[Roadsters] braking

[Jerry Krakauer]

Just a thought... You mentioned using DOT 5, DOT 3, 4 and 5.1 are all
compatible, but DOT 5 is silicone and not compatible with the others. If in
fact you used 5 without a real thorough flush it can cause major problems.
Of course you said the fluid was changed a while ago, if it was driven and
worked since then, then that's probably not the issue.

Jerry Krakauer
SRL311 00099

-----Original Message-----
From: datsun-roadsters-bounces at autox.team.net
[mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of
ppeters914 at comcast.net
Sent: Monday, October 07, 2013 4:59 PM
To: Datsun Roadster List
Subject: Re: [Roadsters] braking

x2 on what Gary said. Some additional thoughts.....

Being an early '67, it's probably the single reservoir m/c. 

Any leakage on the m/c? Check both sides of the firewall. 

Does the m/c flex at the firewall when the brake pedal is pressed? You'll
need a second person to check that. 

Thickness of the front rotors & pads? If they're near the minimums, your
braking effort will be higher & the effect less. At least it was on mine. 

Regards. 

Pete   
Sent via BlackBerry by AT&T

-----Original Message-----
From: Gary and Cindy Ault <aultgc at att.net>
Sender: datsun-roadsters-bounces at autox.team.netDate: Mon, 7 Oct 2013
10:13:11
To: Dave<dave at ranteer.com>; Datsun<datsun-roadsters at autox.team.net>
Reply-To: Gary and Cindy Ault <aultgc at att.net>
Subject: Re: [Roadsters] braking

Dave,
 
No surprise that you couldn't turn the wheels with pedal applied.  It
doesn't take much braking force to exceed the capability of a human being.
 
What's your concept of "braking as it should"?  Have you ever driven a
roadster with brakes in good working order?  Pedal effort required is very
high compared to modern cars with front disc brakes, owing to the absence of
a vacuum booster.  Can you lock the brakes when driving?  Is the pedal
spongy or firm?  If spongy, you haven't gotten all the air out.  Did you
first bleed the M/C, then start with the RR wheel cylinder, LR wheel
cylinder, RF wheel cylinder and finally LF wheel cylinder?
 
If you cannot lock the brakes, first
check to make sure the rear drums are properly adjusted.  If that doesn't
help, about the best I can suggest is to make sure the disc pads are not
contaminated, and, if not, I think it's time to take the calipers apart and
make sure there isn't any cr___ preventing proper movement of the pistons in
the cylinders.  Come to think of it, wouldn't hurt to dismantle the rear
cylinders, either.  You probably don't know the condition of things before
you bought the car.  Kits are inexpensive, and having fresh rubber in the
cylinders should be a comfort.
 
Gary

________________________________
From:
Dave <dave at ranteer.com>
To: Datsun <datsun-roadsters at autox.team.net>
Sent:
Monday, October 7, 2013 8:14 AM
Subject: [Roadsters] braking


early 67
roadster

bought this car in 05.  been working on it off and on since.  never
really had
it on the road until now.  bled through with dot 5 a number of 
years ago.

I think Ibve replaced the brake hoses, and recently bled the
brakes
profusely.  still not braking like it should.

jacked the front up and
had the wife hold down the brakes; I canbt turn the
wheels.

any thoughts as
to where I should look?