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Build Diary entries for July 2021

Here are the diary entries for this month. You can use the forward and backward links to see the next or previous months. Most photos taken before 2018 are small size. From 2018 onwards, most photos you see below will have a link to a full size image by clicking on the photo.

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Bogie Wheel Machining
  Highslide JS
  One of the bogie wheels being machined at CTL Seal. This stage will take the wheels close to the final dimensions. The final machining will take place when the tyres are fitted to the wheels and the wheel to the axle.
Setting Out of Frame Extensions
  Highslide JS
  Here are the rear frame extensions which will be bolted to the back of the main frames. Whereas the main frame plates are 1.25" thick, the frame extension plates are 2" thick. Over the last couple of weeks we've had to do some minor work on the dragbox (on the left of the photo at the back of the frames) and the front firebox support (on the right of the photo supported by a jack) so that these components fit tightly on the frames. The key job now is to set the correct vertical height - relative to the main frames - of the frame extensions. Dowels have been fitted in the datum holes through the main frame plates and the frame extensions. We now need to set the correct relative height at the back end (or left hand in the photo) of the frame extensions. The left hand pair of "stools" have been set with a dumpy level to the correct height of the base of the main frames. We can now use the inner pair of stools with the screw jacks to raise and lower the end of the frame extensions to set the correct height. Next week, we expect to sign off the check so that CTL Seal can start drilling and reaming to install the fitted bolts that will lock the frame extensions into place.