FOR SAFE OPERATION: This power assembly jacking tool must be used prior to power assembly removal when using the "C" Frame Manipulator. This tool is screwed into the power assembly head using the two 3/4"-10 captive screws provided. The nuts on the top of the frame should be evenly tightened using the special deep well socket provided. This tool is intended to slowly and safely jack the power assembly free of the crankcase prior to assembly removal.