The Wabco 9121250000 is a single-cylinder, 238cc air compressor built to OE specification for heavy-duty truck air systems. Water-cooled and lubricated directly from the engine, it operates at up to 3,000 RPM with a maximum operating pressure of 174 psi. The piston measures 3.35 in. in diameter with a 1.65 in. stroke. It mounts via a flange and uses a M18 x 1.5 crankshaft thread. Port threads include 3/4"-14 NPTF (ports 0 and 2), M10 x 1 (port 8.1), and two 1/2"-14 NPTF (port 9). The unit measures 303 x 255 x 137 mm overall and operates as a high-pressure type with an unloader. A genuine Wabco part, sold by Pro Gear and Transmission. Call us to confirm fitment for your application.
Features
Single-cylinder design, 238cc swept volume with 3.35 in. piston diameter and 1.65 in. stroke
Water-cooled with engine-supplied lubrication
Maximum operating pressure: 174 psi at up to 3,000 RPM
High-pressure type with unloader operation
Flange mounting with M18 x 1.5 crankshaft thread
Port threads: 3/4"-14 NPTF (x2), M10 x 1, and 1/2"-14 NPTF (x2)
Tech Specs
- Brand: Wabco
- Technical Specification: OE specification
- Type: Single cylinder
- Swept Volume: 238 cm3
- Calculated Volume: 10.5853 dm3
- Piston Diameter: 3.35 in.
- Piston Stroke: 1.65 in.
- Cooling: Water
- Lubrication: Supplied from engine
- Max. Operating Pressure: 174 psi
- Operating Speed: 3,000 RPM
- Type of Operation: High pressure using unloader
- Mounting: Flange
- Crankshaft Thread: M18 x 1.5
- Port Thread 0: 3/4" - 14 NPTF
- Port Thread 2: 3/4" - 14 NPTF
- Port Thread 8.1: M10 x 1
- Port Thread 9: 2x 1/2" - 14 NPTF
- Overall Size: 303 x 255 x 137 mm
