Description
TYPE 30 MAXIBRAKE – I SERIES UNIVERSAL SPRING BRAKE
PART NUMBER(S):
Fleet Products: M3075DIO | OE: KSM3075KC-800NN, MA15777, MA15765 , CAT 9K0887, 8R2485, Navistar: 82-31555-000, Hino: 8708706060, 8716905060 N-Series: N36330 S129300010, S129300011, S129300012, S129300013, S129300014, S129300015, 19A1264, 479476
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):
Komatsu / KSM: KSM3060KC-800NN, KSM3075KC-800NN, KSM3075GC800NN, KSM3075KC800NN, KSM3075GC-175NN, KSM3075GC-800NN, KSM3075GC175NN, KSM3075GC800NN, KM3075 Haldex MA-Series: MA15765, MA15777, MA15777X, MA46141X, 070-MA15777 Industry Identifiers: 3075, 3075DO, Series 30, MAXIBRAKE 3075, SC30, 38Z375, 5396-MA15777, 5396MA15777, 767653016948, CMA15777, C-MA15777, ZZMA15777, MBIMA15777, MIDMA15777 International / Navistar: 82-31555-000, 8231555000 Komatsu: 129300256, 2109300000100, 210930000090 Hino: 8708706060, 8716905060 N-Series: N36330H, N36330KV, N36330KW, N36330L, N36330M, N36330N, N36330R, N36330S, N36330W, N36330Z S-Series: S129300010, S129300011, S129300012, S129300013, S129300014, S129300015 Other OEM: 19A1264, 479476, ZZMA15776X
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")
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Warranty Information
