Description
287475-G – DD-3 BRAKE ACTUATOR (RH)
PART NUMBER(S):
Fleet Products: 287475-G (New) | OE: 287475X, 4R-5-2, K287475
DESCRIPTION:
Model: DD-3 Safety Actuator – Right Hand
Vehicles: Motor Coach Industries (MCI)
• Chamber Type: Type 30, double diaphragm with mechanical push rod locking roller system
• Configuration: Horizontal mount, right-hand, short rod
• Dimensional Specs:
• Rod End to Non-Pressure Plate (A): 2.66 in
• Push Rod Clocking (B): 0°
• Yoke Pin to Plate (C): 3.88 in
• Stud End to Plate (E): 12.69 in
• Yoke Orientation (L): 315°
• Mounting Stud Clocking (M): 270°
• Non-Pressure Plate Port Clocking (N): 90°
Applications: Built for MCI coach braking systems, this RH DD-3 actuator ensures reliable braking under normal, emergency, and parking conditions. Ideal for transit bus platforms requiring a factory-fit direct replacement with secure park brake retention.
CROSS-REFERENCE(S):
287475X, 4R-5-2, K287475, 4R-5-2CGRMA 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 Right Hand configuration and short rod before installation
✔ BW 204-M barium lubricant must be applied inside shaft cavity during assembly
✔ Lock port must be properly connected to maintain mechanical hold function
✔ Push rod must align ≥90° to slack adjuster for safe brake response
✔ Clamping ring bolts must be tightened evenly to prevent diaphragm seal leaks
✔ Ports must be plumbed according to OEM schematic for DD-3 function
✔ New actuator – no core return required
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Warranty Information
