I have an 87 4runner mostly stock..since purchasing 4 years ago I have used as a daily driver and extreme off road machine. Throught the years I have had countless brake issues, so today I rebuild the entire brake system removing lspv putting on an aftermarket prop valve from Jegs with one inlet and one outlet. I have removed the brake line going from front to lspv, and blocked appropriately. however the aftermarket LSPV from Jegs has different fittings and I am unable to screw the current brake line into it (which i believe is M10x.1?) It seems the fittings on the prop valve are female Npt? Not exactly sure with all this fancy brake line adapter lingo, basically what I'm looking for is what adapters do I need to purchase to attach my current brake lines to these after market fittings.

I will be attempting to add photos momentarily.

 

I will also be adding a used booster and master cyl because I believe they may be contributing to the over all problem of fluctuations in the rpm when brake is applied

 

Your MPV probably has standard fittings, your Toyota metric. You can get adapters at Summit or JEGS.

:wabbit2:

 

I am trying to connect the "brake line" on the bottom left to the "inlet" on the bottom right. Above the two I included a view inside the "inlet" I am trying to connect to. Not sure what adapter I am suppose to use any help provided would be greatly appreciated.

 

Perhaps this is the adapter i am looking for?

Adapter, Master Cylinder to Brake Line, 3/16 Tube to 3/8 in.- 24 Flare Female, -3 AN Male, Each


http://www.summitracing.com/parts/WI...n/?prefilter=1

 

Your Toyota fittings are metric. You need standard to metric brake line fitting adapters.

:wabbit2:

 

thanks wabbit for the quick response as always. i understand i need standard to metric brake line fitting adapters, im just not sure how or where to find them with the -3an, -4an, 10mm x 1.25mm, NPT none of that makes sense to me. is the -3an standard?

 

Everything you want to know about brakes and more is here:
http://www.pirate4x4.com/forum/showthread.php?t=775780

:wabbit2:

 

Some place on your new valve it should tell you what size the female connections are . Maybe on the package ?? maybe the website you ordered it from.

you just need a adapter with a male thread that size and a Toyota M10x1 female thread .

 

after further research I discovered a prop valve is not exactly required... I removed the valve all together plugged the front to back line and connected the back line directly to the flexible line that goes to the axle, after some bleeding TLC I have a hard brake pedal that stops my vehicle in an orderly fashion.

 

That would work on a trail rig but could be deadly on a DD. Without a proportioning valve in the rain or ice, your back brakes will lock up before your front brakes.

 

One just needs to learn how to brake these valves were never on the early pick ups when I learned to drive.

Just engage Common sense before the transmission.

 

The fittings to adapt the wilwood brake valve (which has 1/8 NPT ports) to the 10mm x 1.0 brake line fitting are

361-916103 ST-3 female to 1/8 NPT
361-989538 -03 AN to 10mm x 1.0

you will need two of each

these part numbers are from jegs but if you leave off the "316" you should be able to do a search on just "Earls" part number.

I was going to use these to add rear disks and bigger front brakes to my 87 4runner, but i found it easier to cut and reflare the brake tube with standard brake fittings..