Husqvarna TC 250 2010 Workshop Manual page 217

Install the crankcase (8) and tighten the screws (9) following a cross pattern
(use an 8 mm wrench , 10 Nm, 1.0 Kgm, 7.25 ft/lb). Make sure pump gear and
drive gear engage correctly.
Check the O-ring (10) for damage and replace it if needed.
Refit the spring (11) of the oil filter (12).
Refit the oil filter into its housing and tighten the screws (13) using an 8 mm
wrench (5.5 Nm, 0.55 Kgm, 3.98 ft/lb).
WARNING: When assembling filter to cover, make sure to fit the filter
oil seal (A) first onto the cover (6).
Part. N. 8000 H1489 (10-2009)
ENGINE REASSEMBLY
H.55