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nattybumppo
09-16-2010, 08:27 PM
I was driving around the neighborhood today just minding my own business when the brakes on my 60 started to do some weird stuff. They still worked when I at first pressed on them, and when I pumped tem, but if I held them down for a while the peddle would slowly slowly sink to the floor. I'm thinking I have a seal failing in my master cylinder and it is gonna get worse fast. Any Ideas?

nuclearlemon
09-16-2010, 08:58 PM
pardon me, but i've been drinking, but as you hold the peddle, it slowly sinks? if so, yes, most likely your master. get a rebuilt unit, or rebuild your's (easy to do...just a quick hone and some new seals)

MDH33
09-16-2010, 09:01 PM
pardon me, but i've been drinking...

:shots::beer2::boozer::drink::cheers:

PabloCruise
09-17-2010, 01:38 PM
Even when Ige is drinking, she is good!

Sinking pedal would point me to master cylinder.

Have you checked fluid level in your master?

Dr. Schlegs
09-17-2010, 01:58 PM
Have you checked fluid level in your master?

Would fluid necessarily leak out, being a closed system? Could a seal be torn that would cause there to be less pressure/resistance build up? Again this would beg the question of what caused the seal to fail?

Ige is sharp as a tack when it comes to all things Cruiser. Beer just helps her open up and be less shy. :lmao: Thanks for all your help with my projects Ige, it is always great to hang with you.

PabloCruise
09-17-2010, 04:02 PM
Would fluid necessarily leak out, being a closed system? Could a seal be torn that would cause there to be less pressure/resistance build up? Again this would beg the question of what caused the seal to fail?

Ige is sharp as a tack when it comes to all things Cruiser. Beer just helps her open up and be less shy. :lmao: Thanks for all your help with my projects Ige, it is always great to hang with you.

No, fluid would not necessarily leak out, but seems like a good first diagnostic as it would be very simple to confimr.

When I rebuilt my 40 MC, I had pitting in the bottom of my bore which I am guessing was caused by old brake fluid absorbing water. That is what caused my MC to fail, and it was leaking fluid down my firewall. Bummer for the paint.

nattybumppo
10-30-2010, 12:44 PM
New MC, flushed system, adjusted rear drums to Crash's specifications=like new performance!

PabloCruise
11-03-2010, 05:55 PM
New MC, flushed system, adjusted rear drums to Crash's specifications=like new performance!

What are the Crash specs for adjusting drums?

TIMZTOY
11-03-2010, 11:53 PM
Even when Ige is drinking, she is good!

Sinking pedal would point me to master cylinder.

Have you checked fluid level in your master?
you could also have a pin hole leak in the medal lines.. ive seen both situatuons with the same semptoms..

Would fluid necessarily leak out, being a closed system? Could a seal be torn that would cause there to be less pressure/resistance build up? .

no if the internal seal leaks that provides pressure from mechanical force, the presurized fluid is just bypasing the seal and "ocsionally" has a visiual seapage running down the booster. but not always id say a 50/50 youll see a leak.

nattybumppo
11-04-2010, 07:22 PM
Crash specs: tighten em til they JUST start to drag. Leave em there! Seems to work great!