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Build Diary entries for February 2019

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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Stretchers inspected by VAB
05/02/2019
  Highslide JS
  On 5 February the work on the cast steel stretchers was inspected by John Graham for Wayne Jones and Partners who are our Vehicle Acceptance Body. The stretchers passed the inspection and John has signed the documentation. You can see that CTL Seal have been welding more plates into the bedplate so that all components can be accurately aligned.
   
Bogie Bolster Centre Pivot Arrives
11/02/2019
  Highslide JS
  here's a brand new, shiny bogie centre pivot sitting on the inspection bench in CTL Seal. The pivot is fastened to the bogie stretcher, fixed between the main frames and pointing downwards. This engages with the centre slide on the bogie. You can see that the main bearing surface has a shallow radius. This allows the bogie to rock slightly as it negotiates the track.
   
Drilling the Frame Keep Bolt Holes
11/02/2019
  Highslide JS
  The machining of the middle cast steel stretcher is reaching a conclusion. We have been held up by sickness of a key machinist. Here the bolt holes for the frame keeps are being drilled
   
Bogie Bolsters
18/02/2019
  Highslide JS
  These are the 2 bogie bolsters. They sit at the front of the frames at the bottom and engage with hemispherical cups on the bogie. They support the weight of the front of the locomotive and allow the bogie to have a certain amount of relative movement. The bolsters are being inspected after having had the lubrication holes drilled. The grease is fed through the holes to the slots in the bolster face. The lubrication holes have to be drilled accurately as they all have to arrive at the bottom of a 1/2" pipe union hole on the other side of the bolster

The cast stretchers have had to be returned to the machine shop. We've found that the metric equivalent of the 1-1/4" thick main frame plates is slightly oversize. A shallow groove in the stretchers needs to be eased out to allow the main frames to sit correctly on the stretchers. We're hoping that machining will be finished towards the end of the week.
   
Middle Stretcher Machining Finished
25/02/2019
  Highslide JS
  This was the final step in the machining of the middle cast steel stretcher. Not long after this photo was taken, the stretcher was lifted off the machine, ready to go to the assembly area. Here Keith and Alan from the SSLC engineering team discuss with CTL Seal "spot facing" of the stretcher. Spot facing ensures that the fasteners (here a nut and washer) sit on a flat surface rather than the rough metal of the casting. 4 spot faced bolt holes can be seen below the machinist's right hand.