|SP2479 - Dec 27, 2011|
Today the left crosshead was returned to the locomotive. With the crosshead in place, bolts were installed in the lower guide. All of the news is not good.
The crosshead was found to be pinched tight when full forward. A .025 inch shim was added at the front upper hanger to free the crosshead. When the crosshead was pulled to back to end of travel, a similar situation was encountered.
Measurements show the upper and lower guides being within .005 inch at the two points that have been used to establish guide positions. Neither guide is perfectly flat. The upper guide has a very slight arc to it. Solution to the problem will be identified after the first of the year.
There will be no work session Saturday, Dec 31, 2011