Bleed them early & often. Just do it again, this time
with feeling!. Someone mentioned opening the bleeder
fully, good advice, also the MC bleeding, even by
loosening the connection. Speed bleeders may be a
good investment once you have the air out. They will
probably firm up, but it takes several tries, (at
least mine did when I blew out the entire system and
changed all wheel & master Cyls last winter. BTW, I
have great brakes now, that I can trust. Good
feeling!
Mike Harper
'66 1600
'68 2000
Charleston SC
--- William Schairer <wschaibe@ucsd.edu> wrote:
> --
> So I have been doing a lot of reading of datsun
> email but this is my
> first request for help.
>
> I had my roadster up on jackstands to replace the
> slave cylinder so I
> decided I would go ahead replace the master
> cylinder, since the slave
> cylinder was so easy.
>
> I was also going to replace the flexible brake lines
> while I was at
> it. I couldn't loosen a couple and couldn't really
> figure out how to
> get them off anyway so I decided to let that job
> wait for another
> day. I did have to undo a couple lines on the front
> left wheel in
> order to get some vice grips on the bleeder valve
> that was stuck.
> When I put it all back together I couldn't seem to
> keep one line from
> leaking where it tied into the brake cylinder. It
> finally seemed to
> stop leaking so I set forth on the task of bleeding
> the system.
>
> First I bled the new master cylinder. Then I bled
> rear right, rear
> left, front right and finally front left. When all
> done the pedal
> goes to the floor and the brake failure light comes
> on. The rear
> brakes lock up but nothing up front. More
> bleeding...still no brakes
> up front.
>
> At this point I decided the new master cylinder
> wasn't functioning
> properly (a friend of mine who is a power wagon nut
> had told me he
> has problems with new parts far too frequently).
> So, I took out the
> new master cylinder, cleaned up the old one and
> reinstalled it.
> Re-bled everything. Still no front brakes. Checked
> Chiltons trouble
> shooting sections and it says one reason the brake
> light will glow is
> due to "failure to center combination valve or
> proportioning valve."
> I figure I have solved my problem because I never
> "centered" anything.
>
> Go to the brake section and it says nothing about
> centering the
> proportioning valve and in fact says that it can't
> be adjusted. If
> it isn't working it has to be replaced. I called my
> power wagon
> friend and he has no idea except that I must have
> air trapped in the
> system somewhere. So I bleed again. Still nothing
> up front.
>
> So what happened? Did I mess something up or did I
> just get lucky
> that they failed on the stands instead of on the
> freeway? I
> desperately want to get this thing going again as it
> has already been
> down a couple months with a blown head gasket which
> I think I finally
> got fixed. Coolant has been staying put for the
> first time since I
> got the car and the temperature seems to holding ok.
> Want to get the
> brakes working so I can make the Palomar run.
>
> Thanks,
>
> Bill
> 70 1600
> san diego
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