Bucyrus
Two pipe rotorseal for Bucyrus 61RB
This two pipe rotorseal facilitates the transfer of hydraulic fluid or air between stationary and rotating components of the Bucyrus 61RB excavator. It is identified by part number ZA1738.
Compatible models
Specifications
- Part number
- ZA1738
- Brand
- Bucyrus
The two pipe rotorseal, also known as a rotary union or swivel joint, allows for the continuous passage of pressurized fluids between fixed and rotating sections of heavy machinery. This component is designed to maintain hydraulic or pneumatic circuit integrity while the machine assembly undergoes 360-degree rotation. By providing two independent internal channels, it supports both supply and return flow requirements for hydraulic systems, ensuring that power is delivered to rotating actuators without restriction.
This specific unit is engineered for the Bucyrus 61RB excavator. It serves as the interface for fluid transfer to the swing motor and other superstructural hydraulic functions. The assembly consists of a stationary housing and a rotating shaft, utilizing precision seals to prevent fluid leakage during operation. Proper integration of this component is necessary to maintain system pressure and prevent erratic movement or loss of power in the swing mechanism of the excavator.
In hydraulic systems, a rotorseal acts as a bridge for fluid power. It enables the machine to perform continuous rotational work by ensuring that hydraulic lines do not twist or bind during operation. When installed correctly, it allows for smooth, controlled movement of rotating assemblies by managing the flow of oil or air through the pivot point of the machine.

