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The MGM Brakes Combination Air Brake Chamber restores spring and service brake function in one assembled unit. That combination layout matters when the chamber has to handle both parking and service-side braking duties without turning the repair into a two-piece workaround. A welded yoke design keeps the pushrod connection more secure under heavy use, which is the kind of detail that helps a chamber feel like the right replacement for a commercial brake system. Once bolted in, the MGM Brakes MJS3030ET951 chamber puts the axle end back on steadier footing for braking duty.
| Breather Tube | Breather Tube |
| Chamber Type | Piston Brake |
| Diaphragm Diameter | Rubber IN |
| Mounting Bolt Length | 1.540 IN |
| Mounting Bolt Thread | 5/8-11 |
| Port Size | 3/8-18 NPTF |
| Spring Size | 30 |
| Service Size | 30 |
| Stroke | 3.00 IN |
| Welded Yoke | Welded Yoke |
| UNIT | Aftermarket |
| Diaphragm | Rubber |
| Push Rod Length - with yoke | 2.25 |
| Rod Diameter | 5/8 |
| Country of Origin (Primary) | US |
| 2 | |
| VMRS Code | 013004000 |
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