Driving Wheel System 122
Service Manual – SC3000
Drive system motor electrical input check
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. Apply proper wedges to rear wheels, so that the machine cannot move when the front wheel is lifted.
3. Slightly lift the front part of the machine and apply to the frame brackets two proper wooden shims high
enough to keep the front wheel lifted for about 2 cm from the floor.
Warning! Pay attention to the rotation of the driving wheel when performing the following
steps.
4. Use a jumper wire to disable the driver's seat microswitch.
5. Apply the amp clamp pliers on the positive cable (red) of the battery wiring harness.
6. Turn the ignition key to “I”.
7. Drive the machine at the maximum forward speed by pressing the pedal and check that the electrical
input is 5 - 7 A at 24 V. Release the pedal. Turn the ignition key to “0” and remove the amp clamp pliers.
8. If the electrical input is higher, perform the following procedures to detect and correct the abnormal
input:
◦
Check if there is dust or debris preventing the wheel rotation.
◦
If necessary, check if the electromagnetic brake slows down the wheel when the drive system motor is
operating (remove the electromagnetic brake and repeat the electrical input check (see the procedure
in the relevant paragraph)).
◦
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 electrical input, the motor must be replaced
(see the procedure in the relevant paragraph).
