Hyunsang KRA11190 Center Swivel Joint Assembly

The Hyunsang KRA11190 center swivel joint (rotary union) is designed for the hydraulic swing circuit of Sumitomo SH240 class crawler excavators. It facilitates the transfer of high-pressure hydraulic fluid between the stationary undercarriage and the rotating superstructure, enabling continuous 360-degree rotation without hose twisting. Constructed from high-strength alloy steel with precision-machined internal spools and advanced composite seal technology, this unit withstands peak system pressures of 35 MPa. The multi-port configuration accommodates main pump flows, pilot circuits, and drain lines. Direct interchange for OEM part numbers KRA11190, KSA1305, and KRA12910. Verified fitment for SH240-3, SH240-5, SH240A3, and SH240A5 models powered by Isuzu 4HK1 or Cummins 6BTAA5.9 engines.