[Roadsters] Late front brake rebuild

[Ronnie Day]

Gary,

Unfortunately no previous owner had ever removed the plastic sleeving on
the front hard lines. I'm sure that's what at least contributed to the
pinhole. Like I mentioned I think the only safe thing to do is replace all
four hardlines. Any suggestions regarding where I get them? I doubt
Autozone or even NAPA would even know what I was asking for!

As far as the rears are concerned, I did look at the diagrams in the tech
wiki on 311s.org and while it shows the mechanical adjuster on the bottom
and the wheel cylinder on top, mine are the other way around. But I don't
see how the NOS hard line I bought from Dean for the driver rear would've
have worked if what I have is incorrect. Weird!

On the later, dual M/C cars, are they set up diagonally (LF/RR & RF/LR) or
is it just front & rear? This is the first time I've worked on the front
brake of a roadster and I knew they are more fiddly than many others.

On Mon, Sep 15, 2014 at 1:41 PM, Gary and Cindy Ault <aultgc at att.net> wrote:

> Ronnie,
>
> Something doesn't sound right with your arrangement.  First of all, the
> routing of the line around the front calipers seems logical given the need
> to distribute fluid to both wheel cylinders.  As long as the lines don't
> rub the wheels, which they don't if properly installed, and the plastic
> coverings are removed so they don't corrode from the outside, they should
> never leak.  Mine never have.
>
> Secondly, there is only one bleeder valve on the two wheel cylinders, and
> it's at the top of one of the cylinders.  The arrangement of the brake
> lines around the wheel cylinders ensures that air cannot get trapped at the
> top of either cylinder.  I've never had a problem bleeding the front brakes
> with the car on jack stands (for access), and I don't make any effort to
> get the front of the car higher than the back.
>
> I bleed the M/C first, then the wheel cylinder furthest from the M/C.  On
> single M/C cars, that means a sequence of RR, LR, RF, LF.  I haven't had to
> bleed the brakes on my '67-1/2, but I suspect I'll need a RR-LF and LR-RF
> sequence, since I think each half of the M/C controls one front and one
> rear cylinder.
>
> Gary
>
>   ------------------------------
>  *From:* Ronnie Day <ronnie.day at gmail.com>
> *To:* Roadster List <datsun-roadsters at autox.team.net>
> *Sent:* Monday, September 15, 2014 11:07 AM
> *Subject:* Re: [Roadsters] Late front brake rebuild
>
> Speedblenders aren't what I was thinking. They probably won't help much
> since I have the pressure bleeder, along with a catch bottle so the system
> can't suck air back in anyway. I seem to remember something about getting
> the front of the car up to get the lines as high as possible.
>
> It seems to me that have a bleed valve on top of each side of the caliper
> would have been logical, and having the bleed valve on the bottom of the
> wheel cylinders pointing down wasn't the brightest idea, either.
>
> Just sayin'
>
> On Monday, September 15, 2014, dave n <dave at ranteer.com> wrote:
>
> > speed bleeders!!!!!  www.speedbleeder.com
> >
> >
> > -----Original Message----- From: Ronnie Day
> > Sent: Monday, September 15, 2014 8:31 AM
> > To: Roadster List
> > Subject: [Roadsters] Late front brake rebuild
> >
> > While working on my '70 2000 yesterday I found a pinhole in the longer of
> > the two hard lines on the driver side caliper so I'm going to have to fix
> > that. I've like to have a "Why the hell did you design it that way!"
> > discussion with the engineer who designed the front caliper setup, but
> > regardless I have to deal with it.
> >
> > I seem to remember a thread regarding the best way to bleed the front
> > calipers and I've dug around, but haven't been able to find it. Can
> someone
> > point me in the right direction? I also think the best thing to do is
> > replace all of the hard lines on both calipers so I'm going to be looking
> > for replacements. These things are pricy!!
> >
> > I did buy a Motive pressure bleeder, and although putting the cover plate
> > on the master cylinder is a bit fiddly the bleeder works pretty well.
> That
> > should help with bleeding the calipers.
> >
> > TIA,
> > Ron
> > ________________________________________
> >
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> >
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