Yamaha NAVIGO Owner's Manual page 95

 Install the battery.
● When a person is sitting in the wheelchair, do not remove or install the wheels. The person
riding in the wheelchair or people around the wheelchair may get injured.
● After the power units are installed to the frame, be sure to check that the balls on the end
of each axle can be seen, and that the units will not come off if pulled. If the axles are not
secured, the axles could suddenly come off while the wheelchair is traveling and the wheel-
chair could tip over, causing serious injury.
WARNING
Click!
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