It shortened the sand pipes to the main driver, i.e.
the driver with the main rod attached. This helped get
more sand under the drivers when going forward and get
it there quicker.
John
--- jkohl <jkohl@nc.rr.com> wrote:
> >According to Bulletin #35 page 125 "All 18 M-4's
> were rebuilt into
> higher<BR>
> >speed engines, classified M-4-A, in the 1930's. At
> about this same
> time,<BR>
> >the rear sand dome was moved forward to a position
> between the forward
> sand<BR>
> >dome and the steam dome, creating an even more
> attractive locomotive."<BR>
>
> Thanks, Rupert! Well, that gives me a certain
> "prior to" date for that
> first picture, which is incorrect from what was
> actually listed on the back!
> The 2nd one then may very well be right after the
> rebuild.
>
> But that still begs the question as to WHY the sand
> dome was moved...surely
> it wasn't for cosmetic reasons...
>
> Cheers!
>
> Jan
>
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