Description
BA-921 CAT AIR BRAKE COMPRESSOR (REMANUFACTURED – EXTERNAL OIL RETURN)
PART NUMBER(S):
Fleet Products: 5014428X (Remanufactured) 5014428 (New) | OE: 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: BA-921 (42 TEETH Drive gear) ACERT Engines (Pre-2007)
Vehicles: CAT C11 / C13 Engine Platforms Rear Flange Rotation - 30°
• Engine-driven compressor with external oil return system
• Dual-cooled (air + water) for high-temperature engine environments
• Top-mounted air inlet and side-mounted air outlet
- 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
• Includes installation gaskets and O-rings
- CAT ST-4 Discharge Safety Valve (7/8"-14 thrd) 801116
- DDC ST-4 Discharge Safety Valve (M16-1.5 thrd) 800534
- Include installation gaskets and o rings.
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, R9555014428X., T-5011432, T5011432, VMX1007105, VMX1010226, ZZ5014428X, 20R0177, 3850935, 5012464 (BA921 Detroit with external oil return line)
IMPORTANT INSTALLATION NOTES:
- Maintain minimum 1.5 gpm coolant flow.
- Ensure external oil supply line is connected for single piston applications.
- Verify air and coolant fittings are properly sealed before startup.
- Drain air reservoirs before servicing air brake components.
- Verify all fasteners are torqued to specification before returning vehicle to service.
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
