Front Bogie

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	November 2022 With the axleboxes assembled in South Devon and bearing clearances checked, the wheels need to be pressed onto the axles. Before starting the operation, a check is made that the wheels are at 90 degrees to the axle.
	November 2022 The wheels have been pressed onto the axle using a large hydraulic press
	December 2022 At Heritage Rail Traction, the bogie spring cradles are being dimensionally checked with a large vernier gauge.
	January 2023 The next stage in South Devon is to true the wheel centres before the tyres can be fitted.Note how the machine is working on both wheels at the same time
	January 2023 To fit the tyres, South Devon have a tyre heating area. A set of gas burners are stationed around the tyre in a shallow pit and the tyre is heated so that it expands - just enough so that the wheel set assembly can be lowered in. The tyre is then allowed to cool and it will shrink onto the wheel.
	January 2023 Here is the wheelsets with both tyres fitted to the wheels. The next step will be to machine the tyres to the required profile.
	January 2023 John is using an internal micrometer ( a genuine ex Crewe Works tool) to confirm that the axlebox faces are parallel.
	February 2023 With the frame plates bedded to the stretcher, we now need to drill and ream all bolt holes so that fitted bolts can be ordered. We have recently acquired a magnetic drill for this sort of work.
	These axlebox spring cups were manufactured by Alpenbury Engineering in Rotherham. They are fitted into recesses at the top of the bogie axle cannon boxes. The round domes of the bogie spring cradle will fit in the cups. These will be a tight fit in the cannon boxes and we need to file a small flat on one side to let the air under the cup escape.
	We are ensuring that the axlebox guides fit tightly against the frame plates. Here John is using engineers blue to identify the high spots and then using a scraper to remove them

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109 records found. Page 9 of 11 displayed.