Hi
Ron,
I never
understood that failure—have you ever REALLY seen it? brakes run at over 1000
psi, no way can an inwardly collapsed hose not open right up at 1000
psi? Opposite issue, burst is the failure mode? Yet I see this listed “as a
possibility” a lot? How can that collapse happen? ( think “collapsed” garden
hose—that is at 50 psi, water flow opens it) As an engineer, I cannot
believe it can stay blocked at 1000 psi.. And brake hose wall is very stiff,
does not just fall in? . My .02. If partially blocked, by junk?, maybe shoes
cannot pull back, but that would not lock brakes up, only drag them . Even
that I have trouble with ?
That being
said, very real problems with these brakes are at times really hard to solve.
Cams turned the wrong way are #1 on my experience. They will adjust that way,
but all wrong. And new standard arc shoes into oversize turned drums that do
not touch all the way around for 3000 miles, aggravated by overwinter rust as
Bob says. But really hard to trust it is OK, if it locks once or 5 times, and
then sort of stops locking.. Hate that.
I do not
claim to know answer,--- but to illustrate: I have been into RF wheel (only)
of 67 dart convert( not same brakes) at least 6 times now. Locks “once
in a while” , new drum shoes , small parts, even spindle( ?bent) . It has been
ok for a while. I suspect a small wheel cylinder leak once in great while,
dampens shoe? changed that too.
Thinking
about it, if one wheel, something is causing it, if 2 or 3, probably rust/self
energizing too much. 3 wheel cylinders will not spring leak at
once?
From: Chrysler300@xxxxxxxxxxxxxxx
[mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of 'Ron Waters'
ronbo97@xxxxxxxxxxx [Chrysler300]
Sent: Monday, April 06, 2015 2:37
PM
To: Chrysler300@xxxxxxxxxxxxxxx
Subject: Re:
[Chrysler300] 300F Brakes
How old are your brake hoses ? Sounds like they are
collapsing internally, causing fluid not to return to the master
cylinder.
First nice day here in Dayton OH, so
I fired up the 300F to get it out of winter storage. Engine started up
just fine, but the brakes didn't. When I apply the brakes normally,
they totally lock up. Backing up, by only a few inches, releases
them, but normal stops again result in lock up. Before I tear into the
brakes, any suggestions about I might be looking for? Terry
McTaggart
Back to the Home of the Forward Look Network
Archive Sitemap