Product Description
TYPE 30 MAXIBRAKE – I SERIES UNIVERSAL SPRING BRAKE
PART NUMBER(S):
Fleet Products: M3075DIO | OE: KSM3075KC-800NN, MA15777 | Automann: N/A
DESCRIPTION:
Model: Type 30 MAXIBRAKE® I Series Spring Brake
Vehicles: Off-road heavy equipment trailers using Type 30 air brake systems
• Spring Chamber Type: Type 30 (30 in² diaphragm area)
• Push Rod Length: Universal 8"
• Push Rod Thread: 5/8"-18 UNF (typical for Type 30, confirm if application-specific)
• Ports: Dual 3/8"-18 NPTF threads (service and emergency)
• Mounting Stud Spacing: 4.75" center-to-center
• Stud Thread: 5/8"-11 UNC
• Max Air Pressure: 125 PSI
• Piston: Aluminum with nylon bearing for twist-diffusing guidance
• Housing: All-steel, corrosion-resistant, powder coated
• Spring: Steel alloy, epoxy-coated #75 spring
• Design: Deeper spring cavities, uniform output force, longer service life
• Safety: Cannot be manually released — unit remains inoperative until air supply is safe
Applications:
Purpose-built for parking and emergency brake functions in off-road heavy-duty trailers and mobile equipment. Designed for high-resilience operation in rugged, high-vibration environments where brake integrity and air system reliability are critical.
CROSS-REFERENCE(S):
KSM3060KC-800NN, KSM3075KC-800NN, MA15777, 3075, Series 30, MA46141X, MAXIBRAKE 3075, SC30, 129300256, 2109300000100, 210930000090, 8708706060, 8716905060, N36330H, N36330KV, N36330KW, N36330L, N36330M, N36330N, N36330R, N36330S, N36330W, N36330Z, S129300010, S129300011, S129300012, S129300013, S129300014, S129300015, MA15777, 070-MA15777
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:
✓ Ensure proper port and stud alignment; ports are dual 3/8"-18 NPTF
✓ Push rod length and clevis dimensions must match original installation
✓ Unit is non-manually releasable — verify system air pressure reaches safe operating level before disengaging
✓ Torque mounting hardware to OEM specifications
✓ Always install new mounting hardware and clevis where applicable
✓ Verify stroke range matches brake application requirements (standard 2.5")
SOLD AS NEW
Brand New and ready to install , no core charges or reman processing required.
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, Call: 1-877-243-0442 | Email: sales@fleet-products.com
WHY CHOOSE FLEET PRODUCTS | KBR - HEAVY DUTY TRUCK & TRAILER PARTS?
- Canadian-owned and operated since 1985
- Trusted by fleets, mechanics, and B2B partners across North America
- Fast, reliable shipping across North America
- Competitive pricing with core return refunds
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