61Service Manual – SC900 34 - Scrub System, Cylindrical
Troubleshooting
Scrub System, General
One of the rst things about troubleshooting any part of the scrub system, is to make the scrub system
active, so you can make observations. It is possible to active the scrub system without the machine moving,
and without the brushes contacting the oor.
1. To avoid getting water on the oor, you may wish to close
the solution shutoff valve. If the machine is equipped
with EcoFlex, remove the suction hose from the detergent
bottle.
2. If you need to inspect the solution solenoid, rotate the top
of the solenoid counterclockwise about 1/8-turn, and lift
the solenoid body (A) out of the valve body (B). Take care
to not lose the plunger (C), spring, or sealing washer.
3. Set the speed limit dial to zero speed.
4. Carefully position the scrub deck lever (D) out of
its retracted slot, but resting on the adjacent tab
(E). This should permit the switch (F) to close
without lowering the scrub deck.
CAUTION: Always be prepared for the scrub
deck to unexpectedly drop. Keep
hands and feet away from the
scrub deck when it is raised in
this manner.
5. If the machine is equipped with the EcoFlex
system, set both detergent and solution ow
rates to maximum.
6. Turn the key switch to the on position.
7. Press one of the Go switches to conrm that the machine won’t move. If the machine doesn’t move, you
can tape the switch down or have an assistant hold it for you.
CAUTION: Make sure the Go switch can be released quickly in the event the machine starts to
move.
8. To examine the function of the solution solenoid, hold the plunger (C) as shown above, but not all the
way into the solenoid body (A). The plunger should be pulled into the solenoid when the solenoid is
active. For an EcoFlex machine, this will happen every second or two, and then release.
9. To examine the detergent pump, you should be able to hear or feel the detergent pump cycling a couple
of times a second (at max ow).
B
A
C
D
F
E
To Next Page
Loading...
Need help?
General
