FAQ - Replacing mastercylinder Lj80II with Sj413

Links to articles to repair/upgrade your L series Suzuki

Moderator: Smuz

Post Reply
User avatar
vidar
LJ Enthusiast
LJ Enthusiast
Posts: 757
Joined: Thu Jun 03, 2004 1:25 pm
Location: Norway
Contact:

FAQ - Replacing mastercylinder Lj80II with Sj413

Post by vidar » Fri Jul 11, 2008 10:24 pm

I decided i needed some more braking power with the disk brakes up front on my lj80 1983, i used SMUZ´s very nice write up, but i had to make some adjustments for my lj80II. PS: im not trying to copy Smuz´s :)

Take care when doing this, this is not done by proffesional mechanics and should be done at yor own risk :suz:

Bought the front end of a sj413 brakeassy from a local scrappy. Remove the old one:

Image

Remove the cotter pin on the brakepedal assy:

Image

Removed, use care not to spill any brake fluid, it will make your lj rust..... :) yeah you know all about that

Image

Sj413 and lj80, the holes from the lj80 cylinder will be measured and drilled with the same width on the 413 cylinder.

Image

I removed the pin connecting the lj80 cylinder to the brakepedal, it was fastened with a retainer which i easyli pried out with a small screwdriver.

Image
Image

Then i drilled the 413 cylinder so it would fit the same holes as the lj80 cylinder. Take care doing this so you dont make one large hole.

Image

Then i made the firewall hole bigger so it would accomodate the 413 cylinder, remember to put the two screws holding the pedal assy in its place when drilling out the hole.

Image

Removed a lot of old deposits from the 413 cylinder

Image

Test fitting, both "ears" on the 413 cylinder was hitting some of the body, i just bent it back a bit.

Image

The pin for the brake assy was made ismaller, so it would fit inside the 413 cylinder.

Image

Final assembly, i made some shims covering the original holes for the 413 cylinder, the top of the fluid holder is a tight squeeze into the firewall, but its not a big issue.

Image
Vidar
Founder Suzuki 4x4 Norway
http://suzuki4x4.no/" onclick="window.open(this.href);return false;
http://vidar-foto.blogspot.com/" onclick="window.open(this.href);return false;
User avatar
Frankenstein
Spammer Hammer
Spammer Hammer
Posts: 3115
Joined: Wed Mar 08, 2006 12:23 pm
Location: Schipluiden, Netherlands
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by Frankenstein » Sat Jul 12, 2008 3:14 am

That's looking good! I think you can also grind down the ears to make it fit instead of bending the body.

So how is the breakingpower?
I hate rust...

The older I get the better I was...

http://www.suzukilj80.nl" onclick="window.open(this.href);return false;
User avatar
Jimny
It's an LJ thing!
It's an LJ thing!
Posts: 4738
Joined: Wed May 28, 2003 7:02 am
Location: KANSAS
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by Jimny » Sat Jul 12, 2008 3:50 am

Very nice write-up!! :cool: Good job!









BTW: I like your vice! I need one like that, I keep saying I'm going to get one but haven't yet.
I'd rather be driving my LJ!
User avatar
ResidentPsycho
LJ Enthusiast
LJ Enthusiast
Posts: 274
Joined: Sun Jun 24, 2007 4:11 am
Location: Queensland, Australia

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by ResidentPsycho » Sat Jul 12, 2008 6:53 am

:cool: nice write up vidar.

hope it is as easy as it looks when i get around to it :))):
If you can't fix it with a hammer. You got an electrical problem!
Image
User avatar
vidar
LJ Enthusiast
LJ Enthusiast
Posts: 757
Joined: Thu Jun 03, 2004 1:25 pm
Location: Norway
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by vidar » Sat Jul 12, 2008 7:35 am

Thanks :)
Vidar
Founder Suzuki 4x4 Norway
http://suzuki4x4.no/" onclick="window.open(this.href);return false;
http://vidar-foto.blogspot.com/" onclick="window.open(this.href);return false;
User avatar
Smuz
Resident Curmudgeon
Resident Curmudgeon
Posts: 3425
Joined: Thu Jun 05, 2003 6:53 pm
Location: Kansas City (Lenexa)

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by Smuz » Sat Jul 12, 2008 12:55 pm

Nice write-up.

Don't worry about copying me, this is all about info sharing. The more info the better.
The above is my opinion. It is subject (like all my opinions) to debate, disagreement, rude gestures, and loud raspberries.
User avatar
vidar
LJ Enthusiast
LJ Enthusiast
Posts: 757
Joined: Thu Jun 03, 2004 1:25 pm
Location: Norway
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by vidar » Sun Jul 13, 2008 9:46 am

can we put it on the frontpage in the how to section? i´ve had some requests about the conversion?
Vidar
Founder Suzuki 4x4 Norway
http://suzuki4x4.no/" onclick="window.open(this.href);return false;
http://vidar-foto.blogspot.com/" onclick="window.open(this.href);return false;
User avatar
vidar
LJ Enthusiast
LJ Enthusiast
Posts: 757
Joined: Thu Jun 03, 2004 1:25 pm
Location: Norway
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by vidar » Mon Jul 14, 2008 2:03 pm

Tried the brakes today......... :ohno:

Stopping power :cool: :suz:
Vidar
Founder Suzuki 4x4 Norway
http://suzuki4x4.no/" onclick="window.open(this.href);return false;
http://vidar-foto.blogspot.com/" onclick="window.open(this.href);return false;
User avatar
Frankenstein
Spammer Hammer
Spammer Hammer
Posts: 3115
Joined: Wed Mar 08, 2006 12:23 pm
Location: Schipluiden, Netherlands
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by Frankenstein » Mon Jul 14, 2008 2:50 pm

Awesome :D
I hate rust...

The older I get the better I was...

http://www.suzukilj80.nl" onclick="window.open(this.href);return false;
User avatar
vidar
LJ Enthusiast
LJ Enthusiast
Posts: 757
Joined: Thu Jun 03, 2004 1:25 pm
Location: Norway
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by vidar » Tue Jul 15, 2008 8:55 am

And then i tried them in the wet.... ooops, had to brake while turning, nearly spun around:)

So now i need a brake bias valve :) anyone?
Vidar
Founder Suzuki 4x4 Norway
http://suzuki4x4.no/" onclick="window.open(this.href);return false;
http://vidar-foto.blogspot.com/" onclick="window.open(this.href);return false;
User avatar
Frankenstein
Spammer Hammer
Spammer Hammer
Posts: 3115
Joined: Wed Mar 08, 2006 12:23 pm
Location: Schipluiden, Netherlands
Contact:

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by Frankenstein » Tue Jul 15, 2008 1:11 pm

Spidertrax has proportioningvalves. They use them a lot on samurai's when they put on rear diskbrakes.
I hate rust...

The older I get the better I was...

http://www.suzukilj80.nl" onclick="window.open(this.href);return false;
mrrocky
LJ Enthusiast
LJ Enthusiast
Posts: 74
Joined: Tue Sep 27, 2011 2:56 am

Re: FAQ - Replacing mastercylinder Lj80II with Sj413

Post by mrrocky » Sun May 21, 2017 2:12 pm

Just did this swap but used a master cyl from a 2001 suzuki baleno sedan, same as a sj50/70 just newer and has a smaller cap making filling easier given firewall proximity
Post Reply