Easy job, even without correct specific tools.
Cut the hose off, at the end of the barb. Using pliers the O clip will just angle off and then re thread hose and a couple of new O clips or jubilee clips on and jobs a good en. Wind back in or even easier with an electric reel.
Had to do this whilst out at work, when i first started with hot water. All the fastenings needed tightening but i didnt realise that till i sprung some leaks. But it was done n dusted un about 15 or 20 mins.