Originally Posted by
OZHCR32
I need to get my head around how the Sierras work. It feels as though in a traditional vacuum assisted setup that the check valve is playing up. How that equates to the Sierras setup. Well thats what i need to figure out.
So traditionally the pump flogging out gives a hard pedal?
That is only an assumption, it may be the other way around. See if the earth changes it.
I do have 2 spare pumps here in the UK, they sell for around £100 each normally.