Husqvarna FC 450 2018 Repair Manual page 163

Disconnect plug-in connector
48.
Push back protection cap
Unplug the connector.
4D.
Loosen hose clip
Pull the radiator hose.
off
48.
Loosen hose clips
Pull the radiator hoses.
off
Disconnect spark plug connector �.
ENGINE 17
48.
161