ktmguy
Post missing.
Only 2 ways of doing it.
Try to open a suitable size hose clamp and fit it round the hose and push together and do up again.
Using a socket with ratchet or screwdriver handle prevents stabbing yourself in the hand if you use a screwdriver.
If it doesn't work try making a bit more space by taking things off as the last option is draining, pulling the hose off , fit and refill and purge.
You don't really want to go that last option......