Flow & Pressure Limiting Control
Magnum handheld hydraulic core drills are limited to a Maximum hydraulic flow of 20ltr per minute and maximum 150bar
So if your intentions are to use this type of hydraulic powertool from a power source that is rated above 20ltrs per min and 150bar, you will need to reduce the flow and pressure accordingly.
Even small mini diggers might produce 23ltrs/min at 180bar, this is still too much and could cause some internal damage to the Magnum.
Using an Oil-flow limiter will control the maximum hydraulic oil flow and pressure to a safe and suitable level.
Flow & Pressure Limiting Control  shown in the middle of the image above.
*A hydraulic extension hose maybe required to connect the divider to the hydraulic tool.