The Wabco 925-49-20520 or 9254920520 is a Type 30/30 dual air brake chamber assembly engineered to OEM specification for cam-type drum brake systems. It delivers 2,697.71 lbf of output force with a 2.56 in stroke on each side, and operates across a maximum pressure range of 147.94/123.28 psi with a release pressure of 76.87 psi. The push rod uses M16 x 1.5 thread at 1.57 in length, bolt threads are also M16 x 1.5 spaced 4.75 in apart, and the port thread is M16 x 1.5 JED-152. Overall length is 11.42 in. The chamber is air-cooled, ships without a boot or yoke, and is rated for -40 degrees C to +80 degrees C service. Call us to confirm proper fit for your application.
Features
Type 30/30 dual-diaphragm air brake chamber for cam-type drum brake systems
Output force: 2,697.71 lbf at rated operating pressure
Stroke: 2.56 in / 2.56 in
Max. operating pressure: 147.94 / 123.28 psi; release pressure: 76.87 psi
Push-rod and bolt threads: M16 x 1.5; bolt spacing: 4.75 in
Temperature rating: -40 degrees C to +80 degrees C; air-cooled; no boot or yoke included
Tech Specs
- Brand: Wabco
- Type: 30/30 dual air brake chamber
- Type of operation: Cam
- Version: Without boot
- Yoke: Without
- Max. operating pressure: 147.94 / 123.28 psi
- Release pressure: 76.87 psi
- Output force: 2,697.71 lbf
- Return-spring force: 50.58 lbf
- Stroke: 2.56 / 2.56 in
- Total length: 11.42 in
- Push-rod length: 1.57 in
- Push-rod thread: M16 x 1.5
- Thread length: 1.57 in
- Bolt threads: M16 x 1.5
- Bolt length: 1.32 in
- Distance between bolts: 4.75 in
- Port thread: M16 x 1.5 JED-152
- Nominal diameter: 8.5 mm
- Wrench size: 0.94 in
- Cooling: Air
- Temperature range: -40 degrees C to +80 degrees C
- Dimensions: 230 mm x 230 mm x 450 mm
- Technical specification: OE specification
