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.
| Bogie Axlebox Guides - 1 |
| 03/08/2020 |
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7 bogie axlebox guides having completed stage 1 machining. They will be going back on the machine for stage 2 machining. However, the face that abuts the axlebox itself will be finish machined once it is assembled on the bogie frame. |
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| Bogie Axlebox Guides - 2 |
| 03/08/2020 |
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The eigth axlebox guide can be seen inside the CNC machine station |
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| Tightening the Nuts |
| 10/08/2020 |
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The fitted bolts for the frame are secured by Philidas locking nuts. Most of the bolts are 1-1/8" diameter with some at 1-1/4". The nuts have to be torqued up to a specific torque setting, 360 lb ft for the former and 500 lb ft for the latter. Fortunately CTL Seal have a hydraulic torque wrench which makes the job a lot easier. Damien can be seen here tightening the nuts. If you're wondering about the surplus washers on the bolts above his left hand, all will be explained next week! |
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| Bogie Stretcher Progress |
| 10/08/2020 |
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Meanwhile, in the machine shop, the recesses for the bogie bolster pads were being machined. Circular brass pads fit into the recesses, secured by 4 countersunk head set screws. These transfer the weight of the front of the loco to the bogie via bolster cups. |
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| Hind Beam Components |
| 10/08/2020 |
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Over in the fabrication shop, the 3 hind beam components have been through heat teratment after fabrication and are awaiting Ultrasonic Testing. The 2 gussets on the right strengthen the corner between the frames and the hind beam. They also transfer the weight of the loco to the trailing delta truck using a bolster system similar to the bogie. Top right is the intermediate rubbing block which is fixed to the centre back of the hind beam. UT tetsing is scheduled for Wednesday, after which the components are off to the machine shop. The rubbing block needs the radiused surface to be machined before manganese steel liners can be welded to the surface. |
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| Bogie Stretcher |
| 17/08/2020 |
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The bogie stretcher has now completed testing and is in the inspection bay. Inspection is scheduled for this week. |
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| Hornguide Machining Gets Closer |
| 24/08/2020 |
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The frames are now scheduled to go into the machine shop for hornguide machining at the beginning of September. In the image, the hornguide is the U shaped flange next to John Hind's right shoulder, the frames are currently upside down. In preparation for machining, today we took a series of measurements across the frames; John is using an inside micrometer for this job. For the weekend of 29/30 August, the plan is to replace the 4 bolts adjacent to the hornguides with rivets - this makes 48 in total, 8 per hornguide. There is insufficient clearance between the frame/stretcher bolts (horizontal) and the frame keep bolts (vertical). By changing the horizontal bolts with rivets, it means we can extract the frame keep bolts in the future, should this be needed. The frame keep can be seen above John's head. This is currently the right way up as it is being used to clamp the frame in this area. Once the hornguide has been machined, it will be removed so that the top and bottom faces can be machined on the keep. |
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| Stop Press - Riveting in Progress! |
| 29/08/2020 |
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We have decided that the 4 bolts that are adjacent to the frame keep pads will need to be replaced by rivets in order to be able to fit the frame keep bolts. Here is John from Varley Boilers installing the second rivet today. Only 46 more to do! |
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| Riveting of Frames Complete |
| 30/08/2020 |
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Yesterday, 30 August, saw 48 rivets placed in key positions on the frames. The job was succesfully completed by Varley Boilers; the picture shows the action within CTL Seal's assembly shop. For some detailed photos of the day's activities follow this link. |
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