Husqvarna TE 250-310 2012 I.E. Workshop Manual page 197

ENGINE REASSEMBLY
TE 250 - 310 2012 I.E. / TE 250 - 310 2012 I.E. USA
TC 250 2012 - TC 250 2012 I.E. USA
TXC 250 - 310 2012 I.E. USA
Place a dummy gear (8) or an aluminium shim between clutch housing (7) gear
and double gear (4), and then tighten the primary drive shaft nut (9) (use a 22
mm wrench, 100 Nm, 10 Kgm, 72.50 ft/lb).
Workshop Manual Ed. 12-2011
H.35