(c) Consult the proper application chart to determine the pump pressure and truck speed for the correct gallons per
square yard desired.
) Set the static needle (7, fig.
5) of the tachometer with the knurled knob (8)
to the desired feet per minute
(5) Distributing water.
(b) Regulate the pump pressure to the required pressure according to the application chart.
(c) Ring the signal gong (4, figs. 2 and 2.1) to signal the vehicle driver to lower the bitumeter wheel assembly (12,
figs. 2 and 2.1).
(d) The truck operator will increase the speed of the carrier until the fpm (ft. Per min.) indicating pointer coincides
with the needle (7, figs. 5 and 5.1).
) Turn the spraybar control levers (15 and 16, fig.
4) to ON for full width spray. Use left
or right spraybar valve
only one segment is desired.
Caution: Do not speed, make sharp turns, or attempt to back up the carrier when the bitumeter wheel is down.
(f) Move the spraybar to the right or left with the spraybar lateral control level (19, fig. 4) to avoid obstructions and
to maintain as straight a line as possible.
(g) When the spraying operation is completed, turn the spraybar control levers to OFF.
(h) Raise bitumeter wheel assembly with the lift rod (3, figs. 5 and 5.1).
(6) Firefighting. The water distributor can be used to fight fires and for other spraying operations. For instructions on
(7) Shutdown precautions. Do not drain the water tank, pump and lines unless freezing weather is expected.
(a) Clean the suction strainer as follows:
1. Remove the suction cap (12, figs. 4 and 4.2) from the suction tee (18).
2. Remove the strainer (8, figs. 33 and 33.1) from the tee (7).
3. Clean lint, sand, and twigs from the strainer and wash the strainer in an approved cleaner and dry
4. Reinstall the strainer (8).
5. Position cap (12, figs. 4 and 4.2) on the suction line tee (18).
(b) Drain and clean the water pump as follows:
1. Turn the spray bar valve lever (15 and 15, figs. 4 and 4.2) to ON.
2. Remove primer cap (11, fig. 42) from the top of the water pump drain plug (13) from bottom of pump, and
flush pump with clean water. Always perform this operation after pumping salt water or other corrosive
3. Install primer plug (11) at the top of the pump and the drain plug (13) at the pump base.
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
37. Extreme Heat
a. General. Care must be taken to prevent the engine from overheating. Allow the engine to idle for at least three
minutes, with the distributor not in operation, before shutting it off.
b. Lubrication. Select the proper lubricants
in accordance with the temperature. See L05-3825-221-15. Lubricate
more frequently than specified when operating in exteme heat.
c. Cooling System. Be sure all shrouding is installed and in good condition. Keep the cylinder heads and cylinder
fines free from any oil and dirt. If dirt accumulates, remove the shrouding, clean the fins and vanes, and reinstall
d. Fuel System. Fill the truck fuel tank at the end of each day's operation to prevent vapor lock.
38. Operation Under Sandy or Dusty Conditions
a. General. Because dust and sand are highly abrasive, careful maintenance is required.