Roma Medical Shoprider S-889SL Service Manual download pdf (Page 18)

12. Brake Removal And Testing

Old Type

New Type

The electromagnetic brake is located on the end of the motor and

can be removed by undoing the three screws.

When 24v is applied, the brake will release allowing the scooter to

drive (this can be heard by an audible ‘click’). If the scooter fails to

move there may be a problem with the wigwag potentiometer or the

brake itself may be faulty. Use a multimeter to determine if 24v is

reaching the brake when the throttle is applied. If there is 24v

measured at the plug and the brake fails to operate the brake is

either faulty or possibly stuck.

It is easier to diagnose brake faults when the brake is removed from

the motor as you can see the internal mechanism physically release

and lock. A brake may stick if the scooter has not been used for a

prolonged period of time. If power is reaching the brake but it does

not release check to see if there is any corrosion inside the end of the

brake (by the plate with the hexagonal hole). If necessary, use a

release agent such as WD40 to lubricate the brake and re-apply

power to try and release the brake. If the brake is releasing you will

be able to move the internal plate with the hexagonal cutout when

power is supplied. The brake should show continuity when tested

with a multimeter – if this is not the case, replace the brake.

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Roma Medical Shoprider S-889SL Service Manual Page 18