Wheels, Drive System 122
Service Manual – Scrubtec R 253 - RA40
Drive System Gearmotor Amperage Test
Warning! This procedure must be performed by qualified personnel only and with the help of
an assistant.
1
Drive the machine on a level floor.
2 Lift the recovery tank assembly and the driver’s seat
3 Apply a jumper wire (A, Figure 6) on the driver’s seat sensor connector to disable the system
4 Disassemble the electronic component compartment cover and the function electronic board panel
5
Place a suitable lifting device (B) to raise one side of the machine approximately 2 cm from the floor (C)
and allow one driving wheel to turn freely
Warning! Pay attention to the rotation of the driving wheel when performing the following
steps.
6 Apply the amp clamp (D) on one (black) cable (E) of the drive system motor wiring harness
7 Turn on the machine and drive it at the maximum forward speed by pressing the drive pedal and check
that the amperage is 3 - 7A at 24V
8 Release the drive pedal
9 Switch off the machine and remove the amp clamp (D)
10 If the amperage is higher, perform the following procedures to detect and correct the abnormal
amperage:
◦
Check if there is dust or debris preventing the wheel rotation
◦
If necessary, check the motor carbon brushes;
◦
If necessary, disassemble the motor and check the condition of all its components
11 If the above-mentioned procedures do not produce the correct readings for the gearmotor amperage, the
gearmotor must be replaced
Figure 6
C
E
A
B
D
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