Leaking brake line

1989 Toyota Pickup Truck, rear-wheel drive.



Front disc brakes, rear drum brakes.

I use this vehicle on my property for hauling tools and dirt etc.

Last week, one of the brake lines sprung a leak, and I lost most of the fluid in the master cylinder. I still have some braking, but the pedal goes most of the way to the floor and is spongy.

There seem to be TWO brake lines, running side-by-side going to the rear of the vehicle. It is one of these lines that sprung the leak.
Both of these lines go into some sort of small device at the rear of the vehicle. One line comes out of this device and goes to a second device. There are two lines coming out of the second device; one goes to each rear wheel. What is the purpose of this arrangement?

Can I simply crimp the bad line upstream of the leak, to prevent loss of fluid and retain full function of the front disc brakes?



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Knifeblade_03
1 answer
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I believe you are describing proportional check-valves for the braking
system, not good to bypass them. Just get replace metal tubes, a cheap
tube-bender, drop the original lines, bend the new to shape, compression
fitting and nut, good to go.


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I have heard of others crimpint radiator tubes and brake lines, but my experience has never been successful at it. Brake fluid is very thin and slippery. I suppose a guy could try to solder it closes at the crimp, but why. Fixing it is quicker.
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that is a valve used to very the braking force in proportion to the


weight in the bed of the truck. dont bypass anything just replace the
lines autozone and checkers sell brake line with fittings in various
lengths and sizes just take the leaker off buy one thats close bend
install and go..
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Why are there 2 brake lines going to the rear of the vehicle? Is this
for redundancy, or do they serve different purposes?
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Why not trace them back and see if each goes to a separate reservoir on the master?
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>

I tried, but I don't have a visual the whole way. I'd have to take a
bunch of rusted-on stuff off to see where they go.

What I need is a hydraulic schematic of this vehicle's brake system.

I had an old Haynes manual laying around and looked in that, but all it
says is that the front and rear brakes are serviced by separate
hydraulic circuits.

I googled around quite a bit looking for a website with a hydraulic
schematic but couldn't find a thing.

If anyone out there has a manual for this model and year truck and
would be willing to answer a few questions about the brake hydraulics
it would be much appreciated.
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