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5014428N | *New* BA-921 CAT 42T Compressor External Line (C11/C13 ACERT)

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Part Number:
5014428N
Condition:
Brand New
Availability:
In Stock
Weight:
48.00 LBS

Description

5014428N BA-921 CAT AIR BRAKE COMPRESSOR – NEW


PART NUMBER(S):

Fleet Products: 5014428N (New), 5014428X (Remanufactured) | Replaces OE: CAT: 0R-1623, 0R-1624, 10R-1437, 191-6521, 223-3636, 255-4160, 20R-0176, 20R-0177, 353-7135, 385-0935, 385-0936 | Bendix: 5010803, 5010806, 5011427, 5011441, 5012532, 5014428, 5014482


DESCRIPTION:

Model: Yumak BA-921 CAT Air Brake Compressor with External Oil Line
Vehicles: CAT C11 / C13 ACERT pre-2007 engine platforms with 30° rear flange rotation

• Drive Gear: 42 teeth
• Rear Flange Rotation: 30°
• External Oil Line: 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 line 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):

0R1623, 3850936, 5014401, 5014402, 5014427, 801826, K056647, BXR107506, BXR107506X, BXX107506X, CC107506, E-BN107506X, EBN107506X, EL13040, EL13040X, EUEBN107506X, F5012533X, FLTBC106, 42018134, 42032285, HVG107506X, HVG5012533X, HVG5014428X, K020283, K020284, K020284X, K046146, K056647BXR, K056647X, K056649, MB107506X, MI107506X, MSBX107506X, N13AC, OR107506, OR1624, P107506, R107000, R107506, R107506X, R107974, R108583, R955107506X, R9555012533X, R9555014428X, R955EL13040X, R955K056647X, S13753, WBW-107506X, WBW107506X, ZZ107506X

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 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

Warranty Information

We provide a warranty on all new and remanufactured parts for 12 months, 160,000 km (100,000 miles), or 3,600 hours - whichever comes first, with off-highway components covered for 90 days. Defective products must be returned within 30 days of discovery for inspection. The warranty covers repair or replacement of defective parts and excludes issues caused by improper installation, maintenance, or service. Visit our website’s Warranty section for complete details and claim instructions.

Reviews

1 Review

  • 5
    Solid new BA921 compressor for my CAT C15

    Posted by Dave Carlson on 14th Nov 2025

    “I put this 5014428N BA-921 compressor on my C15 after the old one started getting lazy and building air slow. Install was straightforward – flange lined up right, ports were where they should be, and all the gaskets and o-rings were there so I wasn’t chasing extras.