Segway FUGLEMAN SGW1000F-U2 Owner's Manual page 145

MAINTENANCE AND STORAGE
!
WARNING
When assembling the air filter element, make sure that the buckles of
the filter element and the cover are in place; otherwise it will cause the
engine to malfunction or reduce service life.
When the vehicle is operated in a dusty environment, please shorten
the time interval for checking the filter element.
The air filter is soaked or the filter element is wet, please drain the
water and replace the filter element.
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