Build Diary entries for July 2022

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 Wheels
04/07/2022
	We are following modern day practise in fitting oil injection to our wheels. This is used should we ever need to press the wheels off the axles. Oil is injected at very high pressure before the wheel is pressed off the axle to avoid damage to the axle. Here John inspects the oil ways (which have a threaded portion for a plug at the wheel boss) before the grooves are machined.
Bogie Frame Plates
04/07/2022
	The final stage in machining the bogie frame plates is to machine the chamfers for the frame keeps. All of the frame keeps use a locking taper (1 in 8) - so a taper is required on the frame keep that has to match a taper on the frame. Sam from CTL Seal gets on with the job
Bogie Frame Plates
11/07/2022
	The bogie frame plates are now off the machine and are awaiting inspection. The last job was to ensure that the frame keeps are fitted to the plates. On the outside edges of the plates, where the frame keeps "grip", there is a locking taper on the edge of the plate and the frame keep. With the frame keeps sitting loosely, as in teh pictire, there is a 60 thousands of an inch gap between the plate and the frame keep. With the keeps bolted up, that gap will disappear. Here Alan and Keith check the final dimensions. Next week, the Monday gang will use the small magnetic drill to lightly chamfer all of the bolt holes
Internal cannon box components.
19/07/2022
	Update 18-07-2022. We have now collected all the 100 plus internal components for the front bogie cannon boxes, these are now being checked and measured. Here is a photo showing some of the smaller items. The long bolts pass through the body of the cannon box and secure the end covers. The heads have holes so that they can be wire locked in position. The smaller items are the drain plugs. These were introduced as a modification in April 1954; the slot in the centre allows the drain plug to be loosened and for a sample of oil for testing to be obtained without loosing the entire contents. Sample of oil in this sort of area can detect any early symptoms of damage or wear.
Bogie Frame Plates - Chamfering
25/07/2022
	Machining of the bogie frame plates is now complete. The last job before we start a trial assembly is to lightly chamfer all of the bolt holes. This removes any burrs and ensures that the faces of the bolts and nuts will sit firmly against the frame plates. Here Ian Henderson from SSLC uses the small magnetic drill and a countersink bit to chamfer the holes. Compare the bolt holes to the left of the drill with the ones still to be done on the right. Photo by Chris Jones
Bogie Cannon Axleboxes
27/07/2022
	One of the bogie cannon axlebox castings is now on the big Juaristi machine at CTL Seal for the final stage of machining. Once the castings were received from the foundry, the first machining stage was to machine the surfaces for the manganese steel face and side liners. These provide a hard wearing surface where the axlebox moves up and down inside the axlebox guides bolted to the frames. Next stage in the process was to weld the manganse steel liners to the axlebox body. At this stage, the liners are over size. The final stage - shown here - is to complete all the machining work including machining the manganese steel liners down to the correct profile. Other work will be end facing (for the end covers), machining the internal profiles and drilling out mounting holes and the holes for the drain and vent plugs.