Description
K028383X – BA-921 COMPRESSOR – SIDE MOUNT
PART NUMBER(S):
Fleet Products: K028383X (Reman) | OE: K042162, K075155, K237295, K237295SC | International / Navistar: 3624499, 3624499C91, 3709920C92, 3709220C92, 2514355C1, 3624499C91, K025822N00
DESCRIPTION:
Model: BA-921 Side Mount Air Brake Compressor
Vehicles: Maxxforce G11/G13 2007-2014 INTERNATIONAL MAXXFORCE 15 (side-mount)
• Mounting: Side mount, direct to block
• Cooling: Water cooled head, air cooled crankcase
• Air Inlet: Cylinder head inlet reed valve
• Air Outlet: Integrated discharge valve plate
• Safety Valve: Built-in to prevent head overpressure
• Cooling Plate: Between cylinder head and valve plate
• Drive Gear: Mates directly with engine gear
- Cylinders: 1
- Bore x Stroke: 3.622 in x 2.126 in
- Displacement @1250 RPM: 15.8 CFM
- Flow @1800 RPM /120 PSI: 11.6 CFM
- Flow @3000 RPM /120 PSI: 16.5 CFM
- HP @1800 RPM /120 PSIG: 4.6 HP (loaded) / 0.8 HP (unloaded)
- Min Coolant Flow @Max RPM: 1.5 gpm
- Oil Pressure (min): 15 PSI
- Governor Cut-Out (min): 120 PSI
- Unloader Line: 3/16 in ID
- Temp Range: 170°F inlet / 400°F discharge
Port Sizes & Required Torque
- Cylinder Head (M8): 265–292 in-lb
- Governor Adapter (M8): 195–213 in-lb
- Rear End Cover (M10): 195–213 in-lb
- Inlet Port Fitting (M27x2): 991–1089 in-lb
- Discharge Port Fitting (M22x1.5): 814–912 in-lb
- Water Port Fitting (M18x1.5): 593–637 in-lb
- Oil Port (7/16-16 UNF): 150–170 in-lb
- Unloader Port (1/8-27 NPT): 2–3 turns from finger tight
Applications:
Used on G11/G13 2007-2014 INTERNATIONAL MAXXFORCE 15 engines requiring a side-mounted BA-921 compressor. Suitable for maintaining compressed air in air brake systems across heavy-duty vocational and over-the-road trucks.
CROSS-REFERENCE(S):
K028383X, K028383, 3624499C91, 3624499, 046255012533X, 5012533, 223637, 5011427, 5012532, 5012532X, 5012533BX, R5015424, 745, 5012533X, 745X, 50125338, 01463BA, R5012533, BEN5012533X, BEX5012533X, BW5012533X, 5012533XF, 5012533XHVG, 5012533XK020283, K020283, K020284, K020284X, K066837, R9555012533X.
A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Verify side mount orientation and direct engine block contact
✔ Confirm reed valve inlet and valve plate discharge locations
✔ Follow engine manufacturer torque spec for side mounting face
✔ Maintain clean coolant and filtered intake air for compressor longevity
✔ Use proper gaskets and inspect mating surfaces before install
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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Warranty Information
