Replacing a Haldex brake chamber starts with the number on the can, but the number alone is not enough to confirm installation. Service chambers and spring brakes must also match the stroke, pushrod, mounting studs, ports, clevis, and available clearance.
Common Haldex brake chamber cross-references
| Haldex Part Number | Component | GBK Option | What to Verify |
|---|---|---|---|
| SC20 | Type 20 service chamber | PAT-20 | 2.25" standard stroke, pushrod length, mounting studs, ports, and clevis |
| SC24 | Type 24 service chamber | PAT-24 | 2.5" standard stroke, threaded pushrod, clevis configuration, ports, and mounting |
| SC30 / 3000001 / 53000001 | Type 30 service chamber | PAT-30 | Stroke, rod length, bolt spacing, port size, and orientation |
| GC3030 / GC3030P40 / GC3030CW | Type 30/30 regular-stroke spring brake | GT-30/30 | Regular stroke, pushrod length, clevis, ports, caging hardware, and clearance |
| GC3030L / GC3030LCW / LC3030L | Type 30/30 long-stroke spring brake | GT-30/30L PATL-30/30 |
3" long stroke, pushrod length, clevis style, sealed construction, and port configuration |
| GR1308QN | 1308Q brake shoe kit | B-1308Q | 15" x 4" brake size, 23K rating, axle position, lining, and hardware |
SC-series and GC-series numbers
Haldex SC-series numbers identify service chambers, while GC-series numbers commonly identify combination spring brake chambers. The family name helps identify the component, but it does not confirm every dimension or installation detail.
Standard stroke and long stroke are not interchangeable labels
A Type 30/30 chamber may be offered in regular-stroke and long-stroke configurations. Match the stroke shown on the original chamber and verify the pushrod and port arrangement. Do not choose a replacement solely because both products are labeled 30/30.
What to measure when the label is unreadable
- Service chamber or combination spring brake
- Chamber size
- Applied stroke or long-stroke marking
- Pushrod overall and threaded length
- Mounting-stud spacing and threads
- Air-port size, position, and orientation
- Clevis type and installation length
- Clearance around the axle, suspension, and caging bolt
Search the Haldex cross-reference page, or browse GBK brake chambers and brake shoes.
Send GBK the complete Haldex number and product measurements if the chamber configuration cannot be confirmed.
Haldex and related marks belong to their respective owners. GBK is an independent aftermarket supplier and is not affiliated with, sponsored by, or endorsed by Haldex. Part numbers are used for identification and cross-reference purposes only.
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