The Midland Haldex GC3030L is a Size 30/30 Long Stroke combination spring brake chamber with square bosses, designed to fit drum brake applications across a wide range of heavy-duty trucks and trailers. Available stroke is 3.00" (76mm), with a pushrod length (J) of 10.00" from the face of the service housing. The service housing is formed from 9-gauge steel with an advanced powder coating process for corrosion and fatigue resistance. A double O-ring centerseal with plastic bearings provides positive sealing, and the world-class diaphragm compound retains flexibility down to -40°F. The Orange Alert stroke indicator gives a quick visual stroke check without tools. Also cross-referenced as 3030054 and MA15473. Call us to confirm fit for your specific axle or brake configuration.
Dimension key for GC3030L:
A - Length from mounting bracket to end of Spring Housing
B - Length of Piggyback
C - Dimension at rolled Spring Housing flange
D - Dimension at Service Clampband
J - Pushrod length from face of Service Housing
K - Distance to Clevis Pin centerline from face of Service Housing
S1 - Service Clampband position (0°)
T - Air Port position (90°)
E - Stud Spacing: 4.75" (120.7mm)
Features
Size 30/30 combination long stroke spring brake chamber with square bosses
Available stroke: 3.00" (76mm); pushrod length (J): 10.00" from face of service housing
Service housing: 9-gauge steel with powder coat finish for corrosion and fatigue resistance
Double O-ring centerseal with plastic bearings for positive sealing and extended service life
World-class diaphragm rated to -40°F for cold-weather flexibility
Orange Alert stroke indicator for quick visual brake stroke check
Replaces cross-references 3030054 and MA15473
Tech Specs
- Stroke Type: Long
- Available Stroke: 3.00" (76mm)
- A - Length from mounting bracket to end of Spring Housing: 9.9" (251mm)
- B - Length of Piggyback: 7.4" (187mm)
- C - Dimension at rolled Spring Housing flange: 8.3" (211mm)
- D - Dimension at Service Clampband: 10.2" (259mm)
- J - Pushrod Length from face of Service Housing: 10.00"
- Stud Spacing (E): 4.75" (120.7mm)
- Service Clampband position (S1): 0°
- Air Port position (T): 90°
Additional Information
Replaces part numbers 3030054 and MA15473.Dimension key for GC3030L:
A - Length from mounting bracket to end of Spring Housing
B - Length of Piggyback
C - Dimension at rolled Spring Housing flange
D - Dimension at Service Clampband
J - Pushrod length from face of Service Housing
K - Distance to Clevis Pin centerline from face of Service Housing
S1 - Service Clampband position (0°)
T - Air Port position (90°)
E - Stud Spacing: 4.75" (120.7mm)
