31
HARDI
®
N-SERIES 3-PT SPRAYER DIAPHRAGM OPERATOR'S MANUAL
Adjustment of Pressure Equalization
Note: Adjust the constant boom section pressure one section at a time
as follows: (Start with the valve turned closed before adjusting).
9. Place the fi rst boom distribution valve lever 3 (Fig. 21) in the OFF
position B.
10. Turn the adjusting screw 5 (Fig. 21) until the pressure gauge 6
(Fig. 21) again shows the same pressure as in step 8 (Turn the
screw clockwise for higher pressure, counter clockwise for lower
pressure).
11. Turn the boom distribution valve lever 3 (Fig. 21) back to the ON
position A.
12. Repeat steps 9 through 11 for the remaining boom section valves.
Note: Hereafter adjustment of the constant boom pressure will only be
needed if you change to nozzles with other capacities, but not
required if only changing pressure or application rate using the
same nozzles.
Operating the Control Unit while driving
13. In order to shut off the entire boom, turn the ON/OFF handle 2 (Fig.
21) to OFF position B. This returns the pump output to the tank
through the return system. The diaphragm anti-drip valves ensure
instantaneous closing of all nozzles.
In order to shut off one or more boom sections, turn the boom
distribution lever(s) 3 (Fig. 21) of the unneeded boom section(s)
to OFF position B. The constant pressure device ensures that
the pressure does not increase in the section(s) which are still
operating.
