: 3000 RPM
• Compressor Type: Water-cooled, engine-lubricated
• Mounting Style: Flange
• Crankshaft Thread: M20 x 1.5
• Discharge Port: M27 x 2.0 STOR
• Governor Port: M10 x 1.0 STOR
• Water Port: 3/4"–16 STOR
• CFM Output: 7
• Lubrication: From engine oil system
• Usage: OEM-style fitment for commercial highway tractors and fleet diesel units

Applications:
Designed for high-demand applications across Cummins ISX and QSX engine families. Frequently used in linehaul, vocational, construction, and on-highway trucks requiring robust air supply for braking and auxiliary systems. Direct-fit replacement compressor — engine-mounted via standard flange, water-cooled with rear thru-drive for accessory pass-through where applicable. NOTE: THIS COMPRESSOR COMES WITH 31-TEETH gear. 9121400520X has 35 Teeth Gear.

CROSS-REFERENCE(S):

3689649, 2500340001, 9111530270, 3689649RX, 911 153 027 0

A cross-reference listing means this part should be a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.

IMPORTANT INSTALLATION NOTES:

✔ Always inspect or replace the discharge line from the compressor head
✔ Use only OEM-spec STOR fittings and seals
✔ Ensure water ports are routed per vehicle cooling system requirements
✔ Follow Cummins torque specs and lubrication priming procedure
✔ Improperly routed discharge lines can cause premature failure

SOLD AS REMANUFACTURED – CORE RETURN REQUIRED
Built to OEM standards — thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.

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