Scrub System, Disc
85
Service Manual – Scrubtec R 253 - RA40
Brush Motor Amperage Check
Warning! This procedure must be
performed by qualified
personnel only.
1
Drive the machine on a level floor.
2 Remove the brush
3 Lift the recovery tank assembly and the driver’s
seat
4 Disassemble the electronic component
compartment cover and the function electronic
board panel
5 Disconnect the drive system connector (A)
(Figure 6) on the function electronic board (B) to
disable machine movement
6 Turn the ignition key to “I”
7 Press the One-Touch button
to lower the
brush deck
8 Apply the amp clamp (C) to an electrical cable
(D) of the brush motor
Note:
Use a jumper wire to disable
the driver’s seat sensor.
9 Activate the brush by pressing the accelerator
pedal, then check that the brush motor
amperage is between 3 and 4A at 20V(*)
10 Deactivate the brush by releasing the
accelerator pedal and raise the brush deck by
pressing the One-Touch button
11 Remove the amp clamp (C)
12 If the amperage is higher, perform the following
procedures to detect and correct the abnormal
amperage:
◦
Check the brush motor carbon brushes
◦
Remove the brush motor then check the con-
dition of its components
13 If the above-mentioned procedures do not lead to
a correct amperage, it is necessary to replace the
brush motor
Figure 6
D
B
C
A
(*) Voltage value supplied by the electronic board to the brush gearmotor when the gearmotor amperage is
less than the value of the RPM parameter
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