Introducing the Monaco Tool 50175 counterbore tool for heavy-duty engines like the Cummins HSK78 / QSK78. This is a precision portable machining tool used to restore or repair the cylinder block’s top counterbore ledges.
The Cummins HSK78 (officially marketed as the HSK78G) is a massive 78-liter, V12 lean-burn natural gas engine. Unlike the diesel engines typically found in on-highway trucks or heavy equipment, the HSK78G is a stationary powerplant purpose-built for heavy-duty, high-capacity electrical power generation.
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