Husqvarna K770 SmartGuard, Workshop Manual

Page: 30 / 76

7. Attach the screw press in the center.
8. 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.
6.3.3 To install the flywheel
The crankshaft and the center of the flywheel must be
free from grease. Tightening torque 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 starter
pawls.
6.4 Air filter
6.4.1 Function of the air filter
The centrifugal cleaning is the first step in the process to
clean the inlet air. The blades on the flywheel supply the
cylinder with cool air. This is shown 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 in the inlet tube.
The centrifugal force pushes the large particles out
before they can go into the tube. Only small dust
particles go with 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 that
30 - Repair and servicing 1453 - 001 - 02.04.2020