Description
- Service Chamber, Type 20
- Standard 2.25 in. Stroke with 10.187 in. pushrod
- Air Port: 3/8 in.-18 NPT
- Threaded Pushrod; No Welded Clevis
Product Overview
Automann's Type 20 service chamber is an air-actuated brake component that converts compressed air pressure into the mechanical pushrod force needed to rotate the S-cam and apply the brake shoes against the drum. It is the service brake element used typically on S-cam drum brake steer axles of heavy-duty trucks and buses. The Type 20 designation refers to the effective diaphragm area, which determines the brake force output for a given air pressure.
Specific Features & Benefits
- Type 20 Standard 2.25 in. Stroke Design Delivers the required brake actuation force for S-cam drum brake systems on heavy-duty trucks
- 10.187 in. Pushrod Length allows for the pushrod to be cut to fit for various applications
- 3/8 in. NPT Air Port provides leak-resistant air line connection at the service chamber inlet
- Threaded Rod Without Welded Clevis Supports adjustable pushrod installation for correct stroke geometry during brake service
| Applications | Universal |
| Chamber Type | Service Chamber |
| Service Side | 20 |
| Stroke Length | 2.250" |
| Pushrod Length | 10.118" |
| Air Port Thread | 3/8"-18 NPT |
| Welded Clevis | No |
| Push Rod Thread | 5/8"-18 |
| Stroke Type | Standard |
| Stud Spacing | 4.75" |
| Clevis Type | Threaded |
| Air Port Type | Round |
| Mounting Bolt Thread | 5/8"-11 UNC |
Cross References
| Bendix | 800824 |
| Bendix | 802990 |
| Euclid | E20S |
| Mack | 19QE465RP3 |
| MGM | 1420001 |
