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Brake line question
Posted: Thu Mar 17, 2022 6:38 pm
by TucsonJim
I'm working on a 1967 1/2 Datsun 1600 (dual master cylinder). On the passenger side of the firewall is a brake line brass "T" fitting. I see pictures of a much more complicated fixture on the passenger side with 6 hydraulic ports and an electrical post. Which is correct? Did someone do a mod on this car? I have no previous experience with Roadsters.
Also, can someone point me to a schematic diagram of the brake system plumbing? I need to know which line goes where. I have some notes that reference the connections to the front and rear master cylinders but I don't know if they mean the physical front of the car and rear of the car or if they reference the cylinder marked "F" and "R" since they are opposite.
As always, thanks in advance for any help you can provide.
Jim
Re: Brake line question
Posted: Thu Mar 17, 2022 7:17 pm
by DAC21
TucsonJim wrote: Thu Mar 17, 2022 6:38 pm
I'm working on a 1967 1/2 Datsun 1600 (dual master cylinder). On the passenger side of the firewall is a brake line brass "T" fitting. I see pictures of a much more complicated fixture on the passenger side with 6 hydraulic ports and an electrical post. Which is correct? Did someone do a mod on this car? I have no previous experience with Roadsters.
Also, can someone point me to a schematic diagram of the brake system plumbing? I need to know which line goes where. I have some notes that reference the connections to the front and rear master cylinders but I don't know if they mean the physical front of the car and rear of the car or if they reference the cylinder marked "F" and "R" since they are opposite.
As always, thanks in advance for any help you can provide.
Jim
This should help: it's for the 1967.5-1970. You can use the toggle arrows below the diagram to switch to the 1965-1967 piping which features the brake light switch on the manifold.
https://www.carpartsmanual.com/datsun/s ... e-piping#2
Re: Brake line question
Posted: Thu Mar 17, 2022 7:38 pm
by iloveredmeat
Hi Jim,
I don't know anything, but this is a photo of my 67.5 1600 when I first got it. I believe all lines were original.
There's also this image:
https://www.carpartsmanual.com/datsun/s ... e-piping#2
I hope this helps.
Good luck!
Peter
IMG_2898.jpeg
Re: Brake line question
Posted: Thu Mar 17, 2022 8:02 pm
by Solex68
DAC21 wrote: Thu Mar 17, 2022 7:17 pm
This should help: it's for the 1967.5-1970. You can use the toggle arrows below the diagram to switch to the 1965-1967 piping which features the brake light switch on the manifold.
I never knew about the arrows. Thanks DAC21
Re: Brake line question
Posted: Fri Mar 18, 2022 9:50 am
by spriso
67.5s use the brass block without the switch (the brake light switch is on the pedal).
Here are a few shots from the "project Unicorn" build:
Hope that helps,
Michael
Re: Brake line question
Posted: Sat Mar 19, 2022 10:45 am
by dynaguy
spriso wrote: Fri Mar 18, 2022 9:50 am
67.5s use the brass block without the switch (the brake light switch is on the pedal).
Here are a few shots from the "project Unicorn" build:
Hope that helps,
Michael
Gotta wear sunglasses when viewing those pics! Pat
Re: Brake line question
Posted: Sat Mar 19, 2022 10:53 am
by Solex68
Michael, curious why the clutch line runs over the top of the brake master?
Re: Brake line question
Posted: Sat Mar 19, 2022 12:40 pm
by iloveredmeat
Solex68 wrote: Sat Mar 19, 2022 10:53 am
Michael, curious why the clutch line runs over the top of the brake master?
Hey Greg,
Here is how my lines ran – with the clutch line over the brake master...
So, I'm guessing that's how they were routed originally? At least the 67.5s?
PM
IMG_9352.jpeg
Re: Brake line question
Posted: Sun Mar 20, 2022 12:38 pm
by Solex68
iloveredmeat wrote: Sat Mar 19, 2022 12:40 pm
Solex68 wrote: Sat Mar 19, 2022 10:53 am
Michael, curious why the clutch line runs over the top of the brake master?
Here is how my lines ran – with the clutch line over the brake master...
So, I'm guessing that's how they were routed originally? At least the 67.5s?
PM
Ahhh. I never noticed on my buddies early cars.
Re: Brake line question
Posted: Sun Mar 20, 2022 12:50 pm
by TucsonJim
Thanks for all the responses. Curious as to why the Project Unicorn photos show only 2 lines attached to brass “T†block.
Re: Brake line question
Posted: Sun Mar 20, 2022 1:54 pm
by bmccarthy67
It's a progression photo...there's plenty of his photos, use search function and search project unicorn) . Great reference for a half year. The T has 1 line in and 2 out (simple splitter...one.on your rear carrier as well.
V/r
Buddy
Re: Brake line question
Posted: Tue Mar 22, 2022 12:55 pm
by TucsonJim
I need to make sure I get this right. Would someone please look at the line that feeds the top of the "T" block and tell me if it goes to the master cylinder that is closest to the rear of the car (the port marked "F") or to the master cylinder that is closest to the front of the car (the port marked "R")?
Thank you
Re: Brake line question
Posted: Tue Mar 22, 2022 2:06 pm
by bmccarthy67
The line to that splitter is for the front brakes. The large (rear) reservoir on the MC marked as "F" . I did my lines a few months ago (on my Nov 2021 page) and it is a weird setup as you run a line over to the splitter only to bring one back to the front drivers side (Spriso) has some great examples of lines that don't need to cross, but those are on his custom builds. Your splitter is the factory setup. Are you bending new lines? If you are making your own you can place them as you like. I used one old line to create the bends for the pocket in the middle of the firewall.
v/r
Buddy
Re: Brake line question
Posted: Tue Mar 22, 2022 7:15 pm
by TucsonJim
Thanks everyone, I feel confident I got it now.
Re: Brake line question
Posted: Tue Mar 22, 2022 8:30 pm
by iloveredmeat
TucsonJim wrote: Tue Mar 22, 2022 7:15 pm
Thanks everyone, I feel confident I got it now.
That's the beauty of this forum... awesome, smart people.
Good luck, keep all posted,
Peter