brake issue

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brake issue

Post by zabo on Tue Jun 19, 2012 1:43 pm

So ive been driving the 60 daily the past few weeks- the other day I was on a crazy steep hill near my job and was really jamming on the brakes-
all of a sudden the pedal went to the floor. Luckily my ebrakes working good Shocked

anyway all the lines are good/fairly new- didnt see any fluid coming from the wheel cylinders.
The only place i noticed some fluid was around the brake fluid reservoir cap.

Any idea why this would happen? A few pumps and I had good pedal again.


sound like just bad MC?
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Re: brake issue

Post by laith on Tue Jun 19, 2012 2:11 pm

zabo wrote:So ive been driving the 60 daily the past few weeks- the other day I was on a crazy steep hill near my job and was really jamming on the brakes-
all of a sudden the pedal went to the floor. Luckily my ebrakes working good Shocked

anyway all the lines are good/fairly new- didnt see any fluid coming from the wheel cylinders.
The only place i noticed some fluid was around the brake fluid reservoir cap.

Any idea why this would happen? A few pumps and I had good pedal again.


sound like just bad MC?

Possibility that you boiled the fluid at the wheel cylinders. Crazy steep hill + drum brakes = lots of heat. I would recommend a complete fluid flush and re-bleed.

Out of curiosity, do you have a single or dual circuit m/c?
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Re: brake issue

Post by peregrine67 on Tue Jun 19, 2012 2:13 pm

zabo wrote:sound like just bad MC?

That would be my first guess. If you end up replacing it I'd consider upgrading to a dual circuit MC too. Not sure how much trouble that would be for a '60 but it might be worth it.
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Re: brake issue

Post by zabo on Tue Jun 19, 2012 2:19 pm

i dont think i boiled the brakes- I had just started the car- pulling out of the parking lot at work.

its a single master cylinder
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Re: brake issue

Post by Clyde on Fri Jun 29, 2012 11:49 am

You probably have a oring with a flat spot on it in the mc. Works most of the time, and suprises you when it feels like it.
If you had a dual circuit setup you would have only lost half of your brakes. It's more expensive, but who cares if it saves your life, or an expensive body shop bill.
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Re: brake issue

Post by zabo on Fri Jun 29, 2012 2:17 pm

i think i figured it out- bad grommet where reservoir hose goes in- under a lot of pressure fluids coming out there
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Re: brake issue

Post by zabo on Thu Jul 05, 2012 8:06 am

so i guess I was wrong- got a nice new german grommet - no leaks there now.
Replaced the Master Cylinder as well. Seems to have good pedal, only when im on a hill or just apply constant even pressure to it will it go to the floor


driving me crazy- i havent pulled the back wheels off yet- but im not seeing any fluid dripping around the wheel cylinders
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Re: brake issue

Post by Clyde on Thu Jul 05, 2012 9:14 am

How's the main steel line under the pedal cluster? Rust attacks there unnoticed...
Might be a hole small enough to hold pressure most of the time.
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Re: brake issue

Post by vw57drvr on Thu Jul 05, 2012 10:13 am

Randomly going to the floor almost has to be the master cylinder "bypassing". What kind of cylinders are you using?
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Re: brake issue

Post by zabo on Thu Jul 05, 2012 11:04 am

ill check out the lines again

using Vargas
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Re: brake issue

Post by vw57drvr on Fri Jul 06, 2012 6:56 pm

Those are pretty good. Is that the brand of master cylinder too?
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Re: brake issue

Post by zabo on Fri Jul 06, 2012 7:45 pm

yep - my sons taking the wheels off now as i relax in the ac- going to double check all the wheel cylinders- then prob try replacing the soft lines in case they may have collapsed inside or something.

all the hardlines look good.
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Re: brake issue

Post by vw57drvr on Fri Jul 06, 2012 10:57 pm

Collapsed lines wont normally do that but good idea to check anyway. What kind of reservoir?
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Re: brake issue

Post by zabo on Sat Jul 07, 2012 8:01 am

stock 60 metal reservoir
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