: where's the redundancy to keep from losing brakes completely?


booboo
03-24-2004, 04:24 PM
gotta luv that rear brake line along the axle
but it would seem to just be a big target with sharp rock written all over it...
and i no find no redundant feature to keep me from biting it if i go down a hill after my rear line is leaking and i dunno that yet
there is sposed to be one tho...
tracing the lines sure didn't help me find it
my fiats had a little flapper valve gizmo right past the m/c so one side would force the other side shut if it lost pressure
so you'd at least hav half the brakes

Pazuzu
03-24-2004, 04:48 PM
The redundancy is that the rear brakes are useless anyways, and the fronts are on a different circuit, so if you break that rear line, you're still OK.

Pook
03-24-2004, 04:49 PM
aren't toy masters a dual setup....but only one resiover. I'm guessing you'd feel it but give it a second pump and should have enough to stop.

Alabamatoy
03-24-2004, 06:01 PM
I have always wondered about this - the Load Sensing Prop Valve redirects pressure from rear system to front, so in fact he's kinda right - only one system. I ditched the LSPV so I have two separate systems now.....

Colorunner
03-24-2004, 06:09 PM
factory mechanical e-brake...

ErikB
03-24-2004, 06:09 PM
1- dual chambers in the master. And if you look inside the reservoir, you'll see that there is a baffle inside there to separate a small amount of fluid for front or rear if one or the other goes dry.

2- e-brake.


And the port from the front to the LSPBV is only supposed to be a pressure sensing port. Nothing should actualy be flowing through it and to the rear brakes.

Wazzobie
03-24-2004, 06:11 PM
so if you break that rear line, you're still OK.

After breaking a rear line, a few 5-10 pumps later you will not stop any more.
Thats why they make e-brakes:D

read:
http://www.off-road.com/toyota/projects/tacoma/rear_brakes/

TNToy
03-24-2004, 07:20 PM
I've had two lines severed on the trail. Since it appears that I'm the only one here that's done that, it explains why I'm also the only one that hates braided steel lines.

When you tear a line in a Toy, whatever they say has been designed in... it has what I call a "dual stopping" system: The brake pedal stops when it hits the floor. The truck stops when it hits a tree.

myeyesore
03-24-2004, 08:46 PM
uh not a toybut your not the only one to break a line. Rip a front, dont notice then try a hill climb nothing but fun fun fun. oh and build a cage.

VT_Toy
03-24-2004, 10:09 PM
If your brake light comes on - STOP WHILE YOU STILL CAN, then find the problem.

I broke a line and pinched it with vice grips to get home once. I forget if it was front or rear.

Wazzobie
03-24-2004, 10:15 PM
.http://www.pirate4x4.com/forum/attachment.php?s=&postid=2617846

:eek: :eek: :eek: :eek: thats just wrong... get that on tape?:confused:


edit
I pinched a leaking steel brake line off to make it home once it was a good thing I carried brake fluid with me



When you tear a line in a Toy, whatever they say has been designed in... it has what I call a "dual stopping" system: The brake pedal stops when it hits the floor. The truck stops when it hits a tree.:grinpimp: :nuke: :bounce: :bounce2:

missouriman
03-24-2004, 11:03 PM
I think that I have just blown half of my mc. not sure what is going on with it

myeyesore
03-24-2004, 11:06 PM
Nope no tape, we didnt even get pics till we got it home. Near as we can figure it, we must have broken a front line screwing around on the way to the hill, didnt use much brakes for a while headed up the hill, got stuck, put it in reverse and, suprise, no brakes, rolled four or so time, (what we were told) and hobbled out. I was the passanger in that one.

Never fails though, some landrover guy came by and said, wow, maybe you guys shouldn't have driven so fast... :rolleyes:

Wazzobie
03-24-2004, 11:08 PM
I think that I have just blown half of my mc. not sure what is going on with it

1/2 or whole thing same part:flipoff2:

Wazzobie
03-24-2004, 11:15 PM
I was the passanger in that one.



that roof looks pretty bad did you guys ad some to it after the roll?

landrover guy ya might as well group um:D :rolleyes: :D

Pazuzu
03-25-2004, 12:48 AM
Originally posted by Wazzobie


After breaking a rear line, a few 5-10 pumps later you will not stop any more.
Thats why they make e-brakes:D


Ah, but you HAVE those 5-10 pumps to stop. Therefore, redundancy. I know it's semantics :D but the fact is, if you blow your rear line, you can still stop the truck. Once. But it will stop.

booboo
03-25-2004, 01:09 AM
well
thanx all for clearing that one up...
i'm now plenny paranoid

iz the lamp staring at me AGAIN ???
SHUT UP DAMMIT
i dun care how many eunuchs it took to screw in yor bulb

TNToy
03-25-2004, 06:26 AM
Originally posted by Pazuzu
Ah, but you HAVE those 5-10 pumps to stop. Therefore, redundancy. I know it's semantics :D but the fact is, if you blow your rear line, you can still stop the truck. Once. But it will stop.
Dude, when I broke a line, there were no brakes. Gone. End. Period.

Wazzobie
03-25-2004, 09:25 AM
Dude, when I broke a line, there were no brakes. Gone. End. Period.

Yep, I think the only reason I had at least some brakes left is when my rear line broke it got pinched part way off at the same time so it was a slower leak.
Dan

Pazuzu
03-25-2004, 01:05 PM
Originally posted by TNToy

Dude, when I broke a line, there were no brakes. Gone. End. Period.
You didn't break a line. You had some Alien Tree Monster reach up and chop away at it, and drink all of the brake fluid out like a straw. Normal people don't have that happen to them :p

KLF
03-25-2004, 02:29 PM
Originally posted by Pazuzu
The redundancy is that the rear brakes are useless anyways, and the fronts are on a different circuit, so if you break that rear line, you're still OK.

Uhhhh.... I don't think so. Go out and open a rear bleeder then stomp on the pedal. My bet is that it goes right to the floor. Keep pumping the pedal, you'll bleed out all the fluid in the reservoir, then you're really screwed.

The redundancy is the mechanical e-brake. This is why line locks are NOT considered e-brakes.

Alabamatoy
03-26-2004, 05:49 AM
Originally posted by KLF
Uhhhh.... I don't think so. Go out and open a rear bleeder then stomp on the pedal. My bet is that it goes right to the floor. Keep pumping the pedal, you'll bleed out all the fluid in the reservoir, then you're really screwed.I think this is true with the LSPV in place, but when I bleed mine (no LSPV, 93 FJ80 MC, Lowcar Monte rear calipers) it will not go to floor. Course when I'm bleeding them I dont keep using the brakes, and with a leaker its going to drain the reservoir quickly like you said. But the fronts are going to work for a few pumps. I think.....

Yall got me worrying this now - I think I am gonna get a can of brake fluid and loosen a rear bleeder and prove it one way or the other.

mypayperview
03-26-2004, 06:23 AM
Man i have ripped off the brake lines on my bros 83 toyota and the dang thing never even slowed down i pumped the heck out of the brake just hopping for a little stopping power, Nope there wasnt none. Well he didnt have his ebrake hooked up, so my friend that we were with has a nice pushed tailgate on his samurai. He stopped the rig but wasnt overly happy about it.

booboo
03-26-2004, 06:15 PM
i hav comforting nooz...
i just saved a bundle on my oTTo insurance
i wish
but here's wut'll actually happen:
you know how the rear shoes haf to be adjusted with little clearance or the pedal will hav looong travel with no effect till the shoes start rubbing?
well, cut brake line's gonna do the same thing
no front brakes ...
besides,
is there even gonna be time to pump em or panic or anything?

it's about as cool as saying i get a free o2 sensor at 80K miles
like it duz in the manual

regional toyota...
try regional farkus, sid