Description
TWIN CYLINDER AIR COMPRESSOR – CUMMINS B SERIES / WABCO SS636
PART NUMBER(S):
Fleet Products: 9115150090X (Remanufactured) | Replaces OE: Cummins: 5342750, 5342750RX, 4991968, 4991969, 5268437, 5268438, 5286962, 5286963, 5344319 | WABCO: 9115150090, 4972994RX, 4972994, 5657736, 9115150123, 911 515 012 3, 3103405, 3103405RX, 3099666
DESCRIPTION:
Model: WABCO SS636 Twin Cylinder Air Compressor
Vehicles: Cummins ISB/QSB 6.7L and 5.9L engines, truck, bus, and vocational chassis applications
• Type: Twin cylinder
• Cooling: Water cooled
• Operating speed: 3000 rpm
• Maximum operating pressure: 10.0 bar
• Piston diameter: 85.0 mm
• Piston stroke: 56 mm
• Swept volume: 636 cm³
• Lubrication: Supplied from engine
• Mounting: Flange mount
• Crankshaft thread: M20 x 1.5
• Inlet port diameter: 25 mm
• Discharge port: M27 x 2.0
• Unloader/control port: M10 x 1.0
• Cooling port diameter: 10 mm
• Oil supply/return ports: 3/4"-16 UNF-2B
• Temperature range: -30°C to +90°C
• Service note: Twin cylinder version of 9111530140X
Applications: Designed for Cummins ISB and QSB B-Series engine platforms requiring a WABCO SS636 twin-cylinder compressor. Suitable for medium-duty trucks, buses, and vocational chassis using compatible brake, suspension, and auxiliary air systems. Verify all ports, mounting, and drive configuration before installation.
CROSS-REFERENCE(S):
5342750, 5342750RX, 5342750NX, 5342750PX, 1650792028, 4991968, 4991969, 5268437, 5268438, 5286962, 5286963, 5344319, 9115150090, 9115150090X, 9115150097, 707535AT, P124A082T, S4614OEM, 3103405, 3099666, 4972994, 67A344R
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:
✔ Prime lubrication passages before installation to prevent dry start-up wear
✔ Flush and inspect cooling and air lines for debris or oil carryover before mounting the compressor
✔ Confirm flange alignment and torque fasteners to OEM specifications to avoid premature bearing or shaft damage
✔ After installation, run the engine to temperature and inspect for coolant, oil, and air leaks under load
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
