Description
5014428X BA-921 CAT AIR BRAKE COMPRESSOR – REMANUFACTURED
PART NUMBER(S):
Fleet Products: 5014428X (Remanufactured), 5014428N (New) | Replaces OE: Bendix: 5012464, 5014236, 5014428, 5014428N, K056647, 5012459, 5014235, 5014427, K048940, K066837, 5012510, 5014180, 5014402, 5014402X, K048939, K066831, 5011441, 5014177, 5014401, K048938, K066811, 801465, 801798, 801826, K056649, 5011441X, 5013058X, 5014401X, 5014427X, K056647X, 5010803, 5010803X, 5010804, 5010805, 5010895, 5014489 | CAT: 223-3636, 253-1736, 255-4160, 20R-0176, 0R-1623, 353-7136, 385-0936, 254-3853, 2N-1287, 20R-0177, 10R-7437, 1R-1808, 353-7135, 385-0935
DESCRIPTION:
Model: Bendix BA-921 CAT Air Brake Compressor with External Oil Return
Vehicles: CAT C11 / C13 ACERT pre-2007 engine platforms with 30° rear flange rotation
• Drive Gear: 42 teeth
• Rear Flange Rotation: 30°
• External Oil Return: Yes
• Air Inlet: Top
• Air Outlet: Side
• Mounting Type: Flange mount
• Drive: Engine driven
• Cooling Method: Water and air cooled
• Cylinders: 1
• Bore × Stroke: 3.622 in × 2.126 in
• Rated Displacement: 15.8 CFM @ 1250 RPM
• Air Flow: 11.6 CFM @ 1800 RPM / 120 PSI; 16.5 CFM @ 3000 RPM / 120 PSI
• Power Requirement: 4.6 HP loaded / 0.8 HP unloaded @ 1800 RPM / 120 PSIG
• Minimum Coolant Flow: 1.5 GPM @ maximum RPM
• Minimum Oil Pressure: 15 PSI
• Minimum Governor Cut-Out Pressure: 120 PSI
• Unloader Line: 3/16 in I.D.
• Temperature Range: 170°F inlet / 400°F discharge
• Inlet Port Fitting: M27 × 2
• Discharge Port Fitting: M22 × 1.5
• Water Port Fitting: M18 × 1.5
• Oil Port: 7/16-16 UNF
• Unloader Port: 1/8-27 NPT
• Compatible ST-4 Safety Valve: 801116, 800534
• Includes: Installation gaskets and O-rings
Applications:
Used on CAT C11 and C13 ACERT pre-2007 engine applications requiring a BA-921 42-tooth compressor with external oil return and 30° rear flange rotation. The compressor supplies compressed air for the vehicle air brake system and is typically replaced when air output is reduced, leakage is present, or internal compressor wear affects system recharge.
CROSS-REFERENCE(S):
046255014428X, 0R1623, 165-179-9213, 1651799213, 170.AC5014428, 170AC5014428, 222-2900, 2222900, 2233636, 2531736, 2543853, 2554160, 2N1287, 3537136, 3850936, 5.0144E 006, 5014428BXR, 5396-5014428X, 701175AT, 767653327884, BAR5014428, BC1-25555, BW5014428, BWR5014428, BX5014428X, EBN5014428X, HVG5014428X, MID5014428X, R9555014428X, T-5011432, T5011432, VMX1007105, VMX1010226, ZZ5014428X, 20R0177, 3850935
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:
✔ Maintain minimum 1.5 GPM coolant flow
✔ Ensure the external oil return line is connected before startup
✔ Verify air, coolant and oil fittings are properly sealed before startup
✔ Drain all air reservoirs before servicing air brake components
✔ Verify all fasteners are torqued to specification before returning vehicle to service
✔ Torque cylinder head fasteners to 265–292 in-lb
✔ Torque governor adapter fasteners to 195–213 in-lb
✔ Torque rear end cover fasteners to 195–213 in-lb
✔ Torque inlet port fitting (M27 × 2) to 991–1089 in-lb
✔ Torque discharge port fitting (M22 × 1.5) to 814–912 in-lb
✔ Torque water port fitting (M18 × 1.5) to 593–637 in-lb
✔ Torque oil port (7/16-16 UNF) to 150–170 in-lb
✔ Tighten unloader port (1/8-27 NPT) 2–3 turns from finger tight
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
