34
HARDI
MEGA 230 / 350 CENTRIFUGAL OPERATORS MANUAL
6.8 Operation of the ESC- Controls (cont'd)
(Fig. 20,21)
1. Choose the correct nozzle (Section 6.15). Make sure that all the
nozzles are the same type and capacity.
2. Put the tractor in neutral and adjust the P.T.O. RPM's until the number
of revolutions of the pump corresponds to the intended traveling
speed. Remember the number of revolutions on the P.T.O. must be
kept between 300-600 rpm.
3. Open or close knob 5 depending on whether pressure agitation is
required. (Remember pressure agitation takes 5% to 10% of pump
output).
4. On-off switch
A
is "ON" against green dot.
5. All distribution valves switch
B
are also "ON" against green dot.
6. Hold pressure regulating switch
C
to the (-) until handle
3
, stops
rotating, this will be the "minimum pressure" setting.
7. Hold pressure regulating switch
D (+)
until desired pressure is shown
on the pressure gauge.
Note:
Adjust the constant distribution boom pressure one section at a
time as follows: (Start with the valve turned closed before adjusting).
8. Shut-off the first boom distribution valve switch
B
. (Fig. 21)
9. Turn the adjusting screw
1
until the control unit pressure gauge (
7
)
again shows the same pressure as set in step 6 above. (Turn the
screw clockwise for higher pressure, counterclockwise for lower
pressure).
10. Turn the first boom distribution valve switch
B
back on.
11. Repeat steps 7 through 9 for the two remaining boom distribution
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.
12. Operating the control unit while driving: In order to shut off the entire
boom activate on-off switch
A
(Fig. 21). This returns all the pump
outputs to the tank through the return system. The diaphragm anti-
drip valves ensures instantaneous closing of all nozzles.
