The picture below shows the centre driving axle. The horn clip has been bolted into place but still awaiting its split pins. The horn clip is the metal plate just below the brass oil filler / drain plug. The loco has a brand new set of springs, one of which is shown in place under this axle box. Final adjustment of the springs will not take place until the loco is fully rebuilt.
This picture of the same axle has been taken from a slightly different angle. It shows the axle disappearing into the axle box, at this point just above the brass filler / drain plug, is the dust shield which is a form of collar around the axle.
The picture sequence runs from the rear through to the front.
1, under the cab.
3, mid way along the frame.
4, above the cylinder.
5, Through the frame and down in front of the saddle.
6, finally through the front buffer beam, into the swan neck and into the flexible pipe ( otherwise known as the vacuum bag!) This in turn locates onto its stop which is known as the dummy coupling.