Product Description
9111539450X Air Compressor - WABCO Replacement
The 9111539450X air compressor is a heavy-duty replacement for commercial truck and bus air brake systems that use this WABCO-style compressor. This unit is currently in stock and ready for shipment from Ace Motor Parts. In normal operation, the compressor supplies the air pressure needed for service brakes, parking brakes, and other vehicle systems that depend on compressed air.
This model uses a flange-mount design with water cooling and engine-fed lubrication, making it well suited for demanding vehicle applications where steady operating temperature and reliable airflow are important. The compressor is built for heavy-duty service and is designed to maintain the pressure needed for proper brake system function under everyday working conditions.
With a maximum operating pressure of approximately 145 PSI and operating speeds up to 3000 RPM, this compressor is intended for applications that require dependable air delivery and durable construction. The unit also features a piston diameter of approximately 3.35 inches and a piston stroke of about 2.20 inches, giving it the internal capacity needed for commercial air system performance.
9111539450X Air Compressor Overview
The 9111539450X compressor is a direct replacement choice for select heavy-duty vehicle air systems using this WABCO configuration. Its design incorporates a compact but robust housing with a swept volume of approximately 318 cm³, helping provide consistent output for truck and bus brake systems.
This compressor is also sized for practical installation in commercial applications, with overall dimensions of approximately 275 x 154 x 303 mm. At roughly 39.9 lbs, it is substantial enough for heavy-duty operation while still fitting within the normal installation space for this style of compressor.
Key Features
- Replacement for select WABCO air compressor applications
- Designed for heavy-duty truck and bus air brake systems
- Water-cooled housing for temperature control during operation
- Engine-supplied lubrication for compatible applications
- Flange-mount compressor design
- Built for dependable compressed air delivery in commercial service
Technical Specifications
| Part Number | 9111539450X |
| Product Type | Air Compressor |
| Mounting Style | Flange Mount |
| Cooling Method | Water Cooled |
| Lubrication | Engine Supplied |
| Maximum Operating Pressure | 145 PSI |
| Maximum Operating Speed | 3000 RPM |
| Piston Diameter | 3.35 in |
| Piston Stroke | 2.20 in |
| Swept Volume | 318 cm³ |
| Temperature Range | -40°C to +80°C |
| Dimensions | 275 x 154 x 303 mm |
| Weight | 39.9 lbs |
| Typical Use | Commercial truck and bus air brake systems |
9111539450X Air Compressor Cross Reference
The 9111539450X air compressor is also referenced under the following part numbers:
- 2888799
- 4964074
- 4998124
Always verify compressor mounting, port configuration, and application before ordering.
Why Compressor Performance Matters
The air compressor is one of the most important parts of a commercial vehicle’s air system. It must build and maintain enough pressure for reliable brake operation, and it also supports other air-operated vehicle functions in many heavy-duty applications.
If a compressor begins to wear internally, the vehicle may experience slow pressure build-up, inconsistent system performance, or additional strain on related air system components. Replacing a worn compressor can help restore normal operation and improve overall air system reliability.
Ace Motor Parts Tip
When replacing an air compressor, it is smart to inspect related components such as the air governor, air dryer, discharge line, and fittings. Servicing those parts at the same time can help reduce contamination and support longer service life for the replacement compressor.
Browse our full selection of air brake compressors or view our inventory of surplus air brake compressors for heavy duty trucks.
