It is only a simple lift and force pump, driven from the
cross head. That is where it gets its name and it don't mean that you
are to get cross at it if it don't work, for nine times out of ten the
fault will be yours. Now I am well aware that all engines do not have
cross head pumps and with all respect to the builders of engines who do
not use them, I am inclined to think that all standard farm engines
ought to have a cross head pump, because it is the most simple and is
the most economical, and if properly constructed, is the most reliable.
A cross head pump consists of a pump barrel, a plunger, one vertical
check valve and two horizontal check valves, a globe valve and one stop
cock, with more or less piping. We will now locate each of these parts
and will then note the part that each performs in the process of feeding
the boiler.
You will find all, or most pump barrels, located under the cylinder of
the engine. It is placed here for several reasons. It is out of the
way. It is a convenient place from which to connect it to the cross
head by which it is driven.
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