Scrub System
84
Service Manual – SC1500
Scrub Deck at Normal Scrub Pressure
When the Scrub System is active, the
Gang Switch
in the
A1 Control Board
switches on the power to the
Brush Lift
Actuator Motor M3
. The
Deck Actuator
Assembly
lowers the scrub deck to the
normal scrub pressure position,
POS
(position)
2
When the deck reaches
POS
2
the
Cam
closes the
S6 POS 2
switch, which
drops the voltage seen at the
Act.
Position 2
input from 5v to 0v. The
A1
Control Board
then shuts off the power
to the
Brush Lift Actuator Motor
Scrub Deck at Extra Scrub Pressure
When the Scrub System is active and
either the Extra Pressure Switch or
Burst of Power switch is pressed, the
Gang Switch
in the
A1 Control Board
switches on the power to the
Brush
Lift Actuator Motor.
The
Deck Actuator
Assembly
lowers the scrub deck to the
extra scrub pressure position.
When the deck reaches its lower travel
limit, the
Cam
opens the
Lower Limit
Switch
. This shuts off the power to the
Brush Lift Actuator Motor
M
+5V
B-
J2-11
+5V
J2-12
J1-8
B+
B-
B-
B+
S7 POS 1
S6 POS 2
Upper
Limit
Switch
Cam
Lower
Limit
Switch
A1
Control Board
Deck Actuator Assembly
F BLK/WHT
C RED/VIO
D YEL/BLK
Act. Position 2 (0v)
Act. Position 1
Brush Lift
Actuator
Motor M3
Gang
Switch
M
+5V
B-
J2-11
+5V
J2-12
J1-8
B+
B-
B-
B+
Brush Lift
Actuator
Motor M3
S7 POS 1
S6 POS 2
Upper
Limit
Switch
Cam
Lower
Limit
Switch
A1
Control Board
Deck Actuator Assembly
F BLK/WHT
C RED/VIO
D YEL/BLK
Act. Position 2
Act. Position 1
Gang
Switch