Description
287479X – DD-3 BRAKE ACTUATOR (LH)
PART NUMBER(S):
Fleet Products: 287479-G (New), 287479X (Remanufactured) | Replaces OE: Bendix K287479 | MCI 287479, 287479X, 287479N, 4R-5-1, 4R-5-1CGRM
DESCRIPTION:
Model: DD-3 Safety Actuator – Left Hand Type 30, dual diaphragm with mechanical push rod locking system
Vehicles: Motor Coach Industries (MCI)
• Side: Left-hand (LH)
• Configuration: Horizontal mount, short rod
• Dimensions: 2.66 in rod end to non-pressure plate (A)
• Dimensions: 3.88 in yoke pin to plate (C)
• Dimensions: 12.69 in stud end to plate (E)
• Dimensions: 1.25 in stud end to plate (E)
• Mounting: Stud clocking 270°
• Material: Steel chamber assembly
• Performance: Mechanical push rod locking system
• Features: Yoke orientation 315° / 225°, push rod clocking 0° / 180°, port clocking 90°
Applications: This remanufactured left-hand DD-3 actuator is engineered for MCI coaches and other heavy-duty transit vehicles that require secure mechanical park brake retention. Suitable for fleet maintenance and replacement of OEM-grade short rod LH chambers.
CROSS-REFERENCE(S):
287479, 4R-5-1CGRM, 287479X
A cross-reference listing means this part is a suitable replacement for the part numbers listed. Please confirm all ports and dimensions match your application before installing.
IMPORTANT INSTALLATION NOTES:
✔ Confirm left-hand horizontal mounting and short rod configuration before installation
✔ Use BW 204-M barium lubricant inside shaft cavity during assembly or rebuild
✔ Connect lock port properly to enable mechanical push rod hold function
✔ Push rod must align to slack adjuster at ≥90° for optimal brake performance
✔ Clamping ring bolts must be torqued evenly to 15–25 ft-lbs to prevent diaphragm leaks
✔ Ensure yoke and mounting clocking match OEM alignment
SOLD AS REMANUFACTURED | CORE RETURN REQUIRED
Built to OEM standards | thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
Warranty Information
