Husqvarna TE 250 - 310 2011 I.E. Workshop Manual page 228

FRONT SUSPENSION
Remove the retaining ring using a flat head screwdriver.
Pull the inner tube until separating it from the outer tube.
Note: to facilitate removal, quickly (but carefully) pump the tubes back and forth
until separating them.
Remove the sealing rings and the metal rings mounted on the inner tube.
Do not reuse any metal parts after removal.
Replace them with new components.
Replace damaged sealing rings.
Washer and retaining ring may be reused if they are not damaged.
Check the rebound adjuster rod for distortion or damage.
Replace as required.
Loosen and remove the bottom valve assembly.
Replace damaged O-rings.
Replace the complete assembly (do not reuse it).
I.22
Ed. 07-2010