Husqvarna TC 450 Workshop Manual page 91

GENERAL OPERATIONS
TE, TC, TXC: use an 8 mm T-wrench outside and a 10 mm T-wrench inside to
remove the fastening screw (1) of silencer (4). Remove the spring (2) and use
1
an 8 mm T-wrench to remove also the screw (3); then extract the silencer (4).
4
2
3
4
Part. N. 8000 H1344 (10-2009) E.21