Hisun HS294-2 Owner's/Operator's Manual page 73

Hitch coupling device
12-73
⚫
Be sure to refit the cower with the arrow (on
the rear of cower ) upright if the cover is
improperly fitted the evacuator valve will
not function and dust will adhere to the
element.
◆ Evacuator Valve
Open the air cleaner cover once a week under
ordinary conditions –or daily when used in a
dusty place-to get rid of large particles of dust
and dirt.