vexing brake pedal travel problem
Posted: Mon Aug 28, 2017 9:08 pm
Hello,
I'm getting close to "finishing" my plus 2. I have driven a few km already and I can now concentrate on the set-up. It turns out the brake pedal travel is to too long. It takes about 6cm of travel until the brakes start to bite.
It does not feel mushy. The pedal just travels freely with no resistance until it starts to feel firm and comfortable.
I checked on the pedal side. The tandem master cylinder looks good (it has been installed new about 10y ago when the previous owner got the car registered in Switzerland from the single M/C UK system). No leak. There is no play in the pushrod. The piston starts to move back as soon as the pedal is activated. The servos look new. They also have been installed new 10y ago and still look bright and shiny. I rotated them the way they should according to what I know.
I have now purged the system twice "by hand" without improvement. I'll try another time tomorrow with a "machine" that put air pressure on top of the M/C tank just to be sure but I doubt there is air in the system because the feel is firm. Just too long a free travel before it happens.
I should say that I have replaced the brake caliper seals and bellows. They have seen no use but I have installed them in 2012.
Thanks for your help
Fran?ois
I'm getting close to "finishing" my plus 2. I have driven a few km already and I can now concentrate on the set-up. It turns out the brake pedal travel is to too long. It takes about 6cm of travel until the brakes start to bite.
It does not feel mushy. The pedal just travels freely with no resistance until it starts to feel firm and comfortable.
I checked on the pedal side. The tandem master cylinder looks good (it has been installed new about 10y ago when the previous owner got the car registered in Switzerland from the single M/C UK system). No leak. There is no play in the pushrod. The piston starts to move back as soon as the pedal is activated. The servos look new. They also have been installed new 10y ago and still look bright and shiny. I rotated them the way they should according to what I know.
I have now purged the system twice "by hand" without improvement. I'll try another time tomorrow with a "machine" that put air pressure on top of the M/C tank just to be sure but I doubt there is air in the system because the feel is firm. Just too long a free travel before it happens.
I should say that I have replaced the brake caliper seals and bellows. They have seen no use but I have installed them in 2012.
Thanks for your help
Fran?ois