Spring Brakes - Drum
Spring Brakes have two chambers - one that acts the same as a standard brake chamber, and a second chamber that contains a very powerful mechanical spring that acts as a fail-safe should the air brake system lost air pressure. The Spring Brake also serves as a mechanical parking brake to prevent a trailer from rolling when parked on inclined surfaces.
| SIZE | ROTATION | PUSH ROD | PORTS | STROKE | DESCRIPTION | PART NO. |
| 12/16 | Figure 1 | 225mm | 3/8" | 63.5mm | Spring Brake, Push Rod Type | AB1154 |
| 16/24 | Figure 5 | 205mm | 3/8" | 63.5mm | Spring Brake, Push Rod Type | AB1141 |
| 20/24 | Figure 5 | 205mm | 3/8" | 63.5mm | Sealed back, single clamp band type | AB1162S |
| 24/24 | Figure 3 | 205mm | 3/8" | 63.5mm | Sealed back, single clamp band type | AB1159S |
| 24/30 | Figure 2 | 205mm | 3/8" | 63.5mm | Sealed back, single clamp band type | AB1156S |
| 24/30 | - | 15mm | 16mm | 57mm | European Brake Style | AB1189 |
| 30/30 | Figure 3 | 260mm | 3/8" | 63.5mm | Sealed back, single clamp band type | AB1157S |
| 36/36 | Figure 5 | 210mm | 3/8" | 76.2mm | Sealed back, single clamp band type | AB1161 |
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