This will allow you another eighth of an inch to take up
in wear.
Now here is a nice little problem for you to solve and I want you to
solve it to your own satisfaction, and when you do, you will thoroughly
understand it, and to understand it is to never allow it to get you into
trouble. We started out by saying that in a new engine you would most
likely find about one-eighth of an inch between the brasses, and we said
you would finally get these brasses, or halves together, and would have
to take them out and file them. Now we have taken up one-eighth of an
inch and the result is, we have lengthened our pitman just one-sixteenth
of an inch; or in other words, the center of wrist pin and the center of
cross-head are just one-sixteenth of an inch further apart than they
were before any wear had taken place, and the piston head has
one-sixteenth of an inch more clearance at one end, and one-sixteenth of
an inch less at the other end than it had before. Now if we take out the
boxes and file them so we have, another eighth of an inch, by the time
we have taken up this wear, we will then have this distance doubled, and
we will soon have the piston head striking the end of the cylinder, and
besides, the engine will not run as smooth as it did.
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