Wheel System, Traction 124Service Manual – SC500
Drive System Gear Motor Current Draw Test
Warning! This procedure must be performed by qualied personnel only and with the help of
an assistant.
1. Drive the machine on a level oor.
2. Use a suitable chock to raise one side of the machine approximately 2cm from the oor and allow one
drive wheel to turn freely.
3. Lift the recovery tank.
Warning! Pay attention to the rotation of the driving wheel when performing the following
steps.
4. Apply the amp clamp on the positive cable (red) of the battery wiring harness.
5. Turn on the machine and activate forward drive at maximum speed via the paddle, checking that the
current draw falls within the following values:
– Between 3 and 7A at 24V for AMER gear motor
– Between 4 and 8A at 24V for TEKNO gear motor.
6. Release the paddle.
7. Switch off the machine and remove the amperometric clamp.
8. 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 (see the procedure in the relevant paragraph).
◦ If necessary, disassemble the motor (see the procedure in the relevant paragraph), and check the
condition of all its components.
9. If the above-mentioned procedures do not lead to a correct amperage, the gearmotor must be replaced
(see the procedure in the relevant paragraph).
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