Sweep System, Main 388Service Manual – CS7000
Problem Cause Correction
The broom lift actuator
is not raising and
lowering the main
broom.
No voltage to the main broom
actuator.
1. Check the wiring and connectors from the A1
Main Machine Controller to the main broom
actuator motor and repair as necessary.
2. Check the operation of the broom lift actuator
motor (M21). If the motor doesn’t operate
correctly, replace the broom lift actuator.
3. Check the voltage outputs from J3-3 and J2-4 on
the A1 Main Machine Controller.
The main broom is
not moving to the
previous position
when the sweep
system is enabled.
The potentiometer
R4 in the
broom lift actuator is not
operating correctly.
1. Check the voltage output from J7-34 to ground
as the broom lift actuator raises and lowers the
broom. The voltage should vary from 0 (full up
position) to approximately 3.3 VDC (full down
position).
2. If the voltages are not in the 0 to 3.3 volt range,
replace the broom lift actuator.
There is no voltage from the
A1 Main Machine Controller to
potentiometer
R4.
Check the output from J7-33 on the A1 Main Machine
Controller.
Removal and Installation
Warning! Before removing or reinstalling any machine components, make sure the key switch
is off, the key is removed from the machine and the parking brake is engaged.
To Remove the Main Broom
1. Make sure the main broom is in the raised position.
2. Lift up the Latch and swing open the
Broom Door.
Latch
Broom
Door
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