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Build Diary entries for April 2024

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 Axlebox Guides and Liners
03/04/2024
  Highslide JS
  The 8 bogie axlebox guides have been fitted with their manganese steel liners and are now ready for the next stage, which is machining for the 3 fitted bolts that hold each liner to its axlebox guide. Each assembly has been given given a unique identifier, according to its position on the bogie. The unique identifier will stay with it for life and is needed when the liners are taken off for final adjustment to set the axlebox clearances.

The X shaped grooves are for the grease that lubricates the bearing faces on the axlebox. Manganese steel is a hard wearing steel, that is fitted to axlebox faces to minimise wear on faces.
   
Pony Truck Wheels
11/04/2024
  Highslide JS
  Our Pony Truck wheels have been cast at Trefoil Steel Co Ltd and machined at L&H Engineering Limited in Worksop. Today, Geoff, John and Harry went to Worksop for final inspection. Both wheels have checked out OK and will be delivered to CTL Seal, tomorrow on Friday 12 April, just in time for the Open Day on Saturday. Final machining will be completed after the wheels have been pressed onto the pony truck axle.
   
2024 Open Day - Front Bogie
14/04/2024
  Highslide JS
  For the Open Day, we were able to assemble most of the bogie components. The final stages now are to complete the axlebox guides and liners. We need to drill/ream the bolt holes that fasten the guides to the frames and procure the fitted bolts. Then we can start a major dimension check where we will need to determine how to finish machine the liners so that there is the correct clearance between the faces of the wheelset axleboxes and the axlebox guide liners.
   
Firebox Support Stretcher
15/04/2024
  Highslide JS
  After tidying up after Saturday's Open Day, today we worked on the firebox support stretcher; in particular the support bracket bolted to the bottom of the stretcher. In the photo, you can see the top of the pony truck pivot pin under the oil can. The top taper of the pivot pin engages in a taper on the top of the bottom plate of the stretcher. The drill is sitting on the bottom plate. Bolted to the bottom of the the bottom plate is the support bracket; the bottom of which is below the spanner in Geoff's hand. The bottom taper of the pivot pin engages with taper in this bracket. Today, our job was to replace the 6 temporary bolts with fitted bolts. Mike is holding the top of the bolt with the ratchet spanner.
   
Pony Truck Wheel Video
19/04/2024
  Tom Ingall has published his latest video on the pony truck wheels. You can view it by following this link.
   
Bogie Axlebox Guides (1)
22/04/2024
  Highslide JS
  This morning, Alpenbury Engineering had drilled/ream the guide to liner bolt holes on one pair of axlebox guide/liners so Geoff was able to bring them into CTL Seal. We removed the liners from the guides and put them to one side. The axlebox guides were mounted onto the bogie frames and checked they were in the right position. We then used the hydraulic jack and 2 screw jacks to make sure that the guides were seating fully into the horn gaps on the frame. Mike is fitting the temporary bolts in the photo.
   
Bogie Axlebox Guides (2)
22/04/2024
  Highslide JS
  The next job is to set up the Asquith "portable" drill so that the spindle is at right angles to the frame plates. This takes a bit of time for the first bolt hole. Then a 1 inch reamer is used to ream out the bolt hole before we drive in the bolt. 11 bolt holes reamed today, only another 45 to do!
   
Driving Wheels Pattern
24/04/2024
  Highslide JS
  Our design team have been working with William Cook Cast Products to produce the CAD model for the central driving wheel. This has been supported by a visit to 70013 Oliver Cromwell at Loughborough to laser scan the driving wheels. WCCP were thinking that they would have to manufacture the casting pattern as a manual process. However the modelling has been so successful that WCCP are able to use their CNC pattern making machine using the model as input data. Here the machine is working on the ribs which will support the balance weight plate ribs. On the central driving wheel there are 7 ribs on either side of the spokes; 5 on the leading and trailing driving wheels.