Monday, October 8, 2007

Lining Up the Main Bearings

Lining up the main bearings of the Tod Engine in preparation for setting the crankshaft and flywheel has begun. We are using the piano wire method, and have learned about a shortcut that the original engine erectors made to simplify the process.

On each end of the main bearings two punch marks have been made. Each one at the centerline elevation of the crankshaft and located 22" ahead and behind the centerline. By stringing piano wire between those two punch marks in the four locations then running another line perpendicular through the centers of the bearings a relatively accurate means of centering the bearings can be accomplished. I can hold the piano wire in place with magnets and two wire holders that have been specially made for this purpose.

The LP bearing is in its final position, and the LP bearing will be moved until it lines up. It has about 2" vertical and 3" horizontal travel to go before it lines up. Once the bearings are in line we will start work on getting the lower flywheel half in position.

No comments: