Husqvarna TC 250 2010 Workshop Manual page 283

Push the floating piston quickly down to reservoir bottom while holding the rod
steady in the appropriate position for top-up. The oil inside the reservoir will flow
into the shock absorber body and fill it up to a certain level as it seeps through
the piston washers. These operations need to be performed quickly to avoid
the ingress of air.
Top up with oil up to nearly 2 cm (0.8 in.) below shock body edge. Pump the rod
up and down through 5 - 6 cm (2-2.4 in.) strokes four or five times to expel any
air trapped under the piston.
Pump slowly or the floating piston might become displaced due to cavita-
tion or compression. Top up with oil up to the circlip groove, while slowly
setting the rod so the bumper is level with the groove.
Hold the rod steady and slide the rod guide into the shock absorber cylinder.
Push the rod guide down into the body past the circlip groove. Insert the circlip
making sure it is securely in place. Pull the rod upwards to bring the rod guide
in working position.
Part. N. 8000 H1489 (10-2009)
REAR SUSPENSION
J.13