RE: Still have broken brakes - need advice!

From: david.clement@verizon.net
Date: Tue Apr 26 2005 - 08:39:40 EDT


Smart A**, lets see now, 30+ years as an engineer I think I am technical enough
to understand! ;)

We have shouldered pins that thread into the spindle assembly from the opposite
side from the rotor. The threaded portion is not as long as the casting is
thick so they do not protrude out toward the rotor (shoulder prevents them from
being threaded in too deep), so the rotor can not come in contact with them
from that side. Now consider one of the pins breaks. Since the root of the
threaded portion is the smallest diameter that is where it's going to fracture.
Assuming you do not notice anything unusual in the braking (and that's a real
big assumtion) from the caliper only being supported by one pin over time the
remaing portion of pin may works it's way out of the bushing in the caliper. It
can't move toward the rotor because of the spindle casting but could work it's
way toward the center of the vehicle and fall out. If it bounced off a piece of
suspension just right it might be deflected into the rotor. May make a one time
noise but no scrapping. Also if the ~3/8" piece of broken thread were to work
it's way out same thing.

Unless I am completely missing something you are not going to have a caliper
pin scrapping against the rotor.

Dave Clement
99 SLT+ CC 4x4

In article <000601c549e2$395adda0$7900a8c0@highland>, barnesrv@comcast.net
("Rick Barnes") writes:
>
>
> How? Stuff breaks...its very technical....
>
> Rascal
>
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
> david.clement@verizon.net
> Sent: Monday, April 25, 2005 5:19 PM
> To: dakota-truck-moderator@bent.twistedbits.net
> Subject: RE: DML: Still have broken brakes - need advice!
>
>
> How can the caliper pins touch the rotors (providing you are using the
> correct
> parts)? They thread into the mounting holes on the spindle and do not
> protrude
> through the casting. You would have a much bigger problem than a scraping
> noise
> if the rotor got anywhere near the ears on the spindle.
>
> Dave Clement
> 99 SLT+ CC 4x4
>
> In article <000a01c549b8$410a2080$7900a8c0@highland>, barnesrv@comcast.net
> ("Rick Barnes") writes:
> >
> >
> > You are right Tom, they are "designed" to stop, but they will finally make
> > contact with a rotor under some circumstances. I sure have seen it
> happen.
> > Could also be a very bad wheel bearing.
> >
> > Rascal
> >
> > -----Original Message-----
> > From: owner-dakota-truck@bent.twistedbits.net
> > [mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Terrible Tom
> > Sent: Monday, April 25, 2005 12:01 PM
> > To: dakota-truck-moderator@bent.twistedbits.net
> > Subject: Re: DML: Still have broken brakes - need advice!
> >
> >
> > Rick Barnes wrote:
> > > Grinding in the front? Are your caliper pins dragging on your rotor?
> > >
> > > Rascal
> > >
> >
> > > On Sat, April 23, 2005 12:54 am, TerribleTom said:
> > >
> > >>I bled it out according to
> > >>the instructions. I was going to do it with the two bleeder hoses but
> > >>decided the company knew what they were talking about so I tried it with
> > >>just the solid plugs.
> > >
> > >
> > > I think you just identified your own problem. I vote for throwing out
> the
> > > destructions and just going with what you know. They print those things
> > > up for people like me who are inept at working on vehicles, because they
> > > know I'm going to get fed up anyway and end up taking it to someone who
> > > knows what they're doing (like you, or Jon, or the dealership).
> > >
> >
> > Hmm - Don't see how that could be the problem. The caliper pins are
> > designed to stop at a certain depth and not go in any further. As I am
> > yet to dive into trying to fix the grinding problem - I'm not ruling
> > anything out yet. But I have a nagging feeling it is something major...
> >
> > --
> >
> ----------------------------------------------------------------------------
> > -----------
> > ****** COUNTDOWN TO 2005 DML BBQ *92* DAYS LEFT! ******
> > *Caution* Terrible Tom may suddenly accelerate to dangerous speeds. What
> > pond?
> > AIM & Yahoo: SilverEightynine - http://members.aol.com/silvereightynine/
> >
> >
> >
>
>



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