Description
BA-921 CAT AIR BRAKE COMPRESSOR (REMANUFACTURED)
PART NUMBER(S):
Fleet Products: 5012533X (Remanufactured) 5012533N (New) | OE: 10R9375, 0R1624, 20R0178, 10R9375, 10R9375, 10R9375 (BA-921 CAT ), 20R0176, 20R0178, 223-3637, 223-3637 | BA-921 CAT, 5011427, 5012531, 5012532, 5012533N, 801463, K020284, K048943, K066838, 0R1624, R9555012533X, 385-0935
DESCRIPTION:
Model: BA-921
Vehicles: Caterpillar C15 / C18 Engine Platforms
• Mounts directly to C15/C18 CAT engines
• Engine-driven, dual-cooled (air + water) design
• Top-mounted air inlet
• Side-mounted air outlet
• Built for sustained air output in severe-duty on-highway and off-road applications
- Bendix ST-4 safety valve 801116 (7/8"-14) not included
- Include installation gaskets and orings.
Applications:
Used extensively in Caterpillar-powered heavy trucks, mining haulers, construction vehicles, and other off-highway commercial equipment requiring constant air supply for brake and auxiliary pneumatic systems.
CROSS-REFERENCE(S):
046255012533X, 0R1624, 0R-1624, 10R9375, 10R-9375, 1651799212, 165-179-9212, 20R0178, 20R-0178, 2233637, 223-3637, 3049991, 304-9991, 3537137, 353-7137, 3850937, 385-0937, 5011427, 5011427X, 5012531X, 5012532, 5012532X, 5012533, 5012533B1, 5012533BXR, 5012533C, 5012533X, 5012533X-C, 702376AT, 7455012533, 745-5012533, 7455012533X, 745-5012533X, 745X5012533, 745X-5012533, 801463, BAR5012533, BDR5012533X, BEN5012533X, BEX5012533X, BW 5012533, BW 5012533X, BW R5012533, BW R5012533/CR, BW5012533, BW5012533X, BWR 50125333X, BWX5012533X, BX 5012533X, BX5012533, BX5012533X, BXC-5012533X, EX5012533X, HVG5012533X, K020283, K020284, K020285, K048941, K048942, K048943, K066812, K066832, K066838, R9555012533X, ROY-5012533X, 10R9375, 0R1624, 20R0178, 10R9375, 10R9375, 10R9375 (BA-921 CAT ), 20R0176, 20R0178, 223-3637, 223-3637 | BA-921 CAT, 5011427, 5012531, 5012532, 5012533N, 801463, K020284, K048943, K066838, 0R1624, R9555012533X
A cross-reference listing means this part should be a suitable replacement for the part numbers listed. Please confirm all dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Always inspect or replace discharge line from compressor head
✔ Avoid sharp bends, restrictions, or damaged air lines
✔ Follow CAT or OE torque specs and gasket guidelines for proper sealing
✔ Confirm compatibility with specific C15/C18 engine casting and mounting
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
