The Fortpro BA-921 Single Cylinder Air Brake Compressor is engineered as a heavy-duty cast iron replacement for OEM part 4711302515, servicing Detroit DD13, DD15, and DD16 engine platforms. Featuring a 92 mm bore diameter, 54 mm piston stroke, 360 cm³ swept volume, and 15.8 CFM output at 1250 RPM, this 43 lb water-cooled compressor utilizes a closed room head design (EPA 2010) to deliver exceptional thermal efficiency, rapid system pressurization, and long-lasting commercial fleet reliability.
Fortpro is a trusted leader in the development and manufacturing of premium-quality truck parts designed to meet the demands of semi-trucks and heavy-duty trucks. Renowned for innovation, durability, and reliability, Fortpro products are engineered to enhance performance, safety, and efficiency across a wide range of trucking applications.
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Basic Part Information6 attributes
| Product Line | Brakes |
|---|---|
| Category Name | Air Brake Compressors |
| Part Type | Air Brake Compressor |
| Alternate Part Name | Single Cylinder Air Compressor, Engine Air Compressor |
| Model | BA-921 |
| OEM Part Number | 4711302515 |
Application/Fitment Attributes8 attributes
| Air Outlet Thread | M26 x 1.5 |
|---|---|
| Application Type | Heavy Duty Truck Air Brake System |
| Coolant Inlet Port | M18x1.5 |
| Governor Port | 1/4-18 NPT |
| Mounting Flange Location | Engine Block Side |
| Outlet Port Thread Size | M22 x 1.5 |
| Unloader Port Diameter | 1/4-18 NPT |
| Water Port Diameter | M18x1,5 |
Dimensional/Physical Attributes5 attributes
| Material | Cast Iron |
|---|---|
| Air Inlet Inside Thread | 1-3/8 in. |
| Bore Diameter | 92 mm |
| Piston Stroke | 54 mm |
| Swept Volume | 360 cm³ |
Technical/Performance Attributes6 attributes
| Block Cooling Type | Head Cooling Type |
|---|---|
| Cooling Method | water-cooled |
| Cylinder Quantity | 1 |
| Displacement (CFM at 1250 RPM) | 15.8 CFM @ 1250 RPM |
| Head Cooling Type | Closed Room Head (Detroit EPA 2010 design) |
| Lubrication Type | Supplied from engine |
Packaging / Logistics Attributes:1 attribute
| Net Weight | 43 lb. |
|---|
Intended Application
- Detroit DD13/DD15/ DD16 Engine Models
- Always compare with your OEM part number prior to purchase to confirm full compatibility.
- Bendix: K034111, K035911, K035912, K035912X, K095125
- Detroit Diesel: 4711302515, A4711302515, EA4711302515, RA4711302515
- PAI Industries: 620013EX