Excavator boom mountable high pressure hydraulic tool including a hydraulic motor driven generator

An excavator boom mountable high-pressure hydraulic tool and having a full rated pressure, the tool comprising:

• an electric power generation assembly including:
• a hydraulic motor having a motor output shaft, a sealed housing enclosing an entirety of the motor output shaft within an interior thereof, and a motor non-contact coupling mounted on the motor output shaft within the sealed housing;
• an electric generator having a generator input shaft and a generator non-contact coupling coupled to the generator input shaft and positioned entirely outside the sealed housing, the motor non-contact coupling being drivingly coupled to the generator non-contact coupling;
• and
• tool electrical components electrically coupled to the electric generator of the electric power generation assembly to receive power from the electric generator;
• a high pressure hydraulic tool circuit including a hydraulic tool load and the hydraulic motor of the electric power generation assembly coupleable between a hydraulic boom inlet line and a hydraulic boom return line;
• wherein both the hydraulic tool load and the hydraulic motor of the electric power generation assembly are designed to input hydraulic fluid up to the full rated pressure of the tool;
• and
• wherein the sealed housing of the hydraulic motor of the electric power generation assembly is designed to retain hydraulic fluid within the interior up to the full rated pressure of the tool so that no case drain or separate low pressure return line is necessary.