The Wabco spring brake chamber, part number 9253800220 or 925-380-022-0, is a Type 20/24 combination unit designed for disc brake (ADB) applications. It delivers a 2.52-inch stroke with a maximum operating pressure of 145.0 psi and a release pressure of 73.97 psi. The push rod measures 0.59 inches with a Ball R8 thread, and the unit mounts via M16 x 1.5 bolts spaced 4.75 inches apart at a bolt length of 1.69 inches. Two 3/8"-18 NPTF ports are angled at 135 degrees. Total length is 12.97 inches. The chamber is supplied without a boot and includes an internal breather valve. Built to OE specification and operable from -40°C to +80°C. Call us to confirm proper fit for your application.
Interchanges:
- HNS38723R
- S38723R
- S38723RHTS
- TDA9253800220
- WB9253800220
Features
Type 20/24 combination spring brake chamber for disc brake (ADB) applications
Maximum operating pressure: 145.0 psi; release pressure: 73.97 psi
Stroke: 2.52 in.; push-rod length: 0.59 in. with Ball R8 thread
M16 x 1.5 mounting bolts, 4.75 in. center-to-center spacing, 1.69 in. bolt length
Dual 3/8"-18 NPTF ports at 135-degree angle; total length 12.97 in.
Built to OE specification; rated -40°C to +80°C; supplied without boot; includes internal breather valve
Tech Specs
- Brand: WABCO
- Type: 20/24 Combination Spring Brake Chamber
- Brake Type: Disc (ADB)
- Stroke: 2.52 in.
- Push-rod length: 0.59 in.
- Push-rod thread: Ball R8
- Max. operating pressure: 145.0 psi
- Release pressure: 73.97 psi
- Return-spring force: 44.96 lbf
- Bolt threads: M16 x 1.5
- Bolt length: 1.69 in.
- Distance between bolts: 4.75 in.
- Port thread 1: 3/8" - 18 NPTF
- Port thread 2: 3/8" - 18 NPTF
- Port angle: 135°
- Total length: 12.97 in.
- Temperature range: -40°C to +80°C
- Version: Without boot
- Internal breather valve: Yes
- Technical specification: OE specification
