Yamaha NAVIGO Owner's Manual page 40

(3) Parking brakes
Check to make sure that the park-
ing brakes are applied.
Push the wheelchair with the
brakes applied on both wheels to
ensure that the tires do not move.
Check the parking brakes to en-
sure that they do not wobble.
(4) Wheels
Check the wheels to ensure that
they are not deformed or dam-
aged.
Check the area where the wheel
meets the frame to ensure that it
does not wobble.
3
Check the spokes to ensure that
they are not broken.
In case of the detachable units,
make sure that the axle stopper
balls are visible and that the axle
shafts are securely locked so that
the units will not come off.
● If the wheels are not installed properly, they might come off during riding. Before using the
wheelchair, make sure that the wheels do not come off.
(5) Casters
Check to ensure that there is tire depth.
Check the tires to ensure that they are not damaged.
Check the caster forks to ensure that there are no cracks in them.
Check the nuts to ensure that they are not loose.
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Wheel
Spokes
WARNING
Parking brake
(example)
Wheel
Caster
Caster fork
Axle stopper ball