Husqvarna DT22 Operator's Manual page 30

Wear/Rotation/Replacing flail blades
After you have used your dethatcher for some
time, the blades will begin to wear on the
striking edge. When this happens, their
dethatching performance will diminish. A new
combing edge may be obtained by rotating the
entire rotor shaft assembly laterally (end to
end). This procedure can be repeated until the
blades reach their wear limit; see illustration.
Rotate the rotor shaft as follows:
IMPORTANT INFORMATION
Only the flail blade rotor shaft can be
rotated to achieve even wear.
Rotating the rotor shaft
1. Allow the engine to cool.
2. Disconnect the spark plug.
3. Remove the belt guard (see illustration).
4. Remove the belt guard and pulley from the
rotor shaft (see illustration).
5. Remove the 6 bearing bolts and allow the
rotor shaft to slide out.
6. Check the shaft, bearing, blade length,
blade safety clips and spacers.
7. Rotate the shaft end for end.
8. Refit the bearing bolts.
9. Refit the pulley and check that it is aligned
with top pulley.
10. Refit the drive belt.
11. Check the pulley alignment to the engine
shaft pulley. The drive belt should run
smoothly in its track. Adjust as necessary.
Tighten the pulleys.
12. Refit the belt guard.
13. Reattach the spark plug cable.
30
MAINTENANCE
A. New blade
B. Worn blade
C. After rotation
DT22> 89mm/3.5"
8011-006
8011-027
BELT COVER
DT06