With reference to the question at the top of this page set by myself "Muiris" The type of springbrake chamber fitted to my Daf 45 is indeed very easily serviced. There is no danger when dismanteling from a heavily loaded sping. Its only when the device is dismantled will you see where the danger is. Internaly there is a large piston and con rod under tension by the spring. This does not need to be dismantled, and this where the danger would be.
Once dismantled you will see 2 rubber "O" rings and it is these that need to be replaced. The rubber rings can be replaced by buying the rubber by the foot and a superglue joint. Having done this repair with 100
Muiris
August 2012