Excelsior Rebuild (Again 2016)
My Accucraft Excelsior was number 005 ever built, and with it came all the usual Accucraft problems, noisy burner, erratic too fast running caused by the tiny cylinders. Over the years she became the pride of the fleet. SM32 cylinders were fitted (sadly the site seems to no longer exist but you can read about the original installation HERE) followed by a new burner and eventually she became a solid performer. Until at last she wheezed to a stop.
On closer inspection, the axles were worn through,the bushes were worn, the piston 'O' rings leaked, in short,she was worn out. This is her revival..
The boiler has been removed, and all the steam fittings taken off. The SM32 cylinders use a Roundhouse 'O' ring, so the cylinders have been removed and new 'O' rings fitted. A new greaseproof paper gasket is required to seal the steamchest from the piston, and then the pistons can be re-set for best performance, once we've got some smooth running.
The boiler has had it's drainhole retapped and the pressure gauge fittings retapped as well, with new banjo fittings to suit.
The steamchest is reattached to the cylinders with new M2 counter sunk bolts, all of which have to be slightly shortened to make sure that they seal correctly. On the first steam test I had left the bolts too long and the cylinders leaked.
The saddle tank has been filled with insultating material to try to increase run time and reduce heat loss.
The wheels, bearings and piston rods are from a Accucraft Leader engine. The old ones fittings were imperial, the new ones are metric so some fettling had to take place.
The body and saddle tank is sprayed with etched primer and after24 hours drying is cooked gently in the oven for 30 minutes all so. Satin black was used as the final coat, before being cooked again. If you can find it, lead based paint is way better than modern car paint, it doesn't chip as easily.
Don't forget to fit new copper washes on all the banjo bolts and steam fittings ratherthan fibre washers which aren't as good.