Air Filter - Husqvarna K770 Workshop Manual

6. Attach the screw press in the center.
7. Lock the outer socket with a wrench and tighten the
center screw until the flywheel releases.
Note: If the flywheel is not easy to remove, hit the
center screw with a hammer. At the same time, lift
the product with the handle of the flywheel puller.
6.3.2 To examine the seat and key
The key in the flywheel can not be replaced. If the key is
damaged the flywheel must be replaced. For a correct
ignition point, the position of the flywheel must align with
the position of the crankshaft. The force of the center nut
is not sufficient to hold the flywheel in the right position.
32 - Repair and servicing
6.3.3 To assemble the flywheel
The crankshaft and the center of the flywheel must be
free from grease. Tightening torque 18–22 lbf·ft /25–30
Nm. Use a torque wrench to tighten the nut.
1. Align the key in the flywheel with the keyway on the
crankshaft. Install the washer and nut.
2. Remove the tool and put the springs on the start
hooks.

6.4 Air filter

6.4.1 Function
The centrifugal cleaning is the first step in the air
cleaning of the inlet air. The blades on the flywheel
supply the cylinder with cool air. This is shown with large
arrows in the illustration. The blades are also the part in
operation on the centrifugal cleaning of the inlet air of
the engine. An inlet tube is installed near the blades on
the flywheel. The centrifugal force prevents large
particles to follow the air to the inlet tube. They are
moved out, past the tube. Only small dust particles
follow the air to the inlet.
6.4.2 To replace the air filter
CAUTION: Be careful when the air filter is
removed. Dust particles must not fall down in
the carburetor inlet. Removal of waste is best
done with a vacuum cleaner.
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