[AJD] What are failed Master Brake Cylinder Symptoms?

[Bill Brueck]

Dean, I'd bet on the mc, we'll see what others have to say.  My 84 GMC big
van did much the same thing this season, I didn't work on it myself but
that's what got replaced. 

Since it sounds like you're ready to tackle this yourself, we used to get
repair kits for these things.  New set of plungers and 1-way valves, then
cleaned up the bore with a brake cylinder hone.  That shouldn't cost much.  

You may have a leak somewhere, too, but that's not what's ailing you for the
immediate problem.  I guess you gotta solve this before you can get to the
leak.  Or maybe the mc is the leaker, I guess that would make sense.

Yeah, wait for others before you jump.  You know my byline...

B²
 
Bill Brueck (brick)
Chatfield, MN, USA
 
Confusion is a higher state of knowledge than ignorance.


-----Original Message-----
From: antique-johndeere-bounces at lists.antique-tractor.com
[mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf Of
Dean VP
Sent: Wednesday, July 13, 2005 9:07 PM
To: at at lists.antique-tractor.com; AT JD
Subject: [AJD] What are failed Master Brake Cylinder Symptoms?

I have a brake problem all of a sudden on 68 Ford N600. Brake pedal took
several pumps to develop pressure, then bleeds off under pressure. If not
used for e few minutes takes several pumps again to get pressure and then
bleeds down slowly under peddle pressure.   No improvement over time. Can't
tell if all four wheels are getting brake activity but there isn't much
braking power at all even under heavy foot peddle pressure. Fluid level ok
and not dropping. Something is terribly amiss but I don't know how to
isolate the problem?  Master Brake Cylinder? Vacuum assist leaking? All four
hub cylinders leaking? Leaking line? (No loss of fluid right now but Master
Cylinder went dry over the winter during non-use!) A bunch of air in the
lines? 

I don't recall having brakes fail this drastically before or not eventually
self bleed. I'm really confused. Where do I start to diagnose the problem?
Can this just be a Master Cylinder failure or is it something else? Sure not
safe to drive this way. 

I'm reluctant to start throwing parts at the problem until I know for sure
what is wrong. Not sure I've ever had this major of brake failure before. I
need help.

Dean A. Van Peursem
Snohomish, WA 98290

I'm a walking storeroom of facts..... I've just lost the key to the
storeroom door 


www.deerelegacy.com

http://members.cox.net/classicweb/email.htm






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