Description
Automann 179.SB3030S Type 30/30 sealed spring brake chamber for heavy-duty truck and trailer air-brake axles. The standard-stroke design (2.5 in active stroke) with a 11.75 in pushrod replaces Bendix 165255 / NT3030STD120 and Haldex GC3030 in tractor and trailer drive-axle service.
Signs You Need a New Brake Chamber
- Audible air leak at the chamber clamp band or pushrod boot
- Spring brake fails to release or apply fully
- Cracked, corroded, or dented chamber housing
- Pushrod travel exceeds the adjustment limit during a slack-adjuster check
Specifications
| Manufacturer | Automann |
|---|---|
| Part Number | 179.SB3030S |
| Part Type | Type 30/30 Spring Brake Chamber, Sealed |
| Stroke | 2.5 in (standard) |
| Service Chamber | Type 30 (30 sq in diaphragm) |
| Spring Chamber | Type 30 |
| Pushrod | 5/8 in dia. x 11.75 in long |
| Mounting Studs | 5/8 in dia. x 1.5 in, 4.75 in C-C spacing |
| Welded Clevis | No |
| Condition | New |
Cross References
This part replaces or is equivalent to the following part numbers:
- Bendix: 165255, K049898, NT3030STD120
- Haldex: GC3030, GC3030P40
- Freightliner: 3030TS
- Mack: 19QE441RP1
- Meritor: MA15431, MA15445
- World American: WA3030T
Applications
This sealed Type 30/30 spring brake chamber is used on:
- Tractor drive axles with cam brakes calling for a Type 30/30 standard-stroke chamber (2.5 in stroke)
- Trailer axles with cam brakes specifying a Type 30/30 sealed chamber
Confirm stroke (standard 2.5 in vs long 3.0 in), pushrod length, and stud spacing match the chamber being replaced. Long-stroke chambers (179.SB3030SL) are not interchangeable with standard-stroke 30/30s.
