Husqvarna TC 250 2010 Workshop Manual page 190

ENGINE REASSEMBLY
Heat up the left crankcase bearing housings and install the crankcase.
To join the crankcase halves, tap with a plastic hammer.
Tighten the screws (15) using an 8 mm wrench (10 Nm, 1Kgm, 7.25 ft/lb). Make
sure to fit the screws in the correct positions according the specified pattern (see
Section F, paragraph "Crankcase disassembly").
Cover the upper section of the engine with a cloth, a sponge or the like to prevent
screws or other parts from accidentally falling into the engine.
H.28 Part. N. 8000 H1489 (10-2009)