Husqvarna DT22 Operator's Manual page 31

Replacing worn flail blades
1. Allow the engine to cool.
2. Disconnect the spark plug.
3. Tip the machine forward; see the section
"Two minute rule".
IMPORTANT INFORMATION
When tipping the machine forward
observe the "Two minute rule".
4. Remove and dispose of the spring clips (1)
(locking washer type) that hold the blade
shaft (2) in place (see the
illustration).
5. Inspect the blade shafts and replace if bent
or worn.
6. Drive the blade shafts out towards the
center. The blades (4) and the plasitc
spacers (3) will fall off.
7. Fit the new blades and replace the plastic
spacers as necessary. Refer to the
illustration of the components for blade/
spacer placement.
8. Install new spring clips.
9. Repeat this procedure for the remaining
three shafts.
10. Reattach the spark plug cable.
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