Frame Assembly Phase 2

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For most of the photos on this page, you can click the image for a larger picture.

	Making sure that the inside faces of the frames are degreased and clean before installing the dragbox. This must be a metal to metal contact, i.e. the faces cannot be painted.
	The dragbox is secured by bolts that go through the dragbox, the frame extensions and the hind beam gussets. We decided to use a drill jig to perform the drilling/reaming in 2 stages. First by drilling/reaming the gussets, secondly by drilling/reaming the dragbox and frame extensions. The gussets have been mounted on a machining bench and checked that the top surface is level in all planes. The drill jig is firmly bolted to the gussets; Mike and Keith are about to start drilling with our Asquith drill.
	Drill jig bushes are used to locate the drill. First a 26.5mm hole is drilled. Then a 27mm reamer (as in the photo) is used to finish the hole.
	With the gussets finished, it was time to move onto the frames. The drill jig has been bolted into position and temporary bolts fitted to all holes except the hole being drilled.
	November 2024 With the gussets in place, we could start to drill/ream the bolt holes that are used to fasten the diaphragm plate to the top of the hind beam. The boiler and smokebox are fixed at the front of the locomotive to the smokebox saddle. As the boiler heats up, it expands so that back of the boiler will move backwards. The firebox sits on 4 feet that can slide on fireboxx support pads. On a BR standard, the cab is fitted to the back of the firebox. The rear of the cab is bolted to the diaphragm plate. The diaphragm plate consists of 2 plates and its job is to be able bend as the boiler expands. Mike H at work with the Asquith drill.
	March 2025 One of the March riveting jobs was to secure the rubbing plates to the hind beam and gussets. The rubbing plates are manganese steel; intermediate buffers on the front of the tender press on these plates. The rivets will have a countersunk head formed so the surface of the plate after riveting will be flat.

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36 records found. Page 4 of 4 displayed.