K ,many thanks for your reply. today I took up the slack on the cables by just 1cm, applied the parking brake ,realised I had nothing and found on inspection the nearside cable had sheared inside the drum at a point where the cable seemed very worn, The truck had been standing for some months, I think that yesterday while stopping on a hill the cable finally died but didn,t break completely hence the 50% effective breaking I was experiencing. Does my analysis seem reasonable ??? I,m presently stuck in sw france with the lorry , I,ve ordered today a new cable.
simon jones, April 2010