Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Spray System Operation<br />
The <strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D spray system uses a positive displacement<br />
diaphragm pump to move spray solution<br />
from the spray tank to the boom nozzles. The spray<br />
pump is self–priming and has a dry crankcase.<br />
The downward stroke of the pumps’ two connecting<br />
rods and diaphragms create suction to allow fluid to be<br />
drawn from the spray tank to the pump via the suction<br />
tube, suction strainer, hoses, and connectors. A suction<br />
dampener placed in the suction line dampens suction<br />
pulses to smooth suction flow. Suction valves positioned<br />
in the pump valve chamber prevent fluid from being<br />
pumped back into the suction line. Leaks in the suction<br />
line will cause system problems and often will be indicated<br />
by erratic suction line jumping and excessive<br />
pump noise.<br />
Once to the pump, the fluid is pushed by the upward<br />
stroke of the pumps’ two connecting rods and diaphragms<br />
to the pressure side of the spray system<br />
through hoses, connectors, control valves, and spray<br />
nozzles. A pressure dampener at the pump outlet<br />
smooths system pressure pulsation. Pressure valves<br />
positioned in the pump head prevent fluid from being<br />
drawn back into the pump. Maximum pressure in the<br />
system is limited by a pressure relief valve located in the<br />
tank. A pressure gauge on the dash panel indicates<br />
spray system pressure.<br />
Battery current for spray system fuses, switches, valve<br />
motors, and other components is provided by the accessory<br />
solenoid when the machine ignition switch is in the<br />
RUN position. For spray system electrical component<br />
information and test procedures, see Chapter 5 – Electrical<br />
System.<br />
The machine operator controls the spray system on the<br />
<strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D with electrical switches located on the<br />
spray console. Switches include a spray pump on/off<br />
switch, an application rate (increase/decrease) switch,<br />
an agitation control switch and three boom control<br />
switches. These switches control the PWM Valve, the<br />
agitation control valve and three boom control valves.<br />
Additionally, a master (foot) boom valve switch allows<br />
the operator to turn off/on all three boom sections.<br />
The spray pump is directly coupled to and driven by a hydraulic<br />
motor. Flow from the hydraulic gear pump to the<br />
motor is controlled by the Pulse Width Modulated<br />
(PWM) Valve. Based on available current (mA) from the<br />
spray pump application rate (increase/decrease)<br />
switch, the PWM spool valve directs gear pump flow to<br />
the spray pump hydraulic motor. This hydraulic flow<br />
causes the motor to rotate the spray system pump for<br />
spray system operation.<br />
When the spray pump is on, application rate (increase/<br />
decrease) switches allow the operator to adjust electrical<br />
current to the PWM Valve solenoid. Higher current<br />
(rate increase) to the PWM solenoid increases hydraulic<br />
flow to the spray pump motor and results in a higher<br />
spray pump speed with more output/pressure. Lower<br />
current (rate decrease) to the PWM solenoid decreases<br />
hydraulic flow to the spray pump motor and results in a<br />
lower spray pump speed with less output/pressure. Desired<br />
spray pump pressure should be based on boom<br />
nozzle selection and ground speed (see Nozzle Selection<br />
Guide (<strong>Toro</strong> Form No. 3351–389) for information regarding<br />
boom nozzle selection).<br />
When the agitation switch is ON, the switch light is illuminated<br />
and the agitation control valve is opened. This<br />
open valve directs system flow to three agitation nozzles<br />
in the spray tank. When the agitation switch is OFF, the<br />
agitation control valve is closed so no flow is available<br />
for tank agitation nozzles.<br />
When a boom control switch (left, center or right) is ON,<br />
the switch light is illuminated and the boom control valve<br />
for that boom is opened. This open valve directs system<br />
flow to the spray nozzles located on the boom section.<br />
When a boom control switch is OFF, the boom control<br />
valve is closed so no flow is available to that spray boom.<br />
A manually adjustable boom bypass valve is incorporated<br />
in each of the boom control valves. <strong>Pro</strong>per adjustment<br />
of the boom bypass valves prevents system<br />
pressure changes when a boom section is shut off. Flow<br />
from the boom bypass valves is directed back to the tank<br />
(boom bypass).<br />
An optional <strong>Pro</strong> Control Spray System is available for<br />
the <strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D. This system includes a console<br />
computer and an inline flowmeter to control the spray<br />
pressure system. The flowmeter is positioned in the<br />
pressure side of the spray system directly before the<br />
boom control valves. The flowmeter measures spray<br />
boom flow. The <strong>Pro</strong> Control computer determines system<br />
application rate based on operator programming<br />
and inputs from the flowmeter and the ground speed<br />
sensor located in the right rear wheel motor. Additional<br />
<strong>Pro</strong> Control information can be found in the <strong>Pro</strong> Control<br />
Spray System Operator’s Manual.<br />
NOTE: When a vehicle is equipped with the optional<br />
<strong>Pro</strong> Control Spray System, the balancing valves on all<br />
boom valve motors must be fully closed.<br />
Spray<br />
System<br />
<strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D Page 6 – 5 Spray System
Change language