Hydra-Pac Synchronous Power Units provide synchronized control of multiple hydraulic cylinders. They are suitable for operation of all Hydra-Slide Skidding Systems, Turntables, Climbing Jacks, and other double-acting jacking applications. These power units are designed with multiple independent oil circuits, providing equal flow to each line regardless of weight distribution and allowing the operator to raise or lower virtually any load equally on all points.
These single-circuit, cart-mounted power units are suitable for the operation of all Hydra-Slide skidding systems, turntables, and alignment shoes, as well as most double-acting jacking applications. They are suitable in applications that do not require synchronized flow rates. These units have a single oil supply circuit—it may be split into multiple outlet ports, but since they are connected, the pressure will remain constant in all lines and the flow rates may differ.
The [HT500] push/pull cylinders enabled us to precisely position the transformer above its alignment marks, while the synchronous power unit allowed us to safely synchronize all movements with the push/pull cylinders, as well as all movements of our jacks. This system allows us to complete these projects in a 100% safe manner."
Northwest Crane Service LLC utilized a Hydra-Slide HT500 heavy track skidding system powered by a Hydra-Pac synchronous power unit to install a 119,000 lb (54,000 kg) transformer at a live power station.
The principal challenges in sliding the transformer were created by limited site access, a significant slope, and a live substation environment with energized electrical equipment in close proximity to the surrounding work area and overhead. Hydra-Slide’s ongoing collaboration was noted as key to piecing the heavy rigging puzzle together.