Product Description
227400X TF-400 Air Compressor – Bendix Replacement (Pulley Drive)
The 227400X TF-400 air compressor is a belt-driven compressor designed to supply compressed air for heavy-duty truck brake systems and other pneumatic vehicle equipment. This compressor is currently in stock and ready to ship from Ace Motor Parts. It is built as a high-quality replacement designed to match or exceed the operating performance of original Bendix TF-400 compressors used in commercial truck applications.
Vehicles equipped with air brake systems depend on a constant supply of compressed air to operate safely. The compressor continuously pumps air into the vehicle’s air reservoirs where it is stored and used for service brakes, parking brakes, and other air-powered components. When the compressor operates correctly, the braking system maintains stable air pressure and dependable response during vehicle operation.
The TF-400 design is known for its compact size and reliable airflow output. This particular configuration is commonly used on vehicles equipped with a belt-driven compressor system and a water-cooled housing. These compressors are often found on heavy trucks, vocational vehicles, and older fleet equipment where a small but dependable air supply compressor is required.
TF-400 Compressor Construction
The TF-400 compressor operates using a two-cylinder reciprocating piston mechanism that compresses air during each piston stroke. The design uses a single-stage compression cycle which allows the compressor to deliver consistent airflow with relatively low horsepower demand from the engine.
At a typical operating speed of 1250 RPM, the compressor produces approximately 7.25 cubic feet of compressed air per minute. This airflow output allows the system to recharge air reservoirs following brake applications and maintain system pressure under normal driving conditions.
The compressor is driven by a pulley connected to the engine through a belt system. Internal moving components are lubricated through the engine’s oil supply while the compressor housing uses a water-cooled design to help regulate operating temperatures during continuous duty operation.
To maintain correct system pressure, the compressor works together with the vehicle’s governor and unloading mechanism. When air pressure reaches the upper limit of the system, the compressor unloads and temporarily stops compressing air. As pressure drops during braking, the compressor resumes pumping to restore the air supply.
Key Features
- Direct replacement for Bendix TF-400 compressors
- Compact two-cylinder reciprocating piston compressor
- Belt-driven pulley configuration
- Approximately 7.25 CFM airflow output at 1250 RPM
- Water-cooled compressor housing
- 4-hole base mount design
- Left-side air inlet and outlet configuration (viewed from rear)
- Designed for heavy truck and commercial vehicle air brake systems
- In stock and ready to ship from Ace Motor Parts
Technical Specifications
| Part Number | 227400X |
| Compressor Model | TF-400 |
| Drive Type | Pulley Driven (Belt Drive) |
| Mounting Style | 4-Hole Base Mount |
| Cylinders | 2 |
| Bore | 2.0625 in |
| Stroke | 1.5 in |
| Air Output | 7.25 CFM @ 1250 RPM |
| Maximum Speed | 3000 RPM (Water Cooled) |
| Horsepower Requirement | 1.2 HP @ 1250 RPM |
| Cooling | Water Cooled |
| Minimum Unload Pressure | 60 PSI |
| Maximum Inlet Temperature | 250°F |
| Maximum Discharge Temperature | 400°F |
| Air Inlet Port | Left (Viewed from Rear) |
| Air Outlet Port | Left (Viewed from Rear) |
| Discharge Type | Flange |
| Oil Capacity | 0.53 qt |
| Weight | 31 lbs |
Typical Applications
The 227400X TF-400 compressor is commonly installed in commercial vehicles equipped with belt-driven air compressors and water-cooled systems. These compressors are frequently used on heavy trucks, older fleet vehicles, and specialized equipment requiring compact air compressors for brake system operation.
Typical applications include:
- Heavy trucks and semi-tractors
- Vocational fleet vehicles
- Commercial service trucks
- Specialty equipment requiring compact belt-driven compressors
OEM Cross Reference Numbers
| 226085 | 226433 | 226688 | 226716 |
| 226760 | 226984 | 227220 | 227227 |
| 227400 | 227405 | 228503 | 228596 |
| 228827 | 276360 | 277055 | 277082 |
| 277130 | 277395 | 278555 | 279349 |
| 281786 | 281879 | 282462 |
Additional Industry Interchange
| 227400X | KN7041X | 107866 |
| 228083TP | TF-400 |
A cross-reference listing indicates this compressor may replace the part numbers shown. Always verify mounting configuration, port orientation, and application compatibility before installation.
Role of the Compressor in Air Brake Systems
Air compressors are critical to the operation of commercial vehicle braking systems. They continuously generate compressed air that is stored in system reservoirs and used to apply braking force whenever the driver presses the brake pedal.
If a compressor becomes worn or loses efficiency, the air system may struggle to build pressure quickly enough. Replacing a worn compressor restores proper airflow and helps maintain safe braking performance across commercial fleet applications.
Browse our complete selection of air brake compressors or explore our inventory of surplus air brake compressors for heavy duty trucks.
