Husqvarna DT22 Operator's Manual page 32

Wear/Replacing delta blades
Over time and due to wear, the blades will
diminish in length. Once the blades have worn
down by about
19 mm (3/4"), the overall length of the blade at
the longest point of the blade will be about 64
mm (2 1/2"), and it will be necessary to replace
the blades.
Wear/Replacing spring tines
Over time and due to wear, the tines will
diminish in length. When the tines can no
longer be adjusted to comb 6 mm (1/4") into
the soil, the tines must be replaced.
Spring tines can be replaced without removing
32
MAINTENANCE
It is possible to replace delta blades without
removing the rotor shaft. Remove the delta
blade by removing the two screws with nuts
holding the blade in place.
Turn the new blade until it is properly aligned;
see illustration.
Screws
the rotor shaft by using a 1/2" socket wrench.
Remove the screw and replace the spring tine
using the wrench. Fit the new spring tine
before removing the tine on the opposite side.
Delta Blade
Washers
Nuts
Spring
Tine
Screw