Heavy Equipment Parts stocks swivel joints for excavators also called centre joints or rotary unions the hydraulic component that allows the upper structure to rotate 360 degrees while maintaining continuous hydraulic flow to the travel motors and undercarriage systems. A leaking swivel joint causes travel sluggishness and hydraulic oil contamination. Our swivel joints are precision-machined to OEM port configurations and pressure ratings. Compatible with Komatsu, Caterpillar, Hitachi, Hyundai, Kobelco, Volvo, Doosan, and more. Fast dispatch from Sydney.