Monday, 11 February 2013

Achilles Report No26: Measuring Crank Pins...

Hi guys. Today, "Achilles" made a quick journey along the M6 and the A46 towards Eddie's house. There, we measured the wear in the crank pins in order to compare the results against the original drawings. The crank pin bushes were originally designed for an internal diameter of 3/8". Following 25 years or so of use, "Achilles" has around 3-4 thou of wear on the crank pins, but this is variable across each pin. Therefore, the brand new bushes will be bored out to the appropriate size on each pin, making a tight running fit across all of the axles. Below left, we see three of the old bushes: worn and abused. Below right, we see all six brand new bronze bushes of the two-diameter type...made and ready for fitting...
Now that "Achilles" has her six new bushes ready for fitment, we can concentrate on getting them on. The two front coupling rod bushes are of a single-diameter type and are not in too bad a condition so will be left as they are. The engine will now require crossheads and little end bushes. Thanks for reading folks. Sam.

No comments: