Toro 41188, Service Manual

Page: 323 / 353

Multi Pro 1750 Page 9 − 13 Ultra Sonic Boom Kit (Optional)
Boom Level Changed by Operator During Automatic Operation
During sprayer operation with the sonic boom switch in
the automatic position (sonic boom switch light is illumi-
nated), the boom mounted sonic boom sensors continu-
ally send impulse signals and then receive echoes as
the signals bounce off the turf. The Toro Electronic Con-
troller (TEC) determines the sensor distance from the
ground based on the time between the sensor signal
generation and the received echo. As long as the sensor
height remains the same as the calibrated height, the
spray boom will remain at a fixed distance from the
ground for spraying accuracy.
If the sprayer operator should press a boom lift switch
while in automatic operation, the TEC energizes the ap-
propriate boom lift control manifold solenoid coils. The
energized coils provide hydraulic flow from the gear
pump to the boom lift cylinder causing the cylinder to
raise or lower the boom section. The solenoids will stay
energized as long as the operator keeps the boom lift
switch pressed. The sonic boom light will flash while the
boom lift switch is being depressed. If one boom is
moved by the operator, the other boom continues to
function automatically.
If a boom is raised by the operator while the Ultra Sonic
Boom System is in automatic operation, that boom will
remain in the raised position until the boom lift switch is
pressed to lower and released which will re−engage au-
tomatic sonic boom operation on that boom section.
If a boom is lowered by the operator while the Ultra Sonic
Boom System is in automatic operation, that boom will
lower until the boom lift switch is released. The automat-
ic sonic boom operation will be re−engaged as soon as
the lift switch is released from lower.
NOTE: To re−engage automatic sonic boom operation,
the boom lift switch must be pressed to lower and re-
leased. Pressing the boom lift switch to raise will not re−
engage automatic operation.
Figure 7
TOP
P T
G
LC
S3
SH
OR
S4
S2
C2 C1 C3 C4
S5
RIGHT CYLINDER
RETRACT TO RAISE
LEFT CYLINDER
RETRACT TO RAISE
COIL
BOTTOM
COIL
TOP
COIL
BOTTOM
COIL
CONTROL
VALVE
STEERING
FROM
HYDRAULIC
RESERVOIR
FILTER AND
TO OIL
(ENERGIZED)
(ENERGIZED)
(RETRACTING)
LEFT BOOM SECTION RAISE SHOWN
Ultra Sonic
Boom (Opt.)