Method of assembling a dynamoelectric machine and an auxiliary cooling device

A method of assembling a cooling shell arrangement in heat transferring relationship with an outer peripheral surface of a housing of a previously fully manufactured and finished dynamoelectric machine without press fitting, preheating, or defacing the finish on such housing, said cooling shell arrangement including two extruded, arcuate shaped cooling fin sections each providing an arcuate shaped inner peripheral surface substantially conforming to the curvature of said outer peripheral housing surface, the method comprising:

• moving said two arcuate shaped cooling fin sections radially against said housing to make substantially simultaneous contact between all portions of each conforming inner peripheral surface and the previously finished outer peripheral surface of said housing of the dynamoelectric machine;
• positioning said cooling fin sections with first ends thereof sufficiently close to one another to permit clamping thereof;
• engaging the first ends of the cooling fin sections with a locking and tensioning member and locking such first ends together;
• holding the cooling fin sections in tension around the outer peripheral surface of the housing with second ends thereof sufficiently close to permit clamping thereof;
• and engaging the second ends of the two cooling fin sections with another locking and tensioning member so that said cooling fin sections are locked together and held in tension about the housing and thereby maintained under tension in a fixed position on the finished housing.