Hydraulic gear puller, also known as a hydraulic bearing puller or hub separator.
Here's some information about this tool:
Function: It is used to easily and efficiently remove stubborn components like bearings, gears, hubs, and pulleys from shafts, especially in automotive repairs and machinery maintenance.
Capacity: Hydraulic gear pullers are available in various capacities, commonly ranging from 5 to 50 tons, allowing them to handle different sizes and weights of components.
Features: This specific model appears to be a 3-jaw puller, which offers good stability and pulling force. Many models are also designed for both horizontal and vertical operation.