Brush Motor Amperage Check - Nilfisk-Advance R 253 9087362020 Service Manual

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
brush deck
8 Apply the amp clamp (C) to an electrical cable
(D) of the brush motor
A
Figure 6
(*) Voltage value supplied by the electronic board to the brush gearmotor when the gearmotor amperage is
less than the value of the RPM parameter
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:
◦
◦
13 If the above-mentioned procedures do not lead to
to lower the
a correct amperage, it is necessary to replace the
brush motor
B
Note: Use a jumper wire to disable
the driver's seat sensor.
Check the brush motor carbon brushes
Remove the brush motor then check the con-
dition of its components
C
Scrub System, Disc 85
D