Peato40
Well-Known Forum User
Hello All,
With my ongoing restoration of a 260z 2+2 I turned my attention to bleeding the brakes yesterday. Everything is new with the exception of the warning switch and proportional valve.
Front brakes bled up nicely, but I wasn't getting anything at the rears. I followed some advice online about first bleeding the master cylinder, which seemed to be successful.
So I disconnected the hard line going into the proportional valve and immediately found oil, so connected it back up again. I then disconnected the outlet of the valve and found it to be dry. At this point I decided to take a look inside, so dismounted the valve and opened it up and found everything to appear in good order, however I was struggling to understand exactly how it should work. It seemed to me that there needed to be pressure in the front line to then allow passage of oil to the rears but then this doesn't make sense if there was a front pressure failure because rear would then the be lost also.
Is there a trick I'm missing here?
Another option I have is the bypass the valve for the front and then put in a new adjustable valve in the rear line, which I guess I will need when I eventually get around to rear disc conversion.
With my ongoing restoration of a 260z 2+2 I turned my attention to bleeding the brakes yesterday. Everything is new with the exception of the warning switch and proportional valve.
Front brakes bled up nicely, but I wasn't getting anything at the rears. I followed some advice online about first bleeding the master cylinder, which seemed to be successful.
So I disconnected the hard line going into the proportional valve and immediately found oil, so connected it back up again. I then disconnected the outlet of the valve and found it to be dry. At this point I decided to take a look inside, so dismounted the valve and opened it up and found everything to appear in good order, however I was struggling to understand exactly how it should work. It seemed to me that there needed to be pressure in the front line to then allow passage of oil to the rears but then this doesn't make sense if there was a front pressure failure because rear would then the be lost also.
Is there a trick I'm missing here?
Another option I have is the bypass the valve for the front and then put in a new adjustable valve in the rear line, which I guess I will need when I eventually get around to rear disc conversion.