JCB 15/905504 Brake Master Cylinder Assembly

This brake master cylinder assembly converts mechanical pedal force into hydraulic pressure for the service brake system. It features a tandem reservoir design for dual-circuit safety compliance. The unit is engineered to OEM specifications for bore diameter, stroke length, and port thread configuration to ensure direct interchangeability. Compatible with JCB backhoe loader models including 3CX, 4CX, 3CN, 4WD, 214, 215, 216, 217, 3C, 3D, 3DX, 4C, 4CN, 1400B, 1550B, 1600B, and 1700B. Replaces OEM part numbers 15/905504, 15/920158, and 15/920389. Constructed from high-strength aluminum alloy body with corrosion-resistant plating and EPDM seals compatible with DOT 4 brake fluid.