There were several good messages concerning old steam locomotives and
the need to spend some "fun time" preparing them for movement.
Engines that have been on "display" for decades require some special
TLC before they are moved if any thought is being given to restoring
them to service. These are extremely durable machines but, like all
machines, they have certain, definate needs and requirements.
Among the most critical of these needs is lubrication. Also, on the
subject of lubrication, the lubricated surfaces must be free of rust
and accumulated dirt and grit. The preparation of the various
rotating and sliding surfaces is too involved to cover in a posting
on the list but would be provided, off-list, to those having a need
for same.
Let it suffice to say that NO movement should be attempted with the
main rods connected to the crossheads since severe damage to the
cylinder bore can result from dry pistons moving in dirty bores.
Also, do not allow the valves to slide in their bores for the same
reason.
As for the crown brass it is good practice to try to eliminate as
much rust and grit as possible before moving the engine but it must
be remembered that the required fourty year inspection will demand
that the boxes be disassembled allowing the bearing surfaces to be
renewed.
Among the other concerns is the loss of sheet thickness as the result
of years of moisture collected in the lagging surrounding the boiler
and firebox wrapper. The only method of determining the extent of
this loss is by a through cleaning of the boiler and wrapper folowed
by an inch-by-inch density check using ultra sound equipment.
Any group contemplating a restoration to service of a locomotive
should begin by obtaining a copy of CFR49, Part 230. This document
contains the new requirements for steam locomotive operation and
repairs. It's available from various web sites or from me, if a
person has a need for the information.
I'll be glad to answer questions on this subject on or off list if
there's an interest.
Karl
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