The Wabco air brake chamber 9253921080 or 925-392-108-0 is a Type 30/30 combination spring brake unit designed for cam-operated drum brake systems. It carries a maximum operating pressure of 145.0 psi and a release pressure of 66.72 psi, with a stroke of 2.99 in. and a push-rod length of 3.55 in. The total length measures 14.29 in., bolt spacing is 4.75 in., and bolt threads are 5/8"-11 UNC. Two 3/8"-18 NPTF ports are provided at a 20-degree angle. The chamber is rated for -40°C to +80°C operation and is supplied without a boot. Call us to confirm proper fit for your application.
Interchanges:
- WAB9253921080
Features
Type 30/30 combination spring brake chamber for cam-operated drum brake systems
Maximum operating pressure 145.0 psi; release pressure 66.72 psi
Stroke 2.99 in.; push-rod length 3.55 in.; total length 14.29 in.
Bolt threads 5/8"-11 UNC; distance between bolts 4.75 in.
Two 3/8"-18 NPTF ports positioned at a 20-degree angle
Operating temperature range -40°C to +80°C; supplied without boot
Tech Specs
- Brand: WABCO
- Part Number: 9253921080 or 925-392-108-0
- Type: 30/30 Combination Spring Brake
- Type of Operation: Cam
- Brake Type: Drum
- Stroke: 2.99 in.
- Push-Rod Length: 3.55 in.
- Total Length: 14.29 in.
- Max. Operating Pressure: 145.0 psi
- Release Pressure: 66.72 psi
- Bolt Threads: 5/8"-11 UNC
- Bolt Length: 1.50 in.
- Distance Between Bolts: 4.75 in.
- Clevis Pin: 0.51 in.
- Port 1 Thread: 3/8"-18 NPTF
- Port 2 Thread: 3/8"-18 NPTF
- Port Angle: 20 degrees
- Temperature Range: -40°C to +80°C
- Version: Without Boot
- Technical Specification: OE Specification
