hydraulic handbrake install

[disturbed1]

has any1 here installed a hydraulic handbrake in their mk3?

after installing mine, i find that the foot brake pressurises the handbrake master so that it looks up the rear brakes.

im not sure if thats due to the adjustment on the HB piston/master or if supras have some fancy brake master setup whereby installing a hydraulic handbrake isnt as simple as just plumbing it in series between the line running to the rear brake calipers

 

[easternguy2005]

fancy ? the rear brake pistons on the Master Cylinder is the first to engage and only as far as the spring inside the M.C.allows it to - so it never really locks hard on the back.

Jeesh man hydraulic handbrakes....thats NOT on MY to do list.

 

[HommerSimpson]

has any1 here installed a hydraulic handbrake in their mk3?

after installing mine, i find that the foot brake pressurises the handbrake master so that it looks up the rear brakes.

im not sure if thats due to the adjustment on the HB piston/master or if supras have some fancy brake master setup whereby installing a hydraulic handbrake isnt as simple as just plumbing it in series between the line running to the rear brake calipers

I would like to see pictures please...

and is there a check valve ? or something thats not allowing the pressure to release ?

 

[mk3ukr]

im not sure if thats due to the adjustment on the HB piston/master or if supras have some fancy brake master setup whereby installing a hydraulic handbrake isnt as simple as just plumbing it in series between the line running to the rear brake calipers

I did it 3 years ago exactly like you are describing "just plumbing it in series between the line running to the rear brake calipers"
Here is old picture
http://www.mk3ukr-supra.com/Hydro parking brake 01a.jpg

It worked well for me, though 1 month ago I replaced piston and seals using repair kit and relocated lever and cylinder on top of shaft tunnel

 

[disturbed1]

I would like to see pictures please...

and is there a check valve ? or something thats not allowing the pressure to release ?

im not sure if theres a check valve or such.


sorry the pics so big - was wondering why it was taking so long to upload

 

[GrimJack]

So does this switch you from using the drum based ebrake to activating the rear discs instead?

That's more than a little bit silly, IMO. The whole idea behind the ebrake is that it will still function well enough to stop the car after some piece of debris tears a hole in your hydraulics, causing the hydraulic system to fail.

 

[jmanbball]

So does this switch you from using the drum based ebrake to activating the rear discs instead?

That's more than a little bit silly, IMO. The whole idea behind the ebrake is that it will still function well enough to stop the car after some piece of debris tears a hole in your hydraulics, causing the hydraulic system to fail.

It's no longer a parking or emergency brake; its a handbrake for drifting.

 

[mk3ukr]

So does this switch you from using the drum based ebrake to activating the rear discs instead?

That's more than a little bit silly, IMO. The whole idea behind the ebrake is that it will still function well enough to stop the car after some piece of debris tears a hole in your hydraulics, causing the hydraulic system to fail.

I agree, but what is the chance of both front and rear hydraulic circuits being damaged at the same time? If one gets damaged another will still work.

 

[cruisnhard]

Then wouldnt the pressure push the fluid through the front damaged lines and render the rear useless. I am with Grimjack.

If it is for drifting them cool.

 

[IJ.]

That's what the divider in the master cylinder is for

 

[disturbed1]

So does this switch you from using the drum based ebrake to activating the rear discs instead?

That's more than a little bit silly, IMO. The whole idea behind the ebrake is that it will still function well enough to stop the car after some piece of debris tears a hole in your hydraulics, causing the hydraulic system to fail.

Correct, the supra no longer has anything associated with the cable drum brakes. Im running 324mm all round with nissan calipers and also saved 15 kg in the process. As u can see this isnt a street car.

is anyone able to help with the original problem??

 

[GrimJack]

So just to clarify, the problem is that when you step on the brakes, the rear wheels lock? They still release fine when you let off the pedal, right?

Are you running the ABS or non-ABS?

 

[Poodles]

You've increased the size of the back calipers more than the front (at least that's what it sounds like).

If they are all the same brake setup, the back WILL lock first as the weight is unloaded on the rear tires when you brake.

Nothing to do with the handbrake...

 

[disturbed1]

So just to clarify, the problem is that when you step on the brakes, the rear wheels lock? They still release fine when you let off the pedal, right?

Are you running the ABS or non-ABS?

nah, when u pump the foot brake, its applys all four calipers as normal, yet when u back off and try to use the handbrake, the handbrake master is already pressurised, therfore the rear wheels are already locked and u cant lift the handbrake up at all.

so when i release the foot brake - it appears its not releasing the pressure in the rear half of the system

no im not running abs.

poodles: nissan 4 pot fronts, nissan 2 pot rears

 

[Poodles]

sounds like if there is a check valve, it's in backwards...

 

[GrimJack]

Or the ebrake isn't releasing all the way. If it's the same as a master cylinder, it has to go all the way back to it's rest position before pressure can bleed off.

 

[omfgitsdonovan]

wow i have never seen such a thing like that until now very cool.