2.12. FUEL CHECKPOINTS
Each locomotive has at least two fuel checkpoints to be inspected
before operating the engine.
They are the fuel-flow glasses and the fuel
cutoff valve, discussed in the subparagraphs to follow.
a. Flow.
Located
on
the
duplex filter assembly are two
fuel-flow sight glasses.
The fuel
flow in the right glass, the one
nearest the engine, should be clear
and free of bubbles for proper
engine operation.
Figure 2.10
shows the duplex filter assembly
and the two fuel-flow glasses.
b. Cutoff
valve.
In
an
emergency or by accident, the fuel
cutoff valve can be tripped by a
pull cord to stop the supply of
fuel to the engine.
Whenever the
valve is tripped, it must be reset;
it must be open for the engine to
operate. Look at figure 2.11. The
yoke normally holds the valve open,
but when the lever is raised, the
yoke also comes up, depresses the
valve stem, and stops the fuel
flow.
To reset the valve, the
lever is depressed, making the yoke
slide into place and raise the
valve stem.
Fuel is once more
flowing into the engine.
Figure 2.10.
Duplex Fuel Filter
Assembly.
Figure 2.11.
Fuel Cutoff Valve.
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