Air Filter - Husqvarna K770 Workshop Manual

6. Put the screw press in the center and tighten it
sufficient to make sure it is attached.
7. Lock the outer socket with a wrench and tighten the
center screw until the flywheel releases.
Note: If the flywheel is tight you can release
it by using a hammer on the center screw.
At the same time, lift the product with the
tool handle.
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.
28 - 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
supplies the cylinder with cool air (large arrows). They
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
stops large particles to follow the air to the inlet tube.
They are moved out, past the tube. Only small dust
particles will follow the air to the inlet.
The inlet tube must be examined and cleaned in
connection with filter replacement. Blow clean dust from
dry cutting with compressed air. Material from wet
cutting must be removed mechanically. Make sure the
651 - 001 - 27.06.2018