4-30 4181383 First Edition
ELECTRICAL
4
Raise/Lower Circuit—Theory of
Operation
Power Circuit
Unswitched power is available from the battery positive
terminal to the starting motor battery terminal and then
from the starting motor battery terminal to 50 amp
thermal circuit breaker battery terminal.
Unswitched power is available from 50 amp thermal
circuit breaker battery terminal to key switch terminal A
and control module terminals J3-6.
When the key switch is turned to the run position, voltage
is provided from key switch terminal B to control module
switch power input terminal J3-2, powering up the control
module and energizing the internal switched power relay.
Voltage is also provided from key switch terminal B to
control module select 2 input terminal J4-2, activating the
input. With the select 2 input activated, the control
module selects the software program for this machine.
This allows the control module to be used in more than
one machine.
With the internal switched power relay energized,
switched power is available from switched power relay
terminal 87 to control module terminal J3-5. Switched
power is available from control module terminal J3-5 to
splice 100. From splice 100, switched power is available
to the Hydraulic oil level switch.
Switched power is available from hydraulic oil level switch
to the seat switch and then from the seat switch to the
mow switch. Switched power is available from the mow
switch to the raise-lower switch.
Raise Circuit
When the raise/lower switch is placed in raise position,
voltage is provided from the raise switch contacts to
control module raise switch input terminal J1-11,
activating the input. With the input activated, current
flows from control module raise solenoid output terminal
J2-3 to the raise solenoid, energizing the solenoid. With
the solenoid energized, the cutting units will continue to
rise until the raise/lower switch is released, or until the
cutting units reach their end of travel.
Lower Circuit
When the raise/lower switch is placed in lower position,
voltage is provided from the lower switch contacts to
control module lower switch input terminal J1-12,
activating the input. With the input activated, current
flows from control module lower solenoid output terminal
J2-4 to the lower solenoid, energizing the solenoid. With
the solenoid energized, the cutting units are lowered. The
control module continues to energize the lower solenoid
until the raise switch is activated.
Note: While mowing the raise/lower function will be in
“one touch crosscut” mode, meaning the raise/lower lever
only needs to be tapped to move the cutting units to a
pre-determined position. When not mowing the
raise/lower lever must be held until the cutting units reach
the desired position.
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