Description
PB3030S300K - TYPE 30 LONG STROKE PIGGYBACK KIT W/CLAMP & DIAPHRAGM
PART NUMBER(S):
Fleet Products: PB3030S300K | OE: 3430008, NT3030ELSKIT, GP3030LK | Automann: 170.PB3030S300K
DESCRIPTION:
Model: Type 30 Long Stroke Piggyback Kit
Vehicles: Freightliner, Kenworth, Peterbilt, International, Mack, Volvo, Western Star, and compatible trailers
• Chamber Size: 30/30 (Type 30 spring and Type 30 service)
• Stroke: 3" long stroke
• Push Rod Length: Typically 8" (verify per application)
• Port Type: 3/8"-18 NPT (service and emergency ports)
• Chamber Height: Approx. 8.2"–8.5"
• Mounting Style: Clamp band
• Housing Material: Epoxy-coated reinforced steel; corrosion-resistant
• Included Components: Diaphragm, clamp band, hardware, push rod
• System Design: Dual-diaphragm sealed spring chamber, tamper-resistant design
• Cold-Temp Capability: Diaphragm rated to -40°F/C
• Compliance: Meets FMVSS-121 and SAE J1469 standards
• External Coating: Zinc-plated steel for corrosion resistance
• Indicators: Stroke indicator included on push rod
Applications:
Built for use in drive and trailer axle air brake systems on heavy-duty commercial vehicles requiring long-stroke chambers. Designed to replace the spring side of 30/30 brake assemblies while increasing chamber travel for improved brake force at slack adjuster limits.
CROSS-REFERENCE(S):
PB3030S300K, 3430008, 3230008, NT3030ELSKIT, GP3030LK, ANLGP3030LK, 3030PBKLS, 3030PBKLS3030PBLBPS3030KLS, OTR3030PBKLS, 3030PBKLS, ABPN42A30PBK3D, SB83030, 3030SN3K, UP3030PBKLS, FLTK3030LB24A 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 and fully exhaust air pressure before service
✔ Use caging tool to compress spring before removal
✔ Reuse original clamp or install included band with proper torque (35–40 ft-lbs typical)
✔ Verify push rod length and chamber alignment during install
✔ Confirm port orientation and 3/8" NPT thread match
✔ Test brake system for air leaks and stroke compliance post-install
✔ Cold-rated diaphragm (-40°F) must be oriented properly
✔ Follow OEM torque and fitment guidelines
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Warranty Information
