1964 master up grade

[My wife said no FJ!]

Hi Guys, did another search, but still did not quite find the answer I was looking for...

What year did dual master brake cylinders start on the FJ40’s?

I’d like to up-grade my single line on the ’64 to a dual, with out having to go to a booster. I want to keep this simple, and stock “looking”, but still make it safer.

Can a newer dual master just bolt into my ’64…and would I have to change the wheel cylinders as well to match? What year model should I look for?

Besides a roll cage and shoulder seatbelts, this would probably be to only changes I would make to the 25 as well...all in the name of safety.

Thanks

 

[JohnnyC]

dont quote me ...67-68?

the singke line is dangerous...a friend was going up hill wheeling and lost his brakes...rolling backwards at about 30 mph till it hit a tree...not a pretty rig after that

 

[JohnnyC]

sor has the change at 1970...i think Rabid here on mud made this mod on his?

and looks like the mounting bolt holes are different...was there a duel can for the larger brake lines?

there was a brake line issue also?

somebody here in the 25 section should know definatively

 

[My wife said no FJ!]

I am not 100% sure on this, but I think they went to 10mm in '70 or '71?!? Before that it was 9mm, so my guess is to do this right, I will have to change all the lines, and the wheel cylinders to match...truth be told, I was going to change the rest anyways, just trying to figure out the master.

I think Tyke told me that he did this with a newer master on a '64, and that it might have just bolted in...but I don't remember which year he used

I am hoping someone here did something similar at one point

 

[IDave]

My 9/70 truck was the first month built that way. OR maybe it was 7/70. One, they added the duelies, the other month they added the booster. Conversion has been done quite a bit, you need a spacer to account for the firewall rail.

 

[My wife said no FJ!]

I read about the spacers (not that I know where to get one) but I thought they were strickly useful if you intend to add a booster. Since I am not looking to install a booster, I figured I wouldn't need the spacer...or am I mistaken?

So...your '70 has duelies, and no booster...can I trouble you for a couple pictures? You happen to have a P/N on hand for your dual master ?

 

[65swb45]

I made the conversion you are speaking of on my 65swb. There should be a pic in the service link on my website.

I had a small batch of adapter plates machined at that time with 8 holes, just using the two master cylinders involved for a template. One large hole to cover the bore, 3 tapered holes to match the original bolt pattern and 4 for the new one. 7 flat head machine screws and voila, a dual master bolted to the firewall!

If you call me at the shop, I'll have a look-see if I have one of those adapters left.

Mark A.

 

[My wife said no FJ!]

Cool Mark...I try and drop you a line this afternoon your time!

 

[My wife said no FJ!]

Hi Mark,

Just called, and left you a voice mail.

Took a look at your service section, and I could just make out your adapter plate. If you have better pictures, please e-mail them over.

Which dual master did you use? Besides the adapter plate, what else did you do to the new dual master...did you fab a new brake rod?

Thanks,
Dean

 

[My wife said no FJ!]

Mark...anyway you can get better picks over to me?

What did you do for the brake rod?

 

[My wife said no FJ!]

dont quote me ...67-68?

the singke line is dangerous...a friend was going up hill wheeling and lost his brakes...rolling backwards at about 30 mph till it hit a tree...not a pretty rig after that

Why didn't he pull the parking brake? ...or shut the engine off?

 

[JohnnyC]

Why didn't he pull the parking brake? ...or shut the engine off?

PB didnt stop it...i guess it needed adjustment

i dont think he had the time to try that also...he was too busy dodging trees and hearing his kid laughing...he was only 4 at the time i think...it was a matter of seconds...its amazing how fast they get up to speed rolling down hill...he must have had a backwind also

 

[My wife said no FJ!]

PB didnt stop it...i guess it needed adjustment

i dont think he had the time to try that also...he was too busy dodging trees and hearing his kid laughing...he was only 4 at the time i think...it was a matter of seconds...its amazing how fast they get up to speed rolling down hill...he must have had a backwind also

I don't know about the back wind...but things can really get out of control fast ...glad no one was hurt.