Husqvarna K 770 Dry Cut Manuel D'utilisation page 120

Dust collection equipment
The product has a blade guard, a blade guard extender,
a dust shield, an on-board fan and a dust bag that
collect dust during operation.
To assemble the dust bag and vacuum hoses
1. Attach the clip on the hose connector to the loop on
the handle of the product.
2. Push the extension hose onto the open end of the
hose connector. Push until the end of the extension
hose touches the end stop of the hose connector.
3. Push the extension hose into the dust bag inlet.
Push until the extension hose has entered the inlet
of the check valve and all the way to the bottom end
stop of the check valve (about 45 mm in to the check
valve).
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4. Attach the rope to the extension hose near the dust
bag inlet.
To examine the dust equipment
1. Make sure that the dust equipment is correctly
attached and not damaged.
2. Make sure that there are no holes on the hose or
dust bag.
3. Do a test of the dust equipment before you start the
cutting operation. The dust bag inflates when the
equipment operates correctly.
To remove the dust bag
WARNING: Put on protective glasses,
gloves and approved respiratory protection.
Do not open the dust bag unless it is in a
garbage bag. Dust can spill into the air when
the operator removes and cleans the dust
bag.
1. Loosen the hose clip and the rope.
2. Remove the dust bag from the hose.
3. Attach the rope to the dust bag to seal it.
To do an inspection of the check valve
1. Make sure that the lid of the check valve is fully in
the dust bag inlet.
2. Make sure that the top of the check valve lid points
up. The top of the check valve lid is at the 2 screws.
3. Make sure that the bottom of the check valve aligns
with the seam of the dust bag inlet.
Note: If the check valve is assembled correctly, the
check valve lid opens only when the fan is on. When the
fan is off, gravity closes the check valve lid. If the check
valve is assembled incorrectly, the check valve can
open although the fan is off.
861 - 004 - 27.02.2019