It’s the inner lining of the hose that goes and like has been said it acts as a one way valve allowing fluid to flow towards the caliper but then preventing it from flowing back towards the master cylinder thus maintaining pressure and locking the brake on.
The bike is a 2012 model. I've had it for 18 months and it only done 1800 miles when I got it. It's done almost 8000 now.
Thanks - not sure that I would have dared take the front caliper off and ride home with just the rear brake!
Took the hose off the bike this morning. No fluid came out of the caliper end but some ran out from the brake cylinder end when I turned it upside down . Looks like Yorkshireman was right but still no idea what caused it to fail.
Maybe someone bent the pipe a bit sharper than he should when the caliper was off for service or left the caliper hanging on the hose, both of which can cause failures at a later date for no apparent reason at the time. Or maybe just old age ....
Steve, what was the colour or condition of the fluid like? Do you think some silly bastard topped up the fluid with something other than brake fluid like an oil product which might have rotted the rubber? I noticed the chain has been left so whoever had it before you might not have give a shit?!
I had a similar problem on my Trophy....though it decided to put the rear brake on as I started to enter the Mersey Tunnel. Had to stop a few times to let it cool down. They don't like people stopping in the tunnel, but as I only stopped for seconds and then crept forward at 5mph they said it was quicker to let me keep going than to close the tunnel and rescue me!! Nice gentlemen! Turned out the pads had been rubbing enough to boil fluid and push the pads on more. Like you, decided to ride with no rear brake till I got home. Freed everything off...most problem was the master cylinder which had what looks like old goo around the seals. That took a few strip downs to get functional. I should mention that the bike was bought from a guy who had not used it for at least 4 years. Still all is well now. Hope your back on the road soon.
The fluid looked normal to me when it came out. Supposedly serviced each year by a Triumph dealer! Chain is better than it looks. I lube it after every fill up but the back of it got covered with mud coloured water last week and I haven't cleaned that side yet!
Disc is slightly out of true which it may have been anyway. Not taking any chances though and have ordered a new Brembo one as an upgrade over stock. Still £55 cheaper than Triumph want!
Caliper is all nice and clean, the stuck retaining pin has been drilled out and the thread has been tapped just to clear the odd bit of reluctant swarf. New Brembo disc has arrived - just waiting for the new hose and pads, which should be in the post today. Decided to order the Motone caliper relocator bracket, as the wheel has to come off anyway, so that the caliper will stay cleaner in the future hopefully.
Here we go. Wheel removed and cleaned, hubs regreased, chain and swing arm cleaned. Old bracket New bracket New things in the post! Old disc off New disc fitted Wheel back on. More later .... alcohol time now! Ps : don't buy cheap tools on Amazon!
Lkin guid. Hope you put ACF50 on them shiny new parts to keep them looking nice. That's when the wee cloth you use to apply, comes in handy for a quick wipe over swingarm, etc. ps - you could have cleaned the undertray whilst you were at it !!!
