Scrub System, Disc
134
Service Manual – SC6500
™
Problem
Cause
Correction
The scrub deck
actuator doesn’t
raise or lower the
scrub deck
Scrub deck actuator
overload (error code
08
displayed)
• Normal current load is 1-3
amps.
• Max current load is 6
amps.
• Max current with no load
is 1.4 amps.
1. Check for binding or a frozen brush lift linkage
and excessive weight on the brush deck.
2. Check for a short circuit in the actuator motor and
wiring. Repair or replace.
To test the actuator, disconnect the motor plug
and attach the actuator power cord adapter (p/n
56407502) and perform an amp draw test. Compare
readings to the current load specifications to the left.
Scrub deck actuator open
(error code
28
displayed)
1. Check for disconnected lift actuator wiring.
2. Check for an open circuit in the motor wiring or for
a defective motor.
3. Check for output voltage from the A2 control
board assembly at the actuator wiring plug. It
should be 36 volts. If 0 Volts, check the A2 control
board assembly.
Removal and Installation
Warning! Before removing or reinstalling any machine components, make sure the key switch
is off and the key is removed from the machine.
Scrub Brush Deck
Warning! Engage the parking brake and chock both rear wheels so the machine can’t roll.
1. Loosen the four side
skirt
Retainer Knobs
(two per side) and
remove the
Side Skirt
Assemblies
from the
deck.
2. Remove the scrub
brushes from the
brush holders.
3. Place wood blocking
(2x4) under both
outside brush drive
discs (brush holders)
and lower the deck to
the floor by pressing
the Scrub On button.
Side Skirt
Assembly
Hex
Nut (4)
Cotter
Hair Pin
Solution
Feed Hose
Scrub Deck
Actuator
Pivot
Support
Arm (4)
Retainer
Knob (4)
Retainer
Pin
ID Resistor
Plug
