Wednesday 8 May 2019

Painting the engine

Now that it all fits together, the engine can't be painted without taking it apart again!
It is now split up into sub-assemblies ready to be painted.
I shall use WaxOyl for hidden parts and mating parts where a layer of paint might otherwise upset the spacing achieved without a thick layer of paint.
Silver barbecue paint will be used for surfaces likely to get hot (e.g. cylinders and nearby structures).
I thought yellow would be good for moving parts - I have been aware that there are heavy fast moving parts which could damage the unwary: yellow is a suitable warning colour?  If I have some left over I can use it for lining on the outside panels to provide extra visibility.
The rest will be dark green as before.
Copper and brass may be left untreated and available for polishing.
Parts to be treated will have to be rubbed down and washed (I am reminded of a children's story in which dirty pigs did not want to be washed, and responded to the idea of soap with "Oofy, Poofy, nope")
While re-assembling, steam sealing will take place - valve chest, cylinder ends, inlet and outlet pipe fittings + piston rings, and piston and pump rod glands.  Any parts which might come loose will need to be thread locked or punched into place.
--------
Wed 22nd May
Work in progress.
One side of the engine is painted and re-assembled - this time with piston rings, gland stuffing and "Steam Seal".  I was forgetting how much assembly I had achieved, and now have to repeat! I am so pleased that I had bought a hub puller and other useful tools to help with assembly and dis-assembly.
I wish I had used gloves when handling the Steam Seal; it is designed to withstand hot pressurised steam, and easily resists any attempt to remove it from hands using domestic hot water and soap/ detergent - I suppose I should be pleased that it performs.
I have also filed small slots in the  cylinder end covers so that I can insert a screwdriver to lever off these bits for future maintenance activities.

Picture of completed and painted engine is awaited!

1 comment:

  1. Hi Alan,
    Yes 'Steam Seal' is very messy stuff!! White spirit removes it from skin very easily!!
    Rgds
    Greg

    ReplyDelete