Description
SB3030S2518 - 30/30 STD SPRING BRAKE W/18" PUSH ROD
PART NUMBER(S):
Fleet Products: SB3030S2518
OE: 3030S2518, 3030STD2518
Automann: 170.3030S2518
DESCRIPTION:
Model: 30/30 Standard Stroke Spring Brake with 18" Push Rod
Vehicles: Freightliner, Kenworth, Peterbilt, International, Mack, Volvo, Western Star, and other commercial trucks and trailers
• Stroke: 2.5" (Standard)
• Push Rod Length: 17.25" (nominal 18", measured from mounting surface)
• Push Rod Diameter: 5/8"-18 UNF
• Chamber Height: 9.25"
• Port Size: 3/8"-18 NPT (service and emergency)
• Stud Size: 5/8"-11 UNC, Height: 1.65"
• Stud Spacing: approx. 4.75" (center-to-center)
• Mounting Style: Clamp band or stud mount
• Weight: 19.4 lb (8.8 kg)
• Diaphragm: Heavy-duty nylon-reinforced, optional neoprene
• Design Features:
• Dual-diaphragm sealed spring chamber
• Epoxy-coated components for corrosion resistance
• Corrosion Fighter Technology with breather tube system
• Polymer push-rod guides
• Integral release bolt and tamper-resistant design
• External breather tube (TR3030T/TS variants)
• SAE stroke alert compatibility
• Designed for high cycle life in severe service applications
• Compliance: FMVSS-121 and SAE J1469
Applications:
Installed on drive and trailer axles of heavy-duty commercial trucks and trailers requiring a 30/30 standard stroke chamber with extended push rod length. Ideal for configurations needing increased slack adjuster reach or axle-specific geometry.
CROSS-REFERENCE(S):
3030S2518, 3030STD2518, SB3030S2518, 170.3030S2518, 3431953, 3030TN2-2518, GC3030STD2518, R955206, K121569, E-11798, AS1141, P3030STD2518, 701074, KN31001, 90557158, 5050-3030STD18, 650-3030STD18, RA3030STD18, 7-3030STD18, SilverbackSB3030STD18, S-3030STD18
A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Block wheels securely before removing brake chamber
✔ Depressurize the air system before any service work
✔ Use OEM clamp band or mounting studs; verify fitment
✔ Torque mounting hardware to OEM spec (typically 35–40 ft-lbs)
✔ Route service and emergency lines to correct ports
✔ Push rods may require cutting or adjustment during installation
✔ Verify yoke thread compatibility; units typically ship without yoke
✔ Inspect for air leaks post-installation and validate stroke actuation
✔ Confirm matching stroke alert if applicable
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Warranty Information
