Section III.
OPERATION UNDER USUAL CONDITIONS
33. General
a. The instructions in this section are published for the information and guidance of the personnel responsible for the
operation of the water distributor.
b. It is essential that the operator know how to perform every operation of which the water distributor is capable. This
section gives instructions on starting and stopping the water distributor, the basic motions of the machine, and how
to coordinate the basic motions to perform the specific tasks for which the water distributor is designed. Because
nearly every job presents a different problem, the operator may have to vary the given procedure to fit the
individual job.
34. Starting the Engine and Water Pump
a. Turn the suction valve control lever (17, fig. 4) and the discharge valve control lever (15, fig. 11) to OFF.
b. Turn the spraybar valve levers (15 and 16, fig. 4) to OFF and perform the daily preventive maintenance services
Caution: Do not start the engine unless the pump housing is full of water or serious damage will result.
e. Pump the fuel pump priming lever (11, fig. 4) 20 or 30 times to inject gasoline into the carburetor for easier starting.
g. Set low oil pressure shutoff switch to start position.
h. Pull out the magneto stop switch (2).
i. Press the starter button (1) to actuate the electric starting motor. Release the button as soon as the engine starts.
Warning: When using the handcrank to start the engine, do not attempt to spin the engine. If the engine does
not start on the first pull, re-engage the crank and pull up again. Be sure the crank does not bind on the
crankshaft.
j. After the engine starts, adjust the choke control for best idle until the engine is warm then push the choke all the way
in. Adjust governor control (3, fig. 11) for proper operating speed.
35. Stopping the Engine and Water Pump
a. Normal Stopping.
(1) Unlock the governor control (3, fig. 11) by turning it counterclockwise and push in to allow the engine speed to
decrease to an idling speed.
Caution: Run the engine at idling speed for at least 3 minutes to assure even cooling.
(2) Push in the magneto stop switch (2).
(3) Close the fuel shutoff valve (3, fig. 10).
(4) Perform the daily preventive maintenance services (para. 49).
(5) Drain the water tank, pump and lines if freezing weather is expected.
b. Emergency Stopping. In an emergency, such as failure of the magneto stop switch, stop the engine by depressing
the emergency ground button (22, fig. 18) on the bottom of the magneto.
36. Operating Details
To operate the water distributor, the operator must become familiar with the position of the valves and the direction of
the water flow for each operation. The following paragraphs provide step-by-step instructions for the operations for
which the distributor is designed. (See Operating Instructions Plate.)
a. Filling the Tank front an Overhead or Other Pressure Source.
(1) Move the water distributor within easy reach of the water source.
(2) Turn the suction valve control lever (17, fig. 4) to OFF.
(3) Turn the discharge valve control lever (15, fig. 11) to OFF.
(4) Open the manhole cover (1, fig. 2), to insert a hose from the water source, open the valve at the water source,
and fill the tank.
AGO 6871A
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